./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/reducercommutativity/sum40-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 47ea0209 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/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_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/reducercommutativity/sum40-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash d615723bd3f4193c30af142b587a80ce924c7083a75b532c90d98415d1700958 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 08:08:42,672 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 08:08:42,676 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 08:08:42,736 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 08:08:42,737 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 08:08:42,742 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 08:08:42,745 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 08:08:42,750 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 08:08:42,752 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 08:08:42,761 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 08:08:42,762 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 08:08:42,764 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 08:08:42,764 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 08:08:42,767 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 08:08:42,769 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 08:08:42,771 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 08:08:42,773 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 08:08:42,774 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 08:08:42,780 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 08:08:42,789 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 08:08:42,791 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 08:08:42,792 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 08:08:42,795 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 08:08:42,796 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 08:08:42,800 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 08:08:42,801 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 08:08:42,801 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 08:08:42,803 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 08:08:42,804 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 08:08:42,806 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 08:08:42,806 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 08:08:42,807 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 08:08:42,809 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 08:08:42,810 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 08:08:42,811 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 08:08:42,812 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 08:08:42,812 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 08:08:42,813 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 08:08:42,813 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 08:08:42,814 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 08:08:42,814 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 08:08:42,815 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 08:08:42,859 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 08:08:42,859 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 08:08:42,860 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 08:08:42,860 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 08:08:42,861 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 08:08:42,862 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 08:08:42,862 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 08:08:42,862 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 08:08:42,862 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 08:08:42,862 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 08:08:42,863 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 08:08:42,864 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 08:08:42,864 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 08:08:42,864 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 08:08:42,864 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 08:08:42,864 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 08:08:42,865 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 08:08:42,865 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 08:08:42,865 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 08:08:42,865 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 08:08:42,865 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 08:08:42,866 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 08:08:42,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:08:42,866 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 08:08:42,866 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 08:08:42,866 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 08:08:42,867 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 08:08:42,867 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 08:08:42,867 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 08:08:42,869 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 08:08:42,869 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 08:08:42,869 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 08:08:42,869 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_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> d615723bd3f4193c30af142b587a80ce924c7083a75b532c90d98415d1700958 [2021-11-07 08:08:43,158 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 08:08:43,199 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 08:08:43,202 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 08:08:43,203 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 08:08:43,204 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 08:08:43,205 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/reducercommutativity/sum40-2.i [2021-11-07 08:08:43,324 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/data/b128a08aa/9eab58a0750e496c92e3f7ae01070bb6/FLAG47db93f8a [2021-11-07 08:08:43,793 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 08:08:43,794 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/sv-benchmarks/c/reducercommutativity/sum40-2.i [2021-11-07 08:08:43,800 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/data/b128a08aa/9eab58a0750e496c92e3f7ae01070bb6/FLAG47db93f8a [2021-11-07 08:08:44,158 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/data/b128a08aa/9eab58a0750e496c92e3f7ae01070bb6 [2021-11-07 08:08:44,161 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 08:08:44,162 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 08:08:44,171 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 08:08:44,171 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 08:08:44,175 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 08:08:44,176 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:08:44" (1/1) ... [2021-11-07 08:08:44,177 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45874d88 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:08:44, skipping insertion in model container [2021-11-07 08:08:44,177 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 08:08:44" (1/1) ... [2021-11-07 08:08:44,184 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 08:08:44,199 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 08:08:44,391 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/sv-benchmarks/c/reducercommutativity/sum40-2.i[1277,1290] [2021-11-07 08:08:44,395 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:08:44,401 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 08:08:44,420 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/sv-benchmarks/c/reducercommutativity/sum40-2.i[1277,1290] [2021-11-07 08:08:44,421 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 08:08:44,435 INFO L208 MainTranslator]: Completed translation [2021-11-07 08:08:44,435 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:08:44 WrapperNode [2021-11-07 08:08:44,436 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 08:08:44,437 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 08:08:44,437 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 08:08:44,437 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 08:08:44,446 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:08:44" (1/1) ... [2021-11-07 08:08:44,453 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:08:44" (1/1) ... [2021-11-07 08:08:44,478 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 08:08:44,479 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 08:08:44,479 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 08:08:44,479 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 08:08:44,487 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:08:44" (1/1) ... [2021-11-07 08:08:44,488 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:08:44" (1/1) ... [2021-11-07 08:08:44,490 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:08:44" (1/1) ... [2021-11-07 08:08:44,491 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:08:44" (1/1) ... [2021-11-07 08:08:44,498 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:08:44" (1/1) ... [2021-11-07 08:08:44,502 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:08:44" (1/1) ... [2021-11-07 08:08:44,504 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:08:44" (1/1) ... [2021-11-07 08:08:44,507 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 08:08:44,508 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 08:08:44,508 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 08:08:44,509 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 08:08:44,510 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:08:44" (1/1) ... [2021-11-07 08:08:44,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 08:08:44,544 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:08:44,559 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 08:08:44,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 08:08:44,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 08:08:44,619 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 08:08:44,619 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-11-07 08:08:44,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 08:08:44,620 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 08:08:44,620 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-11-07 08:08:44,620 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-11-07 08:08:44,936 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 08:08:44,936 INFO L299 CfgBuilder]: Removed 15 assume(true) statements. [2021-11-07 08:08:44,938 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:08:44 BoogieIcfgContainer [2021-11-07 08:08:44,938 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 08:08:44,940 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 08:08:44,940 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 08:08:44,959 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 08:08:44,959 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 08:08:44" (1/3) ... [2021-11-07 08:08:44,960 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44e4be9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:08:44, skipping insertion in model container [2021-11-07 08:08:44,960 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 08:08:44" (2/3) ... [2021-11-07 08:08:44,960 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@44e4be9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 08:08:44, skipping insertion in model container [2021-11-07 08:08:44,961 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 08:08:44" (3/3) ... [2021-11-07 08:08:44,962 INFO L111 eAbstractionObserver]: Analyzing ICFG sum40-2.i [2021-11-07 08:08:44,967 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 08:08:44,967 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 08:08:45,038 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 08:08:45,045 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=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, 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 08:08:45,045 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 08:08:45,080 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:45,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-07 08:08:45,101 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:08:45,102 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:08:45,103 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:08:45,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:08:45,108 INFO L85 PathProgramCache]: Analyzing trace with hash 1858201700, now seen corresponding path program 1 times [2021-11-07 08:08:45,122 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:08:45,129 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975414196] [2021-11-07 08:08:45,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:08:45,131 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:08:45,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:08:45,369 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 08:08:45,369 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:08:45,370 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975414196] [2021-11-07 08:08:45,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975414196] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:08:45,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 08:08:45,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 08:08:45,375 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673781830] [2021-11-07 08:08:45,380 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:08:45,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:08:45,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:08:45,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 08:08:45,405 INFO L87 Difference]: Start difference. First operand has 27 states, 25 states have (on average 1.48) internal successors, (37), 26 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:45,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:08:45,452 INFO L93 Difference]: Finished difference Result 52 states and 72 transitions. [2021-11-07 08:08:45,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:08:45,456 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-07 08:08:45,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:08:45,466 INFO L225 Difference]: With dead ends: 52 [2021-11-07 08:08:45,467 INFO L226 Difference]: Without dead ends: 25 [2021-11-07 08:08:45,470 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 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 08:08:45,487 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-11-07 08:08:45,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2021-11-07 08:08:45,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:45,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2021-11-07 08:08:45,509 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 17 [2021-11-07 08:08:45,509 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:08:45,510 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2021-11-07 08:08:45,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.666666666666667) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:45,511 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2021-11-07 08:08:45,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-11-07 08:08:45,513 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:08:45,513 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:08:45,515 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 08:08:45,515 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:08:45,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:08:45,520 INFO L85 PathProgramCache]: Analyzing trace with hash 290125730, now seen corresponding path program 1 times [2021-11-07 08:08:45,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:08:45,521 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915987915] [2021-11-07 08:08:45,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:08:45,522 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:08:45,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:08:45,623 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 08:08:45,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:08:45,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915987915] [2021-11-07 08:08:45,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915987915] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:08:45,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127963202] [2021-11-07 08:08:45,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:08:45,625 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:08:45,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:08:45,630 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:08:45,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 08:08:45,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:08:45,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 08:08:45,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:08:45,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-07 08:08:45,881 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127963202] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:08:45,882 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:08:45,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-07 08:08:45,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1163839117] [2021-11-07 08:08:45,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:08:45,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:08:45,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:08:45,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:08:45,885 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:45,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:08:45,931 INFO L93 Difference]: Finished difference Result 46 states and 55 transitions. [2021-11-07 08:08:45,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:08:45,933 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-11-07 08:08:45,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:08:45,934 INFO L225 Difference]: With dead ends: 46 [2021-11-07 08:08:45,934 INFO L226 Difference]: Without dead ends: 30 [2021-11-07 08:08:45,935 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:08:45,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-07 08:08:45,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 27. [2021-11-07 08:08:45,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.1923076923076923) internal successors, (31), 26 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:45,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2021-11-07 08:08:45,947 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 19 [2021-11-07 08:08:45,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:08:45,947 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2021-11-07 08:08:45,948 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:45,949 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2021-11-07 08:08:45,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-07 08:08:45,950 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:08:45,951 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:08:45,989 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2021-11-07 08:08:46,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-11-07 08:08:46,171 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:08:46,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:08:46,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1760334112, now seen corresponding path program 1 times [2021-11-07 08:08:46,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:08:46,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70484139] [2021-11-07 08:08:46,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:08:46,173 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:08:46,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:08:46,253 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-07 08:08:46,253 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:08:46,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70484139] [2021-11-07 08:08:46,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70484139] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:08:46,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287041131] [2021-11-07 08:08:46,254 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:08:46,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:08:46,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:08:46,258 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:08:46,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 08:08:46,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:08:46,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 2 conjunts are in the unsatisfiable core [2021-11-07 08:08:46,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:08:46,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 08:08:46,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1287041131] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 08:08:46,447 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-07 08:08:46,447 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 5 [2021-11-07 08:08:46,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503821498] [2021-11-07 08:08:46,448 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 08:08:46,448 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:08:46,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 08:08:46,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:08:46,449 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:46,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:08:46,461 INFO L93 Difference]: Finished difference Result 38 states and 43 transitions. [2021-11-07 08:08:46,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 08:08:46,461 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-07 08:08:46,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:08:46,463 INFO L225 Difference]: With dead ends: 38 [2021-11-07 08:08:46,463 INFO L226 Difference]: Without dead ends: 29 [2021-11-07 08:08:46,463 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:08:46,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-11-07 08:08:46,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2021-11-07 08:08:46,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1851851851851851) internal successors, (32), 27 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:46,468 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2021-11-07 08:08:46,469 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 25 [2021-11-07 08:08:46,469 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:08:46,469 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2021-11-07 08:08:46,469 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 8.333333333333334) internal successors, (25), 3 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:46,470 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2021-11-07 08:08:46,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-07 08:08:46,471 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:08:46,471 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:08:46,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 08:08:46,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:08:46,698 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:08:46,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:08:46,698 INFO L85 PathProgramCache]: Analyzing trace with hash 1208457118, now seen corresponding path program 1 times [2021-11-07 08:08:46,699 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:08:46,699 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524631501] [2021-11-07 08:08:46,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:08:46,699 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:08:46,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:08:46,751 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 08:08:46,751 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:08:46,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524631501] [2021-11-07 08:08:46,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524631501] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:08:46,752 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873716811] [2021-11-07 08:08:46,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:08:46,753 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:08:46,753 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:08:46,754 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:08:46,772 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 08:08:46,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:08:46,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:08:46,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:08:46,968 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-07 08:08:46,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873716811] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:08:46,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:08:46,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-07 08:08:46,970 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608205637] [2021-11-07 08:08:46,971 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 08:08:46,971 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:08:46,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 08:08:46,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:08:46,973 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:47,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:08:47,016 INFO L93 Difference]: Finished difference Result 54 states and 62 transitions. [2021-11-07 08:08:47,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 08:08:47,018 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-07 08:08:47,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:08:47,019 INFO L225 Difference]: With dead ends: 54 [2021-11-07 08:08:47,025 INFO L226 Difference]: Without dead ends: 31 [2021-11-07 08:08:47,026 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 08:08:47,026 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-11-07 08:08:47,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2021-11-07 08:08:47,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:47,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2021-11-07 08:08:47,035 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 27 [2021-11-07 08:08:47,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:08:47,036 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2021-11-07 08:08:47,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:47,036 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2021-11-07 08:08:47,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-07 08:08:47,038 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:08:47,038 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, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:08:47,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-07 08:08:47,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:08:47,250 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:08:47,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:08:47,250 INFO L85 PathProgramCache]: Analyzing trace with hash -1993526948, now seen corresponding path program 2 times [2021-11-07 08:08:47,250 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:08:47,250 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1507691155] [2021-11-07 08:08:47,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:08:47,251 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:08:47,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:08:47,299 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 08:08:47,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:08:47,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1507691155] [2021-11-07 08:08:47,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1507691155] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:08:47,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1637392884] [2021-11-07 08:08:47,300 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:08:47,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:08:47,301 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:08:47,302 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:08:47,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 08:08:47,406 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:08:47,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:08:47,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 08:08:47,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:08:47,512 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-07 08:08:47,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1637392884] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:08:47,518 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:08:47,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-11-07 08:08:47,519 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128064838] [2021-11-07 08:08:47,523 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 08:08:47,524 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:08:47,524 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 08:08:47,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:08:47,525 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:47,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:08:47,604 INFO L93 Difference]: Finished difference Result 61 states and 71 transitions. [2021-11-07 08:08:47,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:08:47,605 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-07 08:08:47,605 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:08:47,606 INFO L225 Difference]: With dead ends: 61 [2021-11-07 08:08:47,606 INFO L226 Difference]: Without dead ends: 42 [2021-11-07 08:08:47,606 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-07 08:08:47,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-07 08:08:47,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 38. [2021-11-07 08:08:47,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.135135135135135) internal successors, (42), 37 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:47,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 42 transitions. [2021-11-07 08:08:47,612 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 42 transitions. Word has length 29 [2021-11-07 08:08:47,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:08:47,612 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 42 transitions. [2021-11-07 08:08:47,613 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 6.833333333333333) internal successors, (41), 6 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:47,613 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 42 transitions. [2021-11-07 08:08:47,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-07 08:08:47,614 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:08:47,614 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:08:47,642 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2021-11-07 08:08:47,837 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:08:47,837 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:08:47,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:08:47,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1059243608, now seen corresponding path program 3 times [2021-11-07 08:08:47,838 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:08:47,838 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312755299] [2021-11-07 08:08:47,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:08:47,839 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:08:47,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:08:47,925 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-07 08:08:47,925 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:08:47,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312755299] [2021-11-07 08:08:47,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312755299] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:08:47,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245403317] [2021-11-07 08:08:47,926 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:08:47,927 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:08:47,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:08:47,930 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:08:47,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 08:08:48,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-07 08:08:48,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:08:48,102 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 08:08:48,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:08:48,217 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-07 08:08:48,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245403317] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:08:48,217 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:08:48,218 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-11-07 08:08:48,218 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846856183] [2021-11-07 08:08:48,219 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 08:08:48,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:08:48,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 08:08:48,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:08:48,224 INFO L87 Difference]: Start difference. First operand 38 states and 42 transitions. Second operand has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:48,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:08:48,307 INFO L93 Difference]: Finished difference Result 81 states and 92 transitions. [2021-11-07 08:08:48,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 08:08:48,307 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-07 08:08:48,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:08:48,308 INFO L225 Difference]: With dead ends: 81 [2021-11-07 08:08:48,308 INFO L226 Difference]: Without dead ends: 50 [2021-11-07 08:08:48,309 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-07 08:08:48,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-07 08:08:48,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 46. [2021-11-07 08:08:48,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1111111111111112) internal successors, (50), 45 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:48,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 50 transitions. [2021-11-07 08:08:48,316 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 50 transitions. Word has length 37 [2021-11-07 08:08:48,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:08:48,317 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 50 transitions. [2021-11-07 08:08:48,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 5.5) internal successors, (44), 8 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:48,317 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 50 transitions. [2021-11-07 08:08:48,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-07 08:08:48,318 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:08:48,319 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:08:48,358 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 08:08:48,537 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:08:48,538 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:08:48,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:08:48,538 INFO L85 PathProgramCache]: Analyzing trace with hash -1892525292, now seen corresponding path program 4 times [2021-11-07 08:08:48,538 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:08:48,538 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549190502] [2021-11-07 08:08:48,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:08:48,539 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:08:48,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:08:48,663 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-07 08:08:48,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:08:48,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549190502] [2021-11-07 08:08:48,666 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549190502] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:08:48,666 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748367043] [2021-11-07 08:08:48,666 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:08:48,667 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:08:48,670 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:08:48,674 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:08:48,678 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 08:08:48,790 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:08:48,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:08:48,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 08:08:48,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:08:48,903 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-07 08:08:48,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748367043] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:08:48,904 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:08:48,904 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-07 08:08:48,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112653269] [2021-11-07 08:08:48,908 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 08:08:48,908 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:08:48,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 08:08:48,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:08:48,909 INFO L87 Difference]: Start difference. First operand 46 states and 50 transitions. Second operand has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:48,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:08:48,942 INFO L93 Difference]: Finished difference Result 86 states and 94 transitions. [2021-11-07 08:08:48,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 08:08:48,943 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 45 [2021-11-07 08:08:48,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:08:48,949 INFO L225 Difference]: With dead ends: 86 [2021-11-07 08:08:48,951 INFO L226 Difference]: Without dead ends: 49 [2021-11-07 08:08:48,952 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-07 08:08:48,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-11-07 08:08:48,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2021-11-07 08:08:48,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.1063829787234043) internal successors, (52), 47 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:48,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2021-11-07 08:08:48,962 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 45 [2021-11-07 08:08:48,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:08:48,964 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2021-11-07 08:08:48,967 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 4.857142857142857) internal successors, (34), 7 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:48,967 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2021-11-07 08:08:48,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-07 08:08:48,972 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:08:48,973 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:08:49,009 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 08:08:49,173 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:08:49,174 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:08:49,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:08:49,174 INFO L85 PathProgramCache]: Analyzing trace with hash 704135506, now seen corresponding path program 5 times [2021-11-07 08:08:49,174 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:08:49,174 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667771485] [2021-11-07 08:08:49,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:08:49,175 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:08:49,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:08:49,269 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-07 08:08:49,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:08:49,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667771485] [2021-11-07 08:08:49,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667771485] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:08:49,272 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290433070] [2021-11-07 08:08:49,273 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:08:49,273 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:08:49,273 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:08:49,286 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:08:49,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 08:08:49,432 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-07 08:08:49,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:08:49,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 08:08:49,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:08:49,590 INFO L134 CoverageAnalysis]: Checked inductivity of 47 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 38 trivial. 0 not checked. [2021-11-07 08:08:49,590 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290433070] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:08:49,590 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:08:49,591 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-11-07 08:08:49,591 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1493987967] [2021-11-07 08:08:49,591 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 08:08:49,592 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:08:49,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 08:08:49,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:08:49,593 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:49,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:08:49,688 INFO L93 Difference]: Finished difference Result 97 states and 108 transitions. [2021-11-07 08:08:49,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 08:08:49,688 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-07 08:08:49,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:08:49,691 INFO L225 Difference]: With dead ends: 97 [2021-11-07 08:08:49,691 INFO L226 Difference]: Without dead ends: 60 [2021-11-07 08:08:49,692 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:08:49,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-07 08:08:49,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 56. [2021-11-07 08:08:49,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0909090909090908) internal successors, (60), 55 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:49,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 60 transitions. [2021-11-07 08:08:49,715 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 60 transitions. Word has length 47 [2021-11-07 08:08:49,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:08:49,716 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 60 transitions. [2021-11-07 08:08:49,716 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 11 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:49,716 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 60 transitions. [2021-11-07 08:08:49,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-07 08:08:49,718 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:08:49,718 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 4, 4, 4, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:08:49,761 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-07 08:08:49,945 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:08:49,946 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:08:49,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:08:49,946 INFO L85 PathProgramCache]: Analyzing trace with hash -788382450, now seen corresponding path program 6 times [2021-11-07 08:08:49,946 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:08:49,946 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996163664] [2021-11-07 08:08:49,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:08:49,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:08:49,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:08:50,065 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 52 trivial. 0 not checked. [2021-11-07 08:08:50,065 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:08:50,066 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996163664] [2021-11-07 08:08:50,068 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996163664] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:08:50,068 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478533591] [2021-11-07 08:08:50,068 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:08:50,069 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:08:50,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:08:50,074 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:08:50,097 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 08:08:50,382 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-07 08:08:50,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:08:50,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 08:08:50,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:08:50,540 INFO L134 CoverageAnalysis]: Checked inductivity of 77 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-07 08:08:50,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478533591] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:08:50,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:08:50,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 5] total 11 [2021-11-07 08:08:50,544 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1600381399] [2021-11-07 08:08:50,545 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 08:08:50,545 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:08:50,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 08:08:50,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:08:50,546 INFO L87 Difference]: Start difference. First operand 56 states and 60 transitions. Second operand has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:50,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:08:50,588 INFO L93 Difference]: Finished difference Result 105 states and 114 transitions. [2021-11-07 08:08:50,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 08:08:50,588 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-07 08:08:50,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:08:50,589 INFO L225 Difference]: With dead ends: 105 [2021-11-07 08:08:50,589 INFO L226 Difference]: Without dead ends: 62 [2021-11-07 08:08:50,590 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:08:50,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-07 08:08:50,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 60. [2021-11-07 08:08:50,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0847457627118644) internal successors, (64), 59 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:50,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 64 transitions. [2021-11-07 08:08:50,596 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 64 transitions. Word has length 55 [2021-11-07 08:08:50,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:08:50,596 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 64 transitions. [2021-11-07 08:08:50,596 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 5.0) internal successors, (55), 11 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:50,597 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 64 transitions. [2021-11-07 08:08:50,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-11-07 08:08:50,598 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:08:50,598 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:08:50,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-07 08:08:50,821 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:08:50,822 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:08:50,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:08:50,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1118484150, now seen corresponding path program 7 times [2021-11-07 08:08:50,822 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:08:50,822 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109777764] [2021-11-07 08:08:50,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:08:50,823 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:08:50,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:08:50,912 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-07 08:08:50,912 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:08:50,912 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109777764] [2021-11-07 08:08:50,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109777764] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:08:50,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297733680] [2021-11-07 08:08:50,913 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:08:50,913 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:08:50,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:08:50,918 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:08:50,922 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-07 08:08:51,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:08:51,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 08:08:51,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:08:51,245 INFO L134 CoverageAnalysis]: Checked inductivity of 93 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-07 08:08:51,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1297733680] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:08:51,245 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:08:51,245 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-11-07 08:08:51,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959473791] [2021-11-07 08:08:51,248 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 08:08:51,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:08:51,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 08:08:51,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:08:51,249 INFO L87 Difference]: Start difference. First operand 60 states and 64 transitions. Second operand has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:51,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:08:51,286 INFO L93 Difference]: Finished difference Result 108 states and 116 transitions. [2021-11-07 08:08:51,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 08:08:51,287 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2021-11-07 08:08:51,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:08:51,288 INFO L225 Difference]: With dead ends: 108 [2021-11-07 08:08:51,288 INFO L226 Difference]: Without dead ends: 63 [2021-11-07 08:08:51,293 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-07 08:08:51,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-11-07 08:08:51,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 62. [2021-11-07 08:08:51,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0819672131147542) internal successors, (66), 61 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:51,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 66 transitions. [2021-11-07 08:08:51,306 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 66 transitions. Word has length 59 [2021-11-07 08:08:51,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:08:51,307 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 66 transitions. [2021-11-07 08:08:51,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 4.0) internal successors, (40), 10 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:51,307 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 66 transitions. [2021-11-07 08:08:51,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-11-07 08:08:51,308 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:08:51,309 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:08:51,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-07 08:08:51,523 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-07 08:08:51,523 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:08:51,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:08:51,524 INFO L85 PathProgramCache]: Analyzing trace with hash 2146724616, now seen corresponding path program 8 times [2021-11-07 08:08:51,524 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:08:51,524 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3942785] [2021-11-07 08:08:51,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:08:51,524 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:08:51,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:08:51,624 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-07 08:08:51,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:08:51,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3942785] [2021-11-07 08:08:51,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3942785] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:08:51,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862423405] [2021-11-07 08:08:51,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:08:51,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:08:51,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:08:51,627 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:08:51,653 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-07 08:08:51,814 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:08:51,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:08:51,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 08:08:51,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:08:51,972 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-07 08:08:51,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [862423405] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:08:51,972 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:08:51,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-11-07 08:08:51,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004832600] [2021-11-07 08:08:51,973 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 08:08:51,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:08:51,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 08:08:51,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:08:51,974 INFO L87 Difference]: Start difference. First operand 62 states and 66 transitions. Second operand has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:52,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:08:52,005 INFO L93 Difference]: Finished difference Result 110 states and 118 transitions. [2021-11-07 08:08:52,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 08:08:52,005 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 61 [2021-11-07 08:08:52,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:08:52,006 INFO L225 Difference]: With dead ends: 110 [2021-11-07 08:08:52,006 INFO L226 Difference]: Without dead ends: 65 [2021-11-07 08:08:52,007 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-07 08:08:52,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-11-07 08:08:52,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2021-11-07 08:08:52,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0793650793650793) internal successors, (68), 63 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:52,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 68 transitions. [2021-11-07 08:08:52,020 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 68 transitions. Word has length 61 [2021-11-07 08:08:52,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:08:52,020 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 68 transitions. [2021-11-07 08:08:52,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.8181818181818183) internal successors, (42), 11 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:52,020 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 68 transitions. [2021-11-07 08:08:52,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-11-07 08:08:52,021 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:08:52,022 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:08:52,042 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-07 08:08:52,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-07 08:08:52,230 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:08:52,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:08:52,230 INFO L85 PathProgramCache]: Analyzing trace with hash 391255366, now seen corresponding path program 9 times [2021-11-07 08:08:52,230 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:08:52,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225433550] [2021-11-07 08:08:52,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:08:52,230 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:08:52,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:08:52,332 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-07 08:08:52,332 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:08:52,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225433550] [2021-11-07 08:08:52,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [225433550] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:08:52,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553879036] [2021-11-07 08:08:52,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:08:52,333 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:08:52,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:08:52,334 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:08:52,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-07 08:08:52,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-07 08:08:52,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:08:52,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 08:08:52,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:08:52,719 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-07 08:08:52,719 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553879036] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:08:52,719 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:08:52,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 15 [2021-11-07 08:08:52,720 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237543614] [2021-11-07 08:08:52,720 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 08:08:52,720 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:08:52,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 08:08:52,722 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-11-07 08:08:52,723 INFO L87 Difference]: Start difference. First operand 64 states and 68 transitions. Second operand has 15 states, 15 states have (on average 4.2) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:52,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:08:52,792 INFO L93 Difference]: Finished difference Result 115 states and 124 transitions. [2021-11-07 08:08:52,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 08:08:52,792 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-11-07 08:08:52,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:08:52,796 INFO L225 Difference]: With dead ends: 115 [2021-11-07 08:08:52,796 INFO L226 Difference]: Without dead ends: 70 [2021-11-07 08:08:52,796 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2021-11-07 08:08:52,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-07 08:08:52,810 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 68. [2021-11-07 08:08:52,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0746268656716418) internal successors, (72), 67 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:52,811 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 72 transitions. [2021-11-07 08:08:52,811 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 72 transitions. Word has length 63 [2021-11-07 08:08:52,811 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:08:52,811 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 72 transitions. [2021-11-07 08:08:52,812 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 4.2) internal successors, (63), 15 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:52,812 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 72 transitions. [2021-11-07 08:08:52,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-11-07 08:08:52,813 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:08:52,813 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:08:52,856 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-07 08:08:53,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:08:53,049 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:08:53,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:08:53,050 INFO L85 PathProgramCache]: Analyzing trace with hash -1743137406, now seen corresponding path program 10 times [2021-11-07 08:08:53,050 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:08:53,050 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400581490] [2021-11-07 08:08:53,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:08:53,050 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:08:53,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:08:53,179 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-07 08:08:53,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:08:53,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400581490] [2021-11-07 08:08:53,180 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400581490] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:08:53,180 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964370763] [2021-11-07 08:08:53,180 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:08:53,181 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:08:53,181 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:08:53,182 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:08:53,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-07 08:08:53,436 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:08:53,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:08:53,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 08:08:53,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:08:53,642 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-07 08:08:53,643 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964370763] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:08:53,643 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:08:53,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-11-07 08:08:53,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449049601] [2021-11-07 08:08:53,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 08:08:53,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:08:53,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 08:08:53,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-07 08:08:53,645 INFO L87 Difference]: Start difference. First operand 68 states and 72 transitions. Second operand has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:53,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:08:53,685 INFO L93 Difference]: Finished difference Result 118 states and 126 transitions. [2021-11-07 08:08:53,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 08:08:53,686 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 67 [2021-11-07 08:08:53,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:08:53,687 INFO L225 Difference]: With dead ends: 118 [2021-11-07 08:08:53,687 INFO L226 Difference]: Without dead ends: 71 [2021-11-07 08:08:53,687 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-07 08:08:53,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-11-07 08:08:53,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 70. [2021-11-07 08:08:53,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0724637681159421) internal successors, (74), 69 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:53,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 74 transitions. [2021-11-07 08:08:53,692 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 74 transitions. Word has length 67 [2021-11-07 08:08:53,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:08:53,692 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 74 transitions. [2021-11-07 08:08:53,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 3.5384615384615383) internal successors, (46), 13 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:53,693 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 74 transitions. [2021-11-07 08:08:53,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-11-07 08:08:53,694 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:08:53,694 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:08:53,730 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-07 08:08:53,917 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:08:53,918 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:08:53,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:08:53,918 INFO L85 PathProgramCache]: Analyzing trace with hash 684874048, now seen corresponding path program 11 times [2021-11-07 08:08:53,918 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:08:53,918 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142047735] [2021-11-07 08:08:53,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:08:53,918 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:08:53,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:08:54,050 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-07 08:08:54,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:08:54,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142047735] [2021-11-07 08:08:54,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142047735] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:08:54,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320850295] [2021-11-07 08:08:54,051 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:08:54,052 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:08:54,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:08:54,054 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:08:54,065 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-07 08:08:54,636 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2021-11-07 08:08:54,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:08:54,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 08:08:54,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:08:54,803 INFO L134 CoverageAnalysis]: Checked inductivity of 164 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-07 08:08:54,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320850295] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:08:54,804 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:08:54,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-11-07 08:08:54,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308318717] [2021-11-07 08:08:54,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 08:08:54,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:08:54,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 08:08:54,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-11-07 08:08:54,806 INFO L87 Difference]: Start difference. First operand 70 states and 74 transitions. Second operand has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:54,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:08:54,843 INFO L93 Difference]: Finished difference Result 120 states and 128 transitions. [2021-11-07 08:08:54,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 08:08:54,843 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 69 [2021-11-07 08:08:54,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:08:54,844 INFO L225 Difference]: With dead ends: 120 [2021-11-07 08:08:54,844 INFO L226 Difference]: Without dead ends: 73 [2021-11-07 08:08:54,845 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-11-07 08:08:54,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-07 08:08:54,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2021-11-07 08:08:54,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.0704225352112675) internal successors, (76), 71 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:54,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 76 transitions. [2021-11-07 08:08:54,849 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 76 transitions. Word has length 69 [2021-11-07 08:08:54,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:08:54,850 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 76 transitions. [2021-11-07 08:08:54,850 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 3.4285714285714284) internal successors, (48), 14 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:54,850 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 76 transitions. [2021-11-07 08:08:54,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-11-07 08:08:54,856 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:08:54,856 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 4, 4, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:08:54,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-07 08:08:55,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-07 08:08:55,081 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:08:55,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:08:55,082 INFO L85 PathProgramCache]: Analyzing trace with hash 1836639614, now seen corresponding path program 12 times [2021-11-07 08:08:55,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:08:55,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117576650] [2021-11-07 08:08:55,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:08:55,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:08:55,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:08:55,252 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 64 trivial. 0 not checked. [2021-11-07 08:08:55,252 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:08:55,252 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117576650] [2021-11-07 08:08:55,253 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117576650] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:08:55,253 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378302123] [2021-11-07 08:08:55,253 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:08:55,253 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:08:55,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:08:55,258 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:08:55,277 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-07 08:08:55,813 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2021-11-07 08:08:55,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:08:55,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 08:08:55,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:08:56,049 INFO L134 CoverageAnalysis]: Checked inductivity of 185 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 169 trivial. 0 not checked. [2021-11-07 08:08:56,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378302123] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:08:56,050 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:08:56,050 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 7] total 19 [2021-11-07 08:08:56,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621104005] [2021-11-07 08:08:56,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-07 08:08:56,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:08:56,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-07 08:08:56,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-11-07 08:08:56,053 INFO L87 Difference]: Start difference. First operand 72 states and 76 transitions. Second operand has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:56,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:08:56,129 INFO L93 Difference]: Finished difference Result 125 states and 134 transitions. [2021-11-07 08:08:56,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 08:08:56,130 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-11-07 08:08:56,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:08:56,131 INFO L225 Difference]: With dead ends: 125 [2021-11-07 08:08:56,131 INFO L226 Difference]: Without dead ends: 78 [2021-11-07 08:08:56,132 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2021-11-07 08:08:56,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-07 08:08:56,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 76. [2021-11-07 08:08:56,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0666666666666667) internal successors, (80), 75 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:56,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 80 transitions. [2021-11-07 08:08:56,137 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 80 transitions. Word has length 71 [2021-11-07 08:08:56,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:08:56,137 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 80 transitions. [2021-11-07 08:08:56,138 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.736842105263158) internal successors, (71), 19 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:56,138 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 80 transitions. [2021-11-07 08:08:56,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-11-07 08:08:56,139 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:08:56,139 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:08:56,183 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-07 08:08:56,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-07 08:08:56,366 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:08:56,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:08:56,366 INFO L85 PathProgramCache]: Analyzing trace with hash 970283450, now seen corresponding path program 13 times [2021-11-07 08:08:56,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:08:56,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124963238] [2021-11-07 08:08:56,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:08:56,367 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:08:56,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:08:56,551 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-07 08:08:56,551 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:08:56,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124963238] [2021-11-07 08:08:56,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124963238] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:08:56,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887958660] [2021-11-07 08:08:56,551 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:08:56,552 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:08:56,552 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:08:56,553 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:08:56,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-07 08:08:56,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:08:56,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 08:08:56,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:08:57,019 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-07 08:08:57,019 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1887958660] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:08:57,020 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:08:57,020 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-11-07 08:08:57,020 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877067786] [2021-11-07 08:08:57,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 08:08:57,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:08:57,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 08:08:57,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-11-07 08:08:57,022 INFO L87 Difference]: Start difference. First operand 76 states and 80 transitions. Second operand has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:57,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:08:57,070 INFO L93 Difference]: Finished difference Result 128 states and 136 transitions. [2021-11-07 08:08:57,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 08:08:57,071 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 75 [2021-11-07 08:08:57,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:08:57,071 INFO L225 Difference]: With dead ends: 128 [2021-11-07 08:08:57,072 INFO L226 Difference]: Without dead ends: 79 [2021-11-07 08:08:57,072 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-11-07 08:08:57,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-11-07 08:08:57,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2021-11-07 08:08:57,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.0649350649350648) internal successors, (82), 77 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:57,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 82 transitions. [2021-11-07 08:08:57,077 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 82 transitions. Word has length 75 [2021-11-07 08:08:57,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:08:57,077 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 82 transitions. [2021-11-07 08:08:57,077 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.25) internal successors, (52), 16 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:57,078 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 82 transitions. [2021-11-07 08:08:57,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-11-07 08:08:57,078 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:08:57,079 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:08:57,118 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-07 08:08:57,293 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-07 08:08:57,293 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:08:57,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:08:57,294 INFO L85 PathProgramCache]: Analyzing trace with hash -1574617224, now seen corresponding path program 14 times [2021-11-07 08:08:57,294 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:08:57,294 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729694215] [2021-11-07 08:08:57,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:08:57,294 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:08:57,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:08:57,460 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-07 08:08:57,460 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:08:57,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729694215] [2021-11-07 08:08:57,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [729694215] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:08:57,460 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238392988] [2021-11-07 08:08:57,460 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:08:57,461 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:08:57,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:08:57,462 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:08:57,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-07 08:08:57,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:08:57,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:08:57,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 08:08:57,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:08:57,940 INFO L134 CoverageAnalysis]: Checked inductivity of 242 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-07 08:08:57,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238392988] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:08:57,941 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:08:57,941 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-11-07 08:08:57,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626432872] [2021-11-07 08:08:57,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-07 08:08:57,942 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:08:57,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-07 08:08:57,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-07 08:08:57,943 INFO L87 Difference]: Start difference. First operand 78 states and 82 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:57,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:08:57,980 INFO L93 Difference]: Finished difference Result 130 states and 138 transitions. [2021-11-07 08:08:57,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 08:08:57,981 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2021-11-07 08:08:57,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:08:57,982 INFO L225 Difference]: With dead ends: 130 [2021-11-07 08:08:57,982 INFO L226 Difference]: Without dead ends: 81 [2021-11-07 08:08:57,983 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-07 08:08:57,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-11-07 08:08:57,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2021-11-07 08:08:57,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0632911392405062) internal successors, (84), 79 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:57,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 84 transitions. [2021-11-07 08:08:57,987 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 84 transitions. Word has length 77 [2021-11-07 08:08:57,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:08:57,987 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 84 transitions. [2021-11-07 08:08:57,987 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:57,988 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 84 transitions. [2021-11-07 08:08:57,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-11-07 08:08:57,988 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:08:57,989 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 5, 5, 4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:08:58,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-07 08:08:58,209 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-07 08:08:58,210 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:08:58,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:08:58,210 INFO L85 PathProgramCache]: Analyzing trace with hash 907193782, now seen corresponding path program 15 times [2021-11-07 08:08:58,210 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:08:58,210 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873060149] [2021-11-07 08:08:58,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:08:58,211 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:08:58,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:08:58,432 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 73 trivial. 0 not checked. [2021-11-07 08:08:58,433 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:08:58,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873060149] [2021-11-07 08:08:58,433 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1873060149] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:08:58,433 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1150314575] [2021-11-07 08:08:58,434 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:08:58,434 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:08:58,434 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:08:58,435 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:08:58,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-07 08:08:58,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-07 08:08:58,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:08:58,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 08:08:58,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:08:59,041 INFO L134 CoverageAnalysis]: Checked inductivity of 269 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-11-07 08:08:59,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1150314575] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:08:59,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:08:59,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 7] total 22 [2021-11-07 08:08:59,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1094684222] [2021-11-07 08:08:59,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-07 08:08:59,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:08:59,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-07 08:08:59,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-11-07 08:08:59,044 INFO L87 Difference]: Start difference. First operand 80 states and 84 transitions. Second operand has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:59,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:08:59,181 INFO L93 Difference]: Finished difference Result 141 states and 152 transitions. [2021-11-07 08:08:59,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 08:08:59,182 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2021-11-07 08:08:59,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:08:59,183 INFO L225 Difference]: With dead ends: 141 [2021-11-07 08:08:59,183 INFO L226 Difference]: Without dead ends: 92 [2021-11-07 08:08:59,184 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-11-07 08:08:59,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-07 08:08:59,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 88. [2021-11-07 08:08:59,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.0574712643678161) internal successors, (92), 87 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:59,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 92 transitions. [2021-11-07 08:08:59,189 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 92 transitions. Word has length 79 [2021-11-07 08:08:59,190 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:08:59,190 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 92 transitions. [2021-11-07 08:08:59,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 3.0454545454545454) internal successors, (67), 22 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:08:59,191 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 92 transitions. [2021-11-07 08:08:59,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-11-07 08:08:59,192 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:08:59,192 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:08:59,239 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-07 08:08:59,405 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-07 08:08:59,406 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:08:59,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:08:59,406 INFO L85 PathProgramCache]: Analyzing trace with hash -457297038, now seen corresponding path program 16 times [2021-11-07 08:08:59,406 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:08:59,406 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1309130745] [2021-11-07 08:08:59,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:08:59,407 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:08:59,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:08:59,658 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-07 08:08:59,658 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:08:59,658 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1309130745] [2021-11-07 08:08:59,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1309130745] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:08:59,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [692390335] [2021-11-07 08:08:59,659 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:08:59,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:08:59,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:08:59,662 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:08:59,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-07 08:09:00,086 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:09:00,086 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:09:00,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 289 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 08:09:00,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:09:00,372 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-07 08:09:00,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [692390335] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:09:00,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:09:00,373 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-11-07 08:09:00,373 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1195439789] [2021-11-07 08:09:00,374 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-07 08:09:00,375 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:00,375 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-07 08:09:00,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-11-07 08:09:00,376 INFO L87 Difference]: Start difference. First operand 88 states and 92 transitions. Second operand has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:00,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:00,438 INFO L93 Difference]: Finished difference Result 146 states and 154 transitions. [2021-11-07 08:09:00,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 08:09:00,439 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 87 [2021-11-07 08:09:00,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:00,440 INFO L225 Difference]: With dead ends: 146 [2021-11-07 08:09:00,440 INFO L226 Difference]: Without dead ends: 91 [2021-11-07 08:09:00,441 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-11-07 08:09:00,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-11-07 08:09:00,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2021-11-07 08:09:00,446 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0561797752808988) internal successors, (94), 89 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:00,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 94 transitions. [2021-11-07 08:09:00,447 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 94 transitions. Word has length 87 [2021-11-07 08:09:00,447 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:00,447 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 94 transitions. [2021-11-07 08:09:00,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 19 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:00,448 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 94 transitions. [2021-11-07 08:09:00,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-11-07 08:09:00,449 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:00,449 INFO L513 BasicCegarLoop]: trace histogram [16, 16, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:00,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-07 08:09:00,666 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:00,667 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:09:00,667 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:00,667 INFO L85 PathProgramCache]: Analyzing trace with hash -2002949072, now seen corresponding path program 17 times [2021-11-07 08:09:00,667 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:00,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [833279861] [2021-11-07 08:09:00,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:00,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:00,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:00,909 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-07 08:09:00,909 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:00,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [833279861] [2021-11-07 08:09:00,910 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [833279861] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:09:00,910 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998534101] [2021-11-07 08:09:00,910 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:09:00,910 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:00,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:09:00,912 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:09:00,914 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-07 08:09:01,881 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 17 check-sat command(s) [2021-11-07 08:09:01,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:09:01,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-07 08:09:01,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:09:02,107 INFO L134 CoverageAnalysis]: Checked inductivity of 356 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-07 08:09:02,107 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998534101] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:09:02,107 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:09:02,108 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-11-07 08:09:02,108 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631242601] [2021-11-07 08:09:02,108 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-07 08:09:02,109 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:02,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-07 08:09:02,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-11-07 08:09:02,110 INFO L87 Difference]: Start difference. First operand 90 states and 94 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:02,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:02,151 INFO L93 Difference]: Finished difference Result 148 states and 156 transitions. [2021-11-07 08:09:02,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 08:09:02,151 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2021-11-07 08:09:02,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:02,152 INFO L225 Difference]: With dead ends: 148 [2021-11-07 08:09:02,152 INFO L226 Difference]: Without dead ends: 93 [2021-11-07 08:09:02,153 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-11-07 08:09:02,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-11-07 08:09:02,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2021-11-07 08:09:02,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.054945054945055) internal successors, (96), 91 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:02,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 96 transitions. [2021-11-07 08:09:02,157 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 96 transitions. Word has length 89 [2021-11-07 08:09:02,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:02,157 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 96 transitions. [2021-11-07 08:09:02,158 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:02,158 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 96 transitions. [2021-11-07 08:09:02,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-11-07 08:09:02,159 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:02,159 INFO L513 BasicCegarLoop]: trace histogram [17, 17, 5, 5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:02,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-07 08:09:02,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:02,381 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:09:02,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:02,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1315869330, now seen corresponding path program 18 times [2021-11-07 08:09:02,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:02,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185370586] [2021-11-07 08:09:02,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:02,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:02,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:02,623 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-07 08:09:02,623 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:02,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185370586] [2021-11-07 08:09:02,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185370586] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:09:02,624 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462600627] [2021-11-07 08:09:02,624 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:09:02,624 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:02,625 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:09:02,626 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:09:02,655 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-07 08:09:03,427 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2021-11-07 08:09:03,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:09:03,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 08:09:03,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:09:03,686 INFO L134 CoverageAnalysis]: Checked inductivity of 389 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 364 trivial. 0 not checked. [2021-11-07 08:09:03,686 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [462600627] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:09:03,686 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:09:03,686 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 8] total 26 [2021-11-07 08:09:03,686 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109769240] [2021-11-07 08:09:03,687 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-07 08:09:03,687 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:03,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-07 08:09:03,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-11-07 08:09:03,688 INFO L87 Difference]: Start difference. First operand 92 states and 96 transitions. Second operand has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:03,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:03,807 INFO L93 Difference]: Finished difference Result 159 states and 170 transitions. [2021-11-07 08:09:03,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-07 08:09:03,807 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 91 [2021-11-07 08:09:03,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:03,808 INFO L225 Difference]: With dead ends: 159 [2021-11-07 08:09:03,808 INFO L226 Difference]: Without dead ends: 104 [2021-11-07 08:09:03,809 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2021-11-07 08:09:03,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-07 08:09:03,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 100. [2021-11-07 08:09:03,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.0505050505050506) internal successors, (104), 99 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:03,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 104 transitions. [2021-11-07 08:09:03,814 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 104 transitions. Word has length 91 [2021-11-07 08:09:03,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:03,814 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 104 transitions. [2021-11-07 08:09:03,814 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 3.423076923076923) internal successors, (89), 26 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:03,814 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 104 transitions. [2021-11-07 08:09:03,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-11-07 08:09:03,815 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:03,816 INFO L513 BasicCegarLoop]: trace histogram [18, 18, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:03,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-07 08:09:04,029 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:04,030 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:09:04,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:04,030 INFO L85 PathProgramCache]: Analyzing trace with hash 1310358570, now seen corresponding path program 19 times [2021-11-07 08:09:04,030 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:04,030 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [86386508] [2021-11-07 08:09:04,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:04,030 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:04,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:04,274 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-11-07 08:09:04,274 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:04,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [86386508] [2021-11-07 08:09:04,274 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [86386508] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:09:04,274 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1066358913] [2021-11-07 08:09:04,274 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:09:04,274 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:04,275 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:09:04,278 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:09:04,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-07 08:09:04,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:04,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 08:09:04,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:09:04,950 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-11-07 08:09:04,950 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1066358913] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:09:04,950 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:09:04,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-11-07 08:09:04,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546790750] [2021-11-07 08:09:04,951 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-07 08:09:04,951 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:04,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-07 08:09:04,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-11-07 08:09:04,952 INFO L87 Difference]: Start difference. First operand 100 states and 104 transitions. Second operand has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:05,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:05,019 INFO L93 Difference]: Finished difference Result 164 states and 172 transitions. [2021-11-07 08:09:05,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-07 08:09:05,020 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 99 [2021-11-07 08:09:05,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:05,021 INFO L225 Difference]: With dead ends: 164 [2021-11-07 08:09:05,021 INFO L226 Difference]: Without dead ends: 103 [2021-11-07 08:09:05,022 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-11-07 08:09:05,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-11-07 08:09:05,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2021-11-07 08:09:05,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.0495049504950495) internal successors, (106), 101 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:05,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 106 transitions. [2021-11-07 08:09:05,027 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 106 transitions. Word has length 99 [2021-11-07 08:09:05,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:05,027 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 106 transitions. [2021-11-07 08:09:05,027 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.909090909090909) internal successors, (64), 22 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:05,027 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 106 transitions. [2021-11-07 08:09:05,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-11-07 08:09:05,029 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:05,029 INFO L513 BasicCegarLoop]: trace histogram [19, 19, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:05,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-07 08:09:05,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:05,242 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:09:05,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:05,242 INFO L85 PathProgramCache]: Analyzing trace with hash -903575576, now seen corresponding path program 20 times [2021-11-07 08:09:05,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:05,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554824329] [2021-11-07 08:09:05,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:05,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:05,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:05,493 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-11-07 08:09:05,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:05,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554824329] [2021-11-07 08:09:05,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554824329] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:09:05,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893296226] [2021-11-07 08:09:05,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:09:05,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:05,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:09:05,495 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:09:05,496 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-07 08:09:05,872 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:09:05,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:09:05,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 328 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 08:09:05,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:09:06,134 INFO L134 CoverageAnalysis]: Checked inductivity of 494 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-11-07 08:09:06,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893296226] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:09:06,134 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:09:06,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-11-07 08:09:06,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343291827] [2021-11-07 08:09:06,135 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-07 08:09:06,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:06,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-07 08:09:06,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-11-07 08:09:06,136 INFO L87 Difference]: Start difference. First operand 102 states and 106 transitions. Second operand has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:06,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:06,211 INFO L93 Difference]: Finished difference Result 166 states and 174 transitions. [2021-11-07 08:09:06,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 08:09:06,212 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2021-11-07 08:09:06,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:06,212 INFO L225 Difference]: With dead ends: 166 [2021-11-07 08:09:06,212 INFO L226 Difference]: Without dead ends: 105 [2021-11-07 08:09:06,213 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-11-07 08:09:06,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-11-07 08:09:06,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2021-11-07 08:09:06,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.0485436893203883) internal successors, (108), 103 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:06,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 108 transitions. [2021-11-07 08:09:06,216 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 108 transitions. Word has length 101 [2021-11-07 08:09:06,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:06,217 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 108 transitions. [2021-11-07 08:09:06,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:06,217 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 108 transitions. [2021-11-07 08:09:06,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-11-07 08:09:06,217 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:06,218 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:06,250 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-07 08:09:06,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-07 08:09:06,437 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:09:06,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:06,438 INFO L85 PathProgramCache]: Analyzing trace with hash 1809488934, now seen corresponding path program 21 times [2021-11-07 08:09:06,438 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:06,438 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572243481] [2021-11-07 08:09:06,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:06,438 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:06,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:06,710 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-11-07 08:09:06,711 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:06,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572243481] [2021-11-07 08:09:06,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572243481] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:09:06,711 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [701094782] [2021-11-07 08:09:06,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:09:06,711 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:06,711 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:09:06,717 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:09:06,737 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-07 08:09:07,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-07 08:09:07,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:09:07,471 INFO L263 TraceCheckSpWp]: Trace formula consists of 229 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 08:09:07,473 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:09:07,780 INFO L134 CoverageAnalysis]: Checked inductivity of 533 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 508 trivial. 0 not checked. [2021-11-07 08:09:07,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [701094782] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:09:07,780 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:09:07,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 8] total 29 [2021-11-07 08:09:07,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540019635] [2021-11-07 08:09:07,781 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-07 08:09:07,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:07,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-07 08:09:07,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=280, Invalid=532, Unknown=0, NotChecked=0, Total=812 [2021-11-07 08:09:07,782 INFO L87 Difference]: Start difference. First operand 104 states and 108 transitions. Second operand has 29 states, 29 states have (on average 3.1379310344827585) internal successors, (91), 29 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:07,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:07,875 INFO L93 Difference]: Finished difference Result 171 states and 180 transitions. [2021-11-07 08:09:07,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-07 08:09:07,876 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.1379310344827585) internal successors, (91), 29 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2021-11-07 08:09:07,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:07,877 INFO L225 Difference]: With dead ends: 171 [2021-11-07 08:09:07,877 INFO L226 Difference]: Without dead ends: 110 [2021-11-07 08:09:07,878 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=280, Invalid=532, Unknown=0, NotChecked=0, Total=812 [2021-11-07 08:09:07,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-07 08:09:07,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 108. [2021-11-07 08:09:07,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.0467289719626167) internal successors, (112), 107 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:07,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 112 transitions. [2021-11-07 08:09:07,883 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 112 transitions. Word has length 103 [2021-11-07 08:09:07,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:07,883 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 112 transitions. [2021-11-07 08:09:07,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.1379310344827585) internal successors, (91), 29 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:07,884 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 112 transitions. [2021-11-07 08:09:07,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-11-07 08:09:07,885 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:07,885 INFO L513 BasicCegarLoop]: trace histogram [21, 21, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:07,914 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2021-11-07 08:09:08,105 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-07 08:09:08,105 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:09:08,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:08,106 INFO L85 PathProgramCache]: Analyzing trace with hash 676687458, now seen corresponding path program 22 times [2021-11-07 08:09:08,106 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:08,106 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632794430] [2021-11-07 08:09:08,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:08,106 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:08,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:08,359 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-07 08:09:08,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:08,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632794430] [2021-11-07 08:09:08,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632794430] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:09:08,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821096389] [2021-11-07 08:09:08,359 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:09:08,359 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:08,360 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:09:08,360 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:09:08,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-07 08:09:08,853 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:09:08,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:09:08,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-07 08:09:08,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:09:09,165 INFO L134 CoverageAnalysis]: Checked inductivity of 585 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-07 08:09:09,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821096389] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:09:09,166 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:09:09,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-11-07 08:09:09,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605906858] [2021-11-07 08:09:09,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-07 08:09:09,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:09,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-07 08:09:09,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-07 08:09:09,168 INFO L87 Difference]: Start difference. First operand 108 states and 112 transitions. Second operand has 25 states, 25 states have (on average 2.8) internal successors, (70), 25 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:09,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:09,244 INFO L93 Difference]: Finished difference Result 174 states and 182 transitions. [2021-11-07 08:09:09,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 08:09:09,245 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.8) internal successors, (70), 25 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2021-11-07 08:09:09,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:09,246 INFO L225 Difference]: With dead ends: 174 [2021-11-07 08:09:09,246 INFO L226 Difference]: Without dead ends: 111 [2021-11-07 08:09:09,247 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-07 08:09:09,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2021-11-07 08:09:09,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 110. [2021-11-07 08:09:09,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.0458715596330275) internal successors, (114), 109 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:09,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 114 transitions. [2021-11-07 08:09:09,258 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 114 transitions. Word has length 107 [2021-11-07 08:09:09,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:09,259 INFO L470 AbstractCegarLoop]: Abstraction has 110 states and 114 transitions. [2021-11-07 08:09:09,259 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.8) internal successors, (70), 25 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:09,259 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 114 transitions. [2021-11-07 08:09:09,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 110 [2021-11-07 08:09:09,260 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:09,261 INFO L513 BasicCegarLoop]: trace histogram [22, 22, 6, 6, 6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:09,295 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-07 08:09:09,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-07 08:09:09,461 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:09:09,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:09,462 INFO L85 PathProgramCache]: Analyzing trace with hash -168895456, now seen corresponding path program 23 times [2021-11-07 08:09:09,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:09,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748676603] [2021-11-07 08:09:09,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:09,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:09,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:09,837 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 144 trivial. 0 not checked. [2021-11-07 08:09:09,838 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:09,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748676603] [2021-11-07 08:09:09,838 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1748676603] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:09:09,838 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [884630628] [2021-11-07 08:09:09,838 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:09:09,839 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:09,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:09:09,854 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:09:09,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-07 08:09:14,386 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2021-11-07 08:09:14,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:09:14,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 08:09:14,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:09:14,735 INFO L134 CoverageAnalysis]: Checked inductivity of 628 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 592 trivial. 0 not checked. [2021-11-07 08:09:14,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [884630628] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:09:14,736 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:09:14,736 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 9] total 32 [2021-11-07 08:09:14,736 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517826826] [2021-11-07 08:09:14,737 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-07 08:09:14,737 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:14,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-07 08:09:14,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2021-11-07 08:09:14,738 INFO L87 Difference]: Start difference. First operand 110 states and 114 transitions. Second operand has 32 states, 32 states have (on average 3.15625) internal successors, (101), 32 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:14,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:14,896 INFO L93 Difference]: Finished difference Result 185 states and 196 transitions. [2021-11-07 08:09:14,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-07 08:09:14,897 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 3.15625) internal successors, (101), 32 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 109 [2021-11-07 08:09:14,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:14,900 INFO L225 Difference]: With dead ends: 185 [2021-11-07 08:09:14,900 INFO L226 Difference]: Without dead ends: 122 [2021-11-07 08:09:14,900 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 133 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=335, Invalid=657, Unknown=0, NotChecked=0, Total=992 [2021-11-07 08:09:14,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-07 08:09:14,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 118. [2021-11-07 08:09:14,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.0427350427350428) internal successors, (122), 117 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:14,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 122 transitions. [2021-11-07 08:09:14,914 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 122 transitions. Word has length 109 [2021-11-07 08:09:14,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:14,914 INFO L470 AbstractCegarLoop]: Abstraction has 118 states and 122 transitions. [2021-11-07 08:09:14,914 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 3.15625) internal successors, (101), 32 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:14,915 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 122 transitions. [2021-11-07 08:09:14,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-11-07 08:09:14,915 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:14,916 INFO L513 BasicCegarLoop]: trace histogram [23, 23, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:14,944 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-07 08:09:15,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:15,126 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:09:15,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:15,126 INFO L85 PathProgramCache]: Analyzing trace with hash -375494436, now seen corresponding path program 24 times [2021-11-07 08:09:15,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:15,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58208716] [2021-11-07 08:09:15,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:15,127 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:15,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:15,475 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 183 trivial. 0 not checked. [2021-11-07 08:09:15,475 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:15,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58208716] [2021-11-07 08:09:15,476 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58208716] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:09:15,476 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748259373] [2021-11-07 08:09:15,476 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:09:15,476 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:15,477 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:09:15,477 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:09:15,502 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-07 08:09:16,581 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-07 08:09:16,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:09:16,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 08:09:16,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:09:16,883 INFO L134 CoverageAnalysis]: Checked inductivity of 712 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 676 trivial. 0 not checked. [2021-11-07 08:09:16,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748259373] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:09:16,883 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:09:16,884 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 9] total 33 [2021-11-07 08:09:16,884 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63156818] [2021-11-07 08:09:16,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-07 08:09:16,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:16,885 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-07 08:09:16,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=360, Invalid=696, Unknown=0, NotChecked=0, Total=1056 [2021-11-07 08:09:16,886 INFO L87 Difference]: Start difference. First operand 118 states and 122 transitions. Second operand has 33 states, 33 states have (on average 3.0) internal successors, (99), 33 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:17,000 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:17,000 INFO L93 Difference]: Finished difference Result 193 states and 202 transitions. [2021-11-07 08:09:17,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-07 08:09:17,001 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.0) internal successors, (99), 33 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-11-07 08:09:17,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:17,004 INFO L225 Difference]: With dead ends: 193 [2021-11-07 08:09:17,004 INFO L226 Difference]: Without dead ends: 124 [2021-11-07 08:09:17,005 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 111 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=360, Invalid=696, Unknown=0, NotChecked=0, Total=1056 [2021-11-07 08:09:17,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-07 08:09:17,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 122. [2021-11-07 08:09:17,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 1.0413223140495869) internal successors, (126), 121 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:17,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 126 transitions. [2021-11-07 08:09:17,027 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 126 transitions. Word has length 117 [2021-11-07 08:09:17,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:17,055 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 126 transitions. [2021-11-07 08:09:17,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.0) internal successors, (99), 33 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:17,055 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 126 transitions. [2021-11-07 08:09:17,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 122 [2021-11-07 08:09:17,056 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:17,056 INFO L513 BasicCegarLoop]: trace histogram [24, 24, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:17,092 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-07 08:09:17,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-07 08:09:17,257 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:09:17,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:17,257 INFO L85 PathProgramCache]: Analyzing trace with hash 26792216, now seen corresponding path program 25 times [2021-11-07 08:09:17,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:17,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120952884] [2021-11-07 08:09:17,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:17,257 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:17,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:17,646 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-11-07 08:09:17,647 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:17,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120952884] [2021-11-07 08:09:17,647 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120952884] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:09:17,647 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800988155] [2021-11-07 08:09:17,647 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:09:17,647 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:17,647 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:09:17,650 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:09:17,665 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-07 08:09:18,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:18,271 INFO L263 TraceCheckSpWp]: Trace formula consists of 381 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-07 08:09:18,274 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:09:18,535 INFO L134 CoverageAnalysis]: Checked inductivity of 772 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-11-07 08:09:18,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800988155] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:09:18,536 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:09:18,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-11-07 08:09:18,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2127891756] [2021-11-07 08:09:18,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-07 08:09:18,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:18,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-07 08:09:18,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-11-07 08:09:18,537 INFO L87 Difference]: Start difference. First operand 122 states and 126 transitions. Second operand has 28 states, 28 states have (on average 2.7142857142857144) internal successors, (76), 28 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:18,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:18,591 INFO L93 Difference]: Finished difference Result 196 states and 204 transitions. [2021-11-07 08:09:18,591 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-07 08:09:18,591 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.7142857142857144) internal successors, (76), 28 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 121 [2021-11-07 08:09:18,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:18,592 INFO L225 Difference]: With dead ends: 196 [2021-11-07 08:09:18,592 INFO L226 Difference]: Without dead ends: 125 [2021-11-07 08:09:18,592 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-11-07 08:09:18,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-07 08:09:18,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 124. [2021-11-07 08:09:18,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.0406504065040652) internal successors, (128), 123 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:18,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 128 transitions. [2021-11-07 08:09:18,597 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 128 transitions. Word has length 121 [2021-11-07 08:09:18,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:18,597 INFO L470 AbstractCegarLoop]: Abstraction has 124 states and 128 transitions. [2021-11-07 08:09:18,598 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.7142857142857144) internal successors, (76), 28 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:18,598 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 128 transitions. [2021-11-07 08:09:18,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-11-07 08:09:18,599 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:18,599 INFO L513 BasicCegarLoop]: trace histogram [25, 25, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:18,630 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-11-07 08:09:18,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-07 08:09:18,813 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:09:18,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:18,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1400350122, now seen corresponding path program 26 times [2021-11-07 08:09:18,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:18,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848746626] [2021-11-07 08:09:18,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:18,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:18,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:19,202 INFO L134 CoverageAnalysis]: Checked inductivity of 821 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-11-07 08:09:19,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:19,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848746626] [2021-11-07 08:09:19,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848746626] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:09:19,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385277858] [2021-11-07 08:09:19,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:09:19,203 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:19,203 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:09:19,206 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:09:19,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-07 08:09:19,834 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:09:19,834 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:09:19,836 INFO L263 TraceCheckSpWp]: Trace formula consists of 387 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-07 08:09:19,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:09:20,123 INFO L134 CoverageAnalysis]: Checked inductivity of 821 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-11-07 08:09:20,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1385277858] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:09:20,123 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:09:20,128 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-11-07 08:09:20,128 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1790952648] [2021-11-07 08:09:20,129 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-07 08:09:20,129 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:20,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-07 08:09:20,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-11-07 08:09:20,158 INFO L87 Difference]: Start difference. First operand 124 states and 128 transitions. Second operand has 29 states, 29 states have (on average 2.689655172413793) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:20,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:20,278 INFO L93 Difference]: Finished difference Result 198 states and 206 transitions. [2021-11-07 08:09:20,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-07 08:09:20,279 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.689655172413793) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-11-07 08:09:20,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:20,280 INFO L225 Difference]: With dead ends: 198 [2021-11-07 08:09:20,280 INFO L226 Difference]: Without dead ends: 127 [2021-11-07 08:09:20,281 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 123 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-11-07 08:09:20,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-11-07 08:09:20,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2021-11-07 08:09:20,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.04) internal successors, (130), 125 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:20,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 130 transitions. [2021-11-07 08:09:20,286 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 130 transitions. Word has length 123 [2021-11-07 08:09:20,287 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:20,287 INFO L470 AbstractCegarLoop]: Abstraction has 126 states and 130 transitions. [2021-11-07 08:09:20,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.689655172413793) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:20,287 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 130 transitions. [2021-11-07 08:09:20,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2021-11-07 08:09:20,288 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:20,288 INFO L513 BasicCegarLoop]: trace histogram [26, 26, 7, 7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:20,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-07 08:09:20,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-07 08:09:20,497 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:09:20,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:20,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1505397780, now seen corresponding path program 27 times [2021-11-07 08:09:20,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:20,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462472921] [2021-11-07 08:09:20,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:20,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:20,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:20,946 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2021-11-07 08:09:20,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:20,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462472921] [2021-11-07 08:09:20,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462472921] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:09:20,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1936208392] [2021-11-07 08:09:20,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:09:20,947 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:20,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:09:20,948 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:09:20,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-07 08:09:21,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-07 08:09:21,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:09:21,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 08:09:21,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:09:22,299 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 823 trivial. 0 not checked. [2021-11-07 08:09:22,299 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1936208392] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:09:22,299 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:09:22,300 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 10] total 37 [2021-11-07 08:09:22,300 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139394842] [2021-11-07 08:09:22,300 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-07 08:09:22,300 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:22,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-07 08:09:22,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=450, Invalid=882, Unknown=0, NotChecked=0, Total=1332 [2021-11-07 08:09:22,302 INFO L87 Difference]: Start difference. First operand 126 states and 130 transitions. Second operand has 37 states, 37 states have (on average 2.7567567567567566) internal successors, (102), 37 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:22,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:22,442 INFO L93 Difference]: Finished difference Result 209 states and 220 transitions. [2021-11-07 08:09:22,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-07 08:09:22,442 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.7567567567567566) internal successors, (102), 37 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2021-11-07 08:09:22,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:22,443 INFO L225 Difference]: With dead ends: 209 [2021-11-07 08:09:22,443 INFO L226 Difference]: Without dead ends: 138 [2021-11-07 08:09:22,444 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 153 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=450, Invalid=882, Unknown=0, NotChecked=0, Total=1332 [2021-11-07 08:09:22,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-07 08:09:22,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 134. [2021-11-07 08:09:22,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.037593984962406) internal successors, (138), 133 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:22,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 138 transitions. [2021-11-07 08:09:22,448 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 138 transitions. Word has length 125 [2021-11-07 08:09:22,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:22,448 INFO L470 AbstractCegarLoop]: Abstraction has 134 states and 138 transitions. [2021-11-07 08:09:22,448 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.7567567567567566) internal successors, (102), 37 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:22,449 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 138 transitions. [2021-11-07 08:09:22,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2021-11-07 08:09:22,450 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:22,450 INFO L513 BasicCegarLoop]: trace histogram [27, 27, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:22,475 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-07 08:09:22,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:22,653 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:09:22,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:22,654 INFO L85 PathProgramCache]: Analyzing trace with hash 328643792, now seen corresponding path program 28 times [2021-11-07 08:09:22,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:22,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991853369] [2021-11-07 08:09:22,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:22,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:22,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:23,087 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2021-11-07 08:09:23,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:23,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991853369] [2021-11-07 08:09:23,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991853369] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:09:23,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [125921521] [2021-11-07 08:09:23,088 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:09:23,088 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:23,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:09:23,089 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:09:23,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-07 08:09:23,729 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:09:23,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:09:23,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 414 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-07 08:09:23,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:09:24,055 INFO L134 CoverageAnalysis]: Checked inductivity of 970 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2021-11-07 08:09:24,055 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [125921521] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:09:24,056 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:09:24,056 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-11-07 08:09:24,056 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977350103] [2021-11-07 08:09:24,056 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-07 08:09:24,057 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:24,057 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-07 08:09:24,058 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-11-07 08:09:24,058 INFO L87 Difference]: Start difference. First operand 134 states and 138 transitions. Second operand has 31 states, 31 states have (on average 2.6451612903225805) internal successors, (82), 31 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:24,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:24,154 INFO L93 Difference]: Finished difference Result 214 states and 222 transitions. [2021-11-07 08:09:24,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-07 08:09:24,158 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.6451612903225805) internal successors, (82), 31 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 133 [2021-11-07 08:09:24,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:24,159 INFO L225 Difference]: With dead ends: 214 [2021-11-07 08:09:24,159 INFO L226 Difference]: Without dead ends: 137 [2021-11-07 08:09:24,160 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 133 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-11-07 08:09:24,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2021-11-07 08:09:24,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2021-11-07 08:09:24,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.037037037037037) internal successors, (140), 135 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:24,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 140 transitions. [2021-11-07 08:09:24,166 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 140 transitions. Word has length 133 [2021-11-07 08:09:24,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:24,166 INFO L470 AbstractCegarLoop]: Abstraction has 136 states and 140 transitions. [2021-11-07 08:09:24,167 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.6451612903225805) internal successors, (82), 31 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:24,167 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 140 transitions. [2021-11-07 08:09:24,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-11-07 08:09:24,168 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:24,168 INFO L513 BasicCegarLoop]: trace histogram [28, 28, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:24,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-07 08:09:24,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:24,381 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:09:24,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:24,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1304669938, now seen corresponding path program 29 times [2021-11-07 08:09:24,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:24,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870649793] [2021-11-07 08:09:24,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:24,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:24,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:24,905 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 241 trivial. 0 not checked. [2021-11-07 08:09:24,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:24,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870649793] [2021-11-07 08:09:24,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870649793] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:09:24,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470822196] [2021-11-07 08:09:24,906 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:09:24,906 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:24,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:09:24,910 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:09:24,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-07 08:09:30,171 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2021-11-07 08:09:30,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:09:30,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 08:09:30,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:09:30,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1025 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 961 trivial. 0 not checked. [2021-11-07 08:09:30,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1470822196] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:09:30,610 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:09:30,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 11] total 40 [2021-11-07 08:09:30,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2111677506] [2021-11-07 08:09:30,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-07 08:09:30,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:30,612 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-07 08:09:30,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=519, Invalid=1041, Unknown=0, NotChecked=0, Total=1560 [2021-11-07 08:09:30,613 INFO L87 Difference]: Start difference. First operand 136 states and 140 transitions. Second operand has 40 states, 40 states have (on average 2.925) internal successors, (117), 40 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:30,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:30,786 INFO L93 Difference]: Finished difference Result 225 states and 236 transitions. [2021-11-07 08:09:30,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-07 08:09:30,786 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.925) internal successors, (117), 40 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-11-07 08:09:30,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:30,788 INFO L225 Difference]: With dead ends: 225 [2021-11-07 08:09:30,788 INFO L226 Difference]: Without dead ends: 148 [2021-11-07 08:09:30,789 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 165 GetRequests, 127 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=519, Invalid=1041, Unknown=0, NotChecked=0, Total=1560 [2021-11-07 08:09:30,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-11-07 08:09:30,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 144. [2021-11-07 08:09:30,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.034965034965035) internal successors, (148), 143 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:30,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 148 transitions. [2021-11-07 08:09:30,794 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 148 transitions. Word has length 135 [2021-11-07 08:09:30,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:30,796 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 148 transitions. [2021-11-07 08:09:30,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.925) internal successors, (117), 40 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:30,797 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 148 transitions. [2021-11-07 08:09:30,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2021-11-07 08:09:30,798 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:30,798 INFO L513 BasicCegarLoop]: trace histogram [29, 29, 9, 9, 9, 9, 9, 9, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:30,843 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-07 08:09:31,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-07 08:09:31,017 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:09:31,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:31,018 INFO L85 PathProgramCache]: Analyzing trace with hash -580558646, now seen corresponding path program 30 times [2021-11-07 08:09:31,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:31,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453249126] [2021-11-07 08:09:31,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:31,018 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:31,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:31,527 INFO L134 CoverageAnalysis]: Checked inductivity of 1133 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 292 trivial. 0 not checked. [2021-11-07 08:09:31,527 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:31,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453249126] [2021-11-07 08:09:31,528 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453249126] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:09:31,528 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118680993] [2021-11-07 08:09:31,528 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:09:31,528 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:31,528 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:09:31,529 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:09:31,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-07 08:09:35,075 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 15 check-sat command(s) [2021-11-07 08:09:35,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:09:35,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 321 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 08:09:35,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:09:35,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1133 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 1084 trivial. 0 not checked. [2021-11-07 08:09:35,559 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118680993] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:09:35,559 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:09:35,559 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 10] total 40 [2021-11-07 08:09:35,559 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025902797] [2021-11-07 08:09:35,560 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-07 08:09:35,560 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:35,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-07 08:09:35,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=540, Invalid=1020, Unknown=0, NotChecked=0, Total=1560 [2021-11-07 08:09:35,561 INFO L87 Difference]: Start difference. First operand 144 states and 148 transitions. Second operand has 40 states, 40 states have (on average 2.825) internal successors, (113), 40 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:35,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:35,668 INFO L93 Difference]: Finished difference Result 233 states and 242 transitions. [2021-11-07 08:09:35,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-07 08:09:35,673 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.825) internal successors, (113), 40 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2021-11-07 08:09:35,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:35,674 INFO L225 Difference]: With dead ends: 233 [2021-11-07 08:09:35,674 INFO L226 Difference]: Without dead ends: 150 [2021-11-07 08:09:35,675 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=540, Invalid=1020, Unknown=0, NotChecked=0, Total=1560 [2021-11-07 08:09:35,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-07 08:09:35,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 148. [2021-11-07 08:09:35,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.034013605442177) internal successors, (152), 147 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:35,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 152 transitions. [2021-11-07 08:09:35,691 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 152 transitions. Word has length 143 [2021-11-07 08:09:35,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:35,692 INFO L470 AbstractCegarLoop]: Abstraction has 148 states and 152 transitions. [2021-11-07 08:09:35,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.825) internal successors, (113), 40 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:35,692 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 152 transitions. [2021-11-07 08:09:35,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2021-11-07 08:09:35,693 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:35,694 INFO L513 BasicCegarLoop]: trace histogram [30, 30, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:35,739 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-07 08:09:35,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-07 08:09:35,909 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:09:35,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:35,909 INFO L85 PathProgramCache]: Analyzing trace with hash 922342406, now seen corresponding path program 31 times [2021-11-07 08:09:35,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:35,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1090679643] [2021-11-07 08:09:35,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:35,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:35,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:36,417 INFO L134 CoverageAnalysis]: Checked inductivity of 1207 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2021-11-07 08:09:36,418 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:36,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1090679643] [2021-11-07 08:09:36,418 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1090679643] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:09:36,418 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924704930] [2021-11-07 08:09:36,419 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:09:36,419 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:36,419 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:09:36,420 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:09:36,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-07 08:09:37,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:37,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 451 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-07 08:09:37,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:09:37,515 INFO L134 CoverageAnalysis]: Checked inductivity of 1207 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2021-11-07 08:09:37,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924704930] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:09:37,515 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:09:37,515 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-11-07 08:09:37,515 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707341039] [2021-11-07 08:09:37,516 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-07 08:09:37,516 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:37,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-07 08:09:37,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-11-07 08:09:37,517 INFO L87 Difference]: Start difference. First operand 148 states and 152 transitions. Second operand has 34 states, 34 states have (on average 2.588235294117647) internal successors, (88), 34 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:37,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:37,599 INFO L93 Difference]: Finished difference Result 236 states and 244 transitions. [2021-11-07 08:09:37,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-07 08:09:37,607 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.588235294117647) internal successors, (88), 34 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 147 [2021-11-07 08:09:37,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:37,609 INFO L225 Difference]: With dead ends: 236 [2021-11-07 08:09:37,609 INFO L226 Difference]: Without dead ends: 151 [2021-11-07 08:09:37,618 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 147 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-11-07 08:09:37,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-07 08:09:37,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2021-11-07 08:09:37,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.0335570469798658) internal successors, (154), 149 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:37,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 154 transitions. [2021-11-07 08:09:37,622 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 154 transitions. Word has length 147 [2021-11-07 08:09:37,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:37,622 INFO L470 AbstractCegarLoop]: Abstraction has 150 states and 154 transitions. [2021-11-07 08:09:37,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.588235294117647) internal successors, (88), 34 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:37,622 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 154 transitions. [2021-11-07 08:09:37,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2021-11-07 08:09:37,623 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:37,623 INFO L513 BasicCegarLoop]: trace histogram [31, 31, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:37,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-07 08:09:37,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:37,824 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:09:37,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:37,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1220684740, now seen corresponding path program 32 times [2021-11-07 08:09:37,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:37,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106185871] [2021-11-07 08:09:37,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:37,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:37,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:38,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1268 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2021-11-07 08:09:38,354 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:38,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106185871] [2021-11-07 08:09:38,355 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106185871] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:09:38,355 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616332805] [2021-11-07 08:09:38,355 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:09:38,355 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:38,355 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:09:38,358 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:09:38,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-07 08:09:39,153 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:09:39,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:09:39,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 457 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-07 08:09:39,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:09:39,518 INFO L134 CoverageAnalysis]: Checked inductivity of 1268 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2021-11-07 08:09:39,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616332805] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:09:39,518 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:09:39,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-11-07 08:09:39,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138037912] [2021-11-07 08:09:39,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-07 08:09:39,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:39,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-07 08:09:39,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 08:09:39,520 INFO L87 Difference]: Start difference. First operand 150 states and 154 transitions. Second operand has 35 states, 35 states have (on average 2.5714285714285716) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:39,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:39,636 INFO L93 Difference]: Finished difference Result 238 states and 246 transitions. [2021-11-07 08:09:39,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-07 08:09:39,638 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.5714285714285716) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2021-11-07 08:09:39,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:39,639 INFO L225 Difference]: With dead ends: 238 [2021-11-07 08:09:39,639 INFO L226 Difference]: Without dead ends: 153 [2021-11-07 08:09:39,640 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 149 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 08:09:39,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2021-11-07 08:09:39,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2021-11-07 08:09:39,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.033112582781457) internal successors, (156), 151 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:39,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 156 transitions. [2021-11-07 08:09:39,645 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 156 transitions. Word has length 149 [2021-11-07 08:09:39,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:39,652 INFO L470 AbstractCegarLoop]: Abstraction has 152 states and 156 transitions. [2021-11-07 08:09:39,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.5714285714285716) internal successors, (90), 35 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:39,652 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 156 transitions. [2021-11-07 08:09:39,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2021-11-07 08:09:39,653 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:39,653 INFO L513 BasicCegarLoop]: trace histogram [32, 32, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:39,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-07 08:09:39,869 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:39,869 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:09:39,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:39,870 INFO L85 PathProgramCache]: Analyzing trace with hash 164858882, now seen corresponding path program 33 times [2021-11-07 08:09:39,870 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:39,870 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2144302307] [2021-11-07 08:09:39,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:39,870 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:39,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:40,508 INFO L134 CoverageAnalysis]: Checked inductivity of 1331 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 307 trivial. 0 not checked. [2021-11-07 08:09:40,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:40,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2144302307] [2021-11-07 08:09:40,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2144302307] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:09:40,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022607399] [2021-11-07 08:09:40,509 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:09:40,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:40,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:09:40,511 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:09:40,529 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-07 08:09:41,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-11-07 08:09:41,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:09:41,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 304 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 08:09:41,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:09:42,189 INFO L134 CoverageAnalysis]: Checked inductivity of 1331 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 1267 trivial. 0 not checked. [2021-11-07 08:09:42,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022607399] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:09:42,190 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:09:42,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 11] total 44 [2021-11-07 08:09:42,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204114197] [2021-11-07 08:09:42,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-07 08:09:42,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:42,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-07 08:09:42,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=649, Invalid=1243, Unknown=0, NotChecked=0, Total=1892 [2021-11-07 08:09:42,192 INFO L87 Difference]: Start difference. First operand 152 states and 156 transitions. Second operand has 44 states, 44 states have (on average 2.75) internal successors, (121), 44 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:42,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:42,329 INFO L93 Difference]: Finished difference Result 243 states and 252 transitions. [2021-11-07 08:09:42,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-07 08:09:42,329 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.75) internal successors, (121), 44 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 151 [2021-11-07 08:09:42,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:42,331 INFO L225 Difference]: With dead ends: 243 [2021-11-07 08:09:42,331 INFO L226 Difference]: Without dead ends: 158 [2021-11-07 08:09:42,332 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 143 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=649, Invalid=1243, Unknown=0, NotChecked=0, Total=1892 [2021-11-07 08:09:42,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-07 08:09:42,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 156. [2021-11-07 08:09:42,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.032258064516129) internal successors, (160), 155 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:42,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 160 transitions. [2021-11-07 08:09:42,339 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 160 transitions. Word has length 151 [2021-11-07 08:09:42,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:42,339 INFO L470 AbstractCegarLoop]: Abstraction has 156 states and 160 transitions. [2021-11-07 08:09:42,340 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.75) internal successors, (121), 44 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:42,340 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 160 transitions. [2021-11-07 08:09:42,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2021-11-07 08:09:42,341 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:42,341 INFO L513 BasicCegarLoop]: trace histogram [33, 33, 9, 9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:42,387 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-07 08:09:42,561 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:42,561 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:09:42,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:42,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1300368578, now seen corresponding path program 34 times [2021-11-07 08:09:42,562 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:42,562 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272342680] [2021-11-07 08:09:42,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:42,562 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:42,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:43,215 INFO L134 CoverageAnalysis]: Checked inductivity of 1413 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 324 trivial. 0 not checked. [2021-11-07 08:09:43,215 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:43,215 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272342680] [2021-11-07 08:09:43,215 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [272342680] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:09:43,216 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570429838] [2021-11-07 08:09:43,216 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:09:43,216 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:43,216 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:09:43,217 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:09:43,217 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-07 08:09:44,095 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:09:44,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:09:44,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 473 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 08:09:44,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:09:44,589 INFO L134 CoverageAnalysis]: Checked inductivity of 1413 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1332 trivial. 0 not checked. [2021-11-07 08:09:44,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570429838] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:09:44,589 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:09:44,589 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 12] total 46 [2021-11-07 08:09:44,589 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645617628] [2021-11-07 08:09:44,590 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-07 08:09:44,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:09:44,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-07 08:09:44,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=695, Invalid=1375, Unknown=0, NotChecked=0, Total=2070 [2021-11-07 08:09:44,592 INFO L87 Difference]: Start difference. First operand 156 states and 160 transitions. Second operand has 46 states, 46 states have (on average 2.8043478260869565) internal successors, (129), 46 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:44,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:09:44,773 INFO L93 Difference]: Finished difference Result 255 states and 266 transitions. [2021-11-07 08:09:44,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-07 08:09:44,774 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.8043478260869565) internal successors, (129), 46 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 155 [2021-11-07 08:09:44,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:09:44,774 INFO L225 Difference]: With dead ends: 255 [2021-11-07 08:09:44,775 INFO L226 Difference]: Without dead ends: 168 [2021-11-07 08:09:44,775 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=695, Invalid=1375, Unknown=0, NotChecked=0, Total=2070 [2021-11-07 08:09:44,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-11-07 08:09:44,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 164. [2021-11-07 08:09:44,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.030674846625767) internal successors, (168), 163 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:44,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 168 transitions. [2021-11-07 08:09:44,780 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 168 transitions. Word has length 155 [2021-11-07 08:09:44,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:09:44,781 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 168 transitions. [2021-11-07 08:09:44,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.8043478260869565) internal successors, (129), 46 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:09:44,781 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 168 transitions. [2021-11-07 08:09:44,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2021-11-07 08:09:44,782 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:09:44,782 INFO L513 BasicCegarLoop]: trace histogram [34, 34, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:09:44,809 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-11-07 08:09:44,993 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-07 08:09:44,993 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:09:44,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:09:44,994 INFO L85 PathProgramCache]: Analyzing trace with hash -1569164806, now seen corresponding path program 35 times [2021-11-07 08:09:44,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:09:44,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239295602] [2021-11-07 08:09:44,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:09:44,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:09:45,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:09:45,706 INFO L134 CoverageAnalysis]: Checked inductivity of 1537 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 381 trivial. 0 not checked. [2021-11-07 08:09:45,706 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:09:45,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239295602] [2021-11-07 08:09:45,707 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239295602] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:09:45,707 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373382484] [2021-11-07 08:09:45,707 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:09:45,707 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:09:45,707 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:09:45,708 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:09:45,710 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-07 08:10:43,099 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 35 check-sat command(s) [2021-11-07 08:10:43,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:10:43,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 494 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 08:10:43,167 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:43,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1537 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1437 trivial. 0 not checked. [2021-11-07 08:10:43,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373382484] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:43,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:10:43,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 13] total 48 [2021-11-07 08:10:43,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544690872] [2021-11-07 08:10:43,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-07 08:10:43,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:43,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-07 08:10:43,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=1513, Unknown=0, NotChecked=0, Total=2256 [2021-11-07 08:10:43,640 INFO L87 Difference]: Start difference. First operand 164 states and 168 transitions. Second operand has 48 states, 48 states have (on average 2.5833333333333335) internal successors, (124), 48 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:10:43,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:43,851 INFO L93 Difference]: Finished difference Result 269 states and 280 transitions. [2021-11-07 08:10:43,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-07 08:10:43,852 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.5833333333333335) internal successors, (124), 48 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 163 [2021-11-07 08:10:43,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:43,853 INFO L225 Difference]: With dead ends: 269 [2021-11-07 08:10:43,853 INFO L226 Difference]: Without dead ends: 176 [2021-11-07 08:10:43,854 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 153 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 374 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=743, Invalid=1513, Unknown=0, NotChecked=0, Total=2256 [2021-11-07 08:10:43,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-11-07 08:10:43,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 172. [2021-11-07 08:10:43,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 172 states, 171 states have (on average 1.0292397660818713) internal successors, (176), 171 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:10:43,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 176 transitions. [2021-11-07 08:10:43,857 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 176 transitions. Word has length 163 [2021-11-07 08:10:43,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:43,857 INFO L470 AbstractCegarLoop]: Abstraction has 172 states and 176 transitions. [2021-11-07 08:10:43,857 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.5833333333333335) internal successors, (124), 48 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:10:43,858 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 176 transitions. [2021-11-07 08:10:43,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 172 [2021-11-07 08:10:43,858 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:43,858 INFO L513 BasicCegarLoop]: trace histogram [35, 35, 11, 11, 11, 11, 11, 11, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:43,893 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-11-07 08:10:44,059 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-07 08:10:44,059 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:10:44,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:44,059 INFO L85 PathProgramCache]: Analyzing trace with hash -768084554, now seen corresponding path program 36 times [2021-11-07 08:10:44,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:44,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183502507] [2021-11-07 08:10:44,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:44,060 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:44,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:44,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1669 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 444 trivial. 0 not checked. [2021-11-07 08:10:44,712 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:44,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183502507] [2021-11-07 08:10:44,712 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183502507] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:44,712 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [939604911] [2021-11-07 08:10:44,712 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:10:44,712 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:44,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:44,713 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:44,736 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-07 08:10:50,044 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-11-07 08:10:50,044 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:10:50,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 08:10:50,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:50,568 INFO L134 CoverageAnalysis]: Checked inductivity of 1669 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 1588 trivial. 0 not checked. [2021-11-07 08:10:50,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [939604911] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:50,568 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:10:50,568 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 12] total 48 [2021-11-07 08:10:50,568 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959901732] [2021-11-07 08:10:50,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-07 08:10:50,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:50,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-07 08:10:50,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=768, Invalid=1488, Unknown=0, NotChecked=0, Total=2256 [2021-11-07 08:10:50,570 INFO L87 Difference]: Start difference. First operand 172 states and 176 transitions. Second operand has 48 states, 48 states have (on average 2.6875) internal successors, (129), 48 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:10:50,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:50,667 INFO L93 Difference]: Finished difference Result 277 states and 286 transitions. [2021-11-07 08:10:50,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-07 08:10:50,669 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.6875) internal successors, (129), 48 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 171 [2021-11-07 08:10:50,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:50,670 INFO L225 Difference]: With dead ends: 277 [2021-11-07 08:10:50,670 INFO L226 Difference]: Without dead ends: 178 [2021-11-07 08:10:50,671 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=768, Invalid=1488, Unknown=0, NotChecked=0, Total=2256 [2021-11-07 08:10:50,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-07 08:10:50,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 176. [2021-11-07 08:10:50,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.0285714285714285) internal successors, (180), 175 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:10:50,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 180 transitions. [2021-11-07 08:10:50,695 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 180 transitions. Word has length 171 [2021-11-07 08:10:50,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:50,696 INFO L470 AbstractCegarLoop]: Abstraction has 176 states and 180 transitions. [2021-11-07 08:10:50,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.6875) internal successors, (129), 48 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:10:50,696 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 180 transitions. [2021-11-07 08:10:50,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2021-11-07 08:10:50,697 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:50,697 INFO L513 BasicCegarLoop]: trace histogram [36, 36, 11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:50,742 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-07 08:10:50,913 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-07 08:10:50,913 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:10:50,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:50,914 INFO L85 PathProgramCache]: Analyzing trace with hash -1357540110, now seen corresponding path program 37 times [2021-11-07 08:10:50,914 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:50,914 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140133367] [2021-11-07 08:10:50,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:50,914 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:50,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:51,531 INFO L134 CoverageAnalysis]: Checked inductivity of 1759 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 463 trivial. 0 not checked. [2021-11-07 08:10:51,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:51,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140133367] [2021-11-07 08:10:51,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140133367] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:51,532 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112645386] [2021-11-07 08:10:51,532 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:10:51,532 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:51,532 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:51,533 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:51,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-07 08:10:52,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:52,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-07 08:10:52,553 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:52,916 INFO L134 CoverageAnalysis]: Checked inductivity of 1759 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 463 trivial. 0 not checked. [2021-11-07 08:10:52,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1112645386] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:52,916 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:10:52,916 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-11-07 08:10:52,917 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677944366] [2021-11-07 08:10:52,917 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-07 08:10:52,917 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:52,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-07 08:10:52,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-11-07 08:10:52,919 INFO L87 Difference]: Start difference. First operand 176 states and 180 transitions. Second operand has 40 states, 40 states have (on average 2.5) internal successors, (100), 40 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:10:53,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:53,024 INFO L93 Difference]: Finished difference Result 280 states and 288 transitions. [2021-11-07 08:10:53,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-07 08:10:53,024 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.5) internal successors, (100), 40 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 175 [2021-11-07 08:10:53,025 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:53,026 INFO L225 Difference]: With dead ends: 280 [2021-11-07 08:10:53,026 INFO L226 Difference]: Without dead ends: 179 [2021-11-07 08:10:53,027 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 213 GetRequests, 175 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-11-07 08:10:53,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2021-11-07 08:10:53,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 178. [2021-11-07 08:10:53,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 177 states have (on average 1.0282485875706215) internal successors, (182), 177 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:10:53,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 182 transitions. [2021-11-07 08:10:53,032 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 182 transitions. Word has length 175 [2021-11-07 08:10:53,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:53,033 INFO L470 AbstractCegarLoop]: Abstraction has 178 states and 182 transitions. [2021-11-07 08:10:53,033 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.5) internal successors, (100), 40 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:10:53,033 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 182 transitions. [2021-11-07 08:10:53,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 178 [2021-11-07 08:10:53,034 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:53,034 INFO L513 BasicCegarLoop]: trace histogram [37, 37, 11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:53,075 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-11-07 08:10:53,245 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-07 08:10:53,245 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:10:53,246 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:53,246 INFO L85 PathProgramCache]: Analyzing trace with hash -1798241360, now seen corresponding path program 38 times [2021-11-07 08:10:53,246 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:53,246 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854423] [2021-11-07 08:10:53,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:53,246 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:53,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:54,033 INFO L134 CoverageAnalysis]: Checked inductivity of 1832 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 463 trivial. 0 not checked. [2021-11-07 08:10:54,033 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:54,033 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854423] [2021-11-07 08:10:54,034 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854423] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:54,034 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489828049] [2021-11-07 08:10:54,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:10:54,034 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:54,034 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:54,038 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:54,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-07 08:10:55,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:10:55,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:10:55,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 531 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-07 08:10:55,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:55,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1832 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 463 trivial. 0 not checked. [2021-11-07 08:10:55,502 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1489828049] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:55,502 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:10:55,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2021-11-07 08:10:55,503 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677896004] [2021-11-07 08:10:55,503 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-07 08:10:55,503 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:55,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-07 08:10:55,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-11-07 08:10:55,505 INFO L87 Difference]: Start difference. First operand 178 states and 182 transitions. Second operand has 41 states, 41 states have (on average 2.4878048780487805) internal successors, (102), 41 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:10:55,590 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:55,590 INFO L93 Difference]: Finished difference Result 282 states and 290 transitions. [2021-11-07 08:10:55,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-07 08:10:55,591 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.4878048780487805) internal successors, (102), 41 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 177 [2021-11-07 08:10:55,591 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:55,592 INFO L225 Difference]: With dead ends: 282 [2021-11-07 08:10:55,592 INFO L226 Difference]: Without dead ends: 181 [2021-11-07 08:10:55,593 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 216 GetRequests, 177 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-11-07 08:10:55,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-07 08:10:55,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 180. [2021-11-07 08:10:55,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.0279329608938548) internal successors, (184), 179 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:10:55,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 184 transitions. [2021-11-07 08:10:55,600 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 184 transitions. Word has length 177 [2021-11-07 08:10:55,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:55,600 INFO L470 AbstractCegarLoop]: Abstraction has 180 states and 184 transitions. [2021-11-07 08:10:55,600 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.4878048780487805) internal successors, (102), 41 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:10:55,601 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 184 transitions. [2021-11-07 08:10:55,602 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2021-11-07 08:10:55,602 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:55,602 INFO L513 BasicCegarLoop]: trace histogram [38, 38, 11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:55,640 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-07 08:10:55,825 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:55,825 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:10:55,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:55,826 INFO L85 PathProgramCache]: Analyzing trace with hash -110380306, now seen corresponding path program 39 times [2021-11-07 08:10:55,826 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:55,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455384372] [2021-11-07 08:10:55,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:55,826 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:55,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:56,545 INFO L134 CoverageAnalysis]: Checked inductivity of 1907 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 463 trivial. 0 not checked. [2021-11-07 08:10:56,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:56,545 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455384372] [2021-11-07 08:10:56,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [455384372] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:56,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885562371] [2021-11-07 08:10:56,546 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:10:56,546 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:56,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:56,547 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:56,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-07 08:10:58,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2021-11-07 08:10:58,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:10:58,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 08:10:58,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:10:58,823 INFO L134 CoverageAnalysis]: Checked inductivity of 1907 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 1807 trivial. 0 not checked. [2021-11-07 08:10:58,823 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885562371] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:58,823 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:10:58,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 13] total 52 [2021-11-07 08:10:58,828 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774943957] [2021-11-07 08:10:58,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-07 08:10:58,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:10:58,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-07 08:10:58,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=897, Invalid=1755, Unknown=0, NotChecked=0, Total=2652 [2021-11-07 08:10:58,831 INFO L87 Difference]: Start difference. First operand 180 states and 184 transitions. Second operand has 52 states, 52 states have (on average 2.6346153846153846) internal successors, (137), 52 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:10:58,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:10:58,942 INFO L93 Difference]: Finished difference Result 287 states and 296 transitions. [2021-11-07 08:10:58,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-07 08:10:58,942 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.6346153846153846) internal successors, (137), 52 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 179 [2021-11-07 08:10:58,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:10:58,943 INFO L225 Difference]: With dead ends: 287 [2021-11-07 08:10:58,944 INFO L226 Difference]: Without dead ends: 186 [2021-11-07 08:10:58,945 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 219 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 418 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=897, Invalid=1755, Unknown=0, NotChecked=0, Total=2652 [2021-11-07 08:10:58,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-11-07 08:10:58,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 184. [2021-11-07 08:10:58,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 1.0273224043715847) internal successors, (188), 183 states have internal predecessors, (188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:10:58,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 188 transitions. [2021-11-07 08:10:58,950 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 188 transitions. Word has length 179 [2021-11-07 08:10:58,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:10:58,950 INFO L470 AbstractCegarLoop]: Abstraction has 184 states and 188 transitions. [2021-11-07 08:10:58,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.6346153846153846) internal successors, (137), 52 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:10:58,951 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 188 transitions. [2021-11-07 08:10:58,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 184 [2021-11-07 08:10:58,952 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:10:58,952 INFO L513 BasicCegarLoop]: trace histogram [39, 39, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:10:58,988 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-07 08:10:59,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-11-07 08:10:59,165 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:10:59,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:10:59,166 INFO L85 PathProgramCache]: Analyzing trace with hash 2006568490, now seen corresponding path program 40 times [2021-11-07 08:10:59,166 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:10:59,166 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795470196] [2021-11-07 08:10:59,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:10:59,166 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:10:59,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:10:59,827 INFO L134 CoverageAnalysis]: Checked inductivity of 2005 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-11-07 08:10:59,827 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:10:59,827 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795470196] [2021-11-07 08:10:59,827 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795470196] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:10:59,828 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018452880] [2021-11-07 08:10:59,828 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:10:59,828 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:10:59,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:10:59,829 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:10:59,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-07 08:11:01,020 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:11:01,020 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:11:01,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-07 08:11:01,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:11:01,394 INFO L134 CoverageAnalysis]: Checked inductivity of 2005 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 484 trivial. 0 not checked. [2021-11-07 08:11:01,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018452880] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:11:01,394 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:11:01,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2021-11-07 08:11:01,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1257518939] [2021-11-07 08:11:01,395 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-07 08:11:01,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:11:01,397 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-07 08:11:01,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-11-07 08:11:01,397 INFO L87 Difference]: Start difference. First operand 184 states and 188 transitions. Second operand has 43 states, 43 states have (on average 2.4651162790697674) internal successors, (106), 43 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:11:01,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:11:01,492 INFO L93 Difference]: Finished difference Result 289 states and 297 transitions. [2021-11-07 08:11:01,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-07 08:11:01,493 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.4651162790697674) internal successors, (106), 43 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 183 [2021-11-07 08:11:01,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:11:01,494 INFO L225 Difference]: With dead ends: 289 [2021-11-07 08:11:01,495 INFO L226 Difference]: Without dead ends: 186 [2021-11-07 08:11:01,495 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 183 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-11-07 08:11:01,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-11-07 08:11:01,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 186. [2021-11-07 08:11:01,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.027027027027027) internal successors, (190), 185 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:11:01,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 190 transitions. [2021-11-07 08:11:01,501 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 190 transitions. Word has length 183 [2021-11-07 08:11:01,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:11:01,501 INFO L470 AbstractCegarLoop]: Abstraction has 186 states and 190 transitions. [2021-11-07 08:11:01,501 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.4651162790697674) internal successors, (106), 43 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:11:01,501 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 190 transitions. [2021-11-07 08:11:01,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2021-11-07 08:11:01,503 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:11:01,503 INFO L513 BasicCegarLoop]: trace histogram [40, 40, 11, 11, 11, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:11:01,541 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-11-07 08:11:01,729 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:11:01,729 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:11:01,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:11:01,730 INFO L85 PathProgramCache]: Analyzing trace with hash -456024344, now seen corresponding path program 41 times [2021-11-07 08:11:01,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:11:01,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843031981] [2021-11-07 08:11:01,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:11:01,730 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:11:01,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:11:01,873 INFO L134 CoverageAnalysis]: Checked inductivity of 2084 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2021-11-07 08:11:01,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:11:01,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843031981] [2021-11-07 08:11:01,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843031981] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:11:01,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661388469] [2021-11-07 08:11:01,875 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:11:01,875 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:11:01,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:11:01,877 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:11:01,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-07 08:13:30,085 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 41 check-sat command(s) [2021-11-07 08:13:30,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:13:30,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 553 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 08:13:30,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:13:30,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2084 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 1963 trivial. 0 not checked. [2021-11-07 08:13:30,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [661388469] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:13:30,602 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:13:30,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-11-07 08:13:30,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145583037] [2021-11-07 08:13:30,602 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 08:13:30,602 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:13:30,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 08:13:30,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-11-07 08:13:30,603 INFO L87 Difference]: Start difference. First operand 186 states and 190 transitions. Second operand has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:30,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:13:30,690 INFO L93 Difference]: Finished difference Result 274 states and 283 transitions. [2021-11-07 08:13:30,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 08:13:30,690 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 185 [2021-11-07 08:13:30,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:13:30,691 INFO L225 Difference]: With dead ends: 274 [2021-11-07 08:13:30,691 INFO L226 Difference]: Without dead ends: 195 [2021-11-07 08:13:30,692 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 185 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-11-07 08:13:30,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2021-11-07 08:13:30,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 192. [2021-11-07 08:13:30,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 1.0261780104712042) internal successors, (196), 191 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:30,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 196 transitions. [2021-11-07 08:13:30,698 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 196 transitions. Word has length 185 [2021-11-07 08:13:30,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:13:30,698 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 196 transitions. [2021-11-07 08:13:30,699 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 5.066666666666666) internal successors, (76), 15 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:30,699 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 196 transitions. [2021-11-07 08:13:30,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2021-11-07 08:13:30,700 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:13:30,700 INFO L513 BasicCegarLoop]: trace histogram [40, 40, 12, 12, 12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:13:30,760 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-11-07 08:13:30,920 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:13:30,921 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:13:30,921 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:13:30,921 INFO L85 PathProgramCache]: Analyzing trace with hash 1454751974, now seen corresponding path program 42 times [2021-11-07 08:13:30,921 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:13:30,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678897224] [2021-11-07 08:13:30,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:13:30,921 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:13:30,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:31,094 INFO L134 CoverageAnalysis]: Checked inductivity of 2153 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 2009 trivial. 0 not checked. [2021-11-07 08:13:31,094 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:13:31,094 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678897224] [2021-11-07 08:13:31,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678897224] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:13:31,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424233105] [2021-11-07 08:13:31,095 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:13:31,095 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:13:31,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:13:31,096 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:13:31,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-07 08:13:46,208 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2021-11-07 08:13:46,208 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:13:46,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 08:13:46,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:13:46,779 INFO L134 CoverageAnalysis]: Checked inductivity of 2153 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 2032 trivial. 0 not checked. [2021-11-07 08:13:46,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424233105] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:13:46,780 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:13:46,780 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 27 [2021-11-07 08:13:46,780 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272593113] [2021-11-07 08:13:46,780 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-07 08:13:46,780 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:13:46,781 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-07 08:13:46,781 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2021-11-07 08:13:46,781 INFO L87 Difference]: Start difference. First operand 192 states and 196 transitions. Second operand has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 27 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:46,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:13:46,914 INFO L93 Difference]: Finished difference Result 287 states and 297 transitions. [2021-11-07 08:13:46,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-07 08:13:46,915 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 27 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 191 [2021-11-07 08:13:46,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:13:46,916 INFO L225 Difference]: With dead ends: 287 [2021-11-07 08:13:46,916 INFO L226 Difference]: Without dead ends: 204 [2021-11-07 08:13:46,916 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 205 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2021-11-07 08:13:46,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-11-07 08:13:46,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 200. [2021-11-07 08:13:46,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.0251256281407035) internal successors, (204), 199 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:46,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 204 transitions. [2021-11-07 08:13:46,922 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 204 transitions. Word has length 191 [2021-11-07 08:13:46,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:13:46,922 INFO L470 AbstractCegarLoop]: Abstraction has 200 states and 204 transitions. [2021-11-07 08:13:46,923 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.074074074074074) internal successors, (83), 27 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:46,923 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 204 transitions. [2021-11-07 08:13:46,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2021-11-07 08:13:46,924 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:13:46,924 INFO L513 BasicCegarLoop]: trace histogram [40, 40, 13, 13, 13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:13:46,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-07 08:13:47,137 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:13:47,137 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:13:47,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:13:47,138 INFO L85 PathProgramCache]: Analyzing trace with hash -1362128414, now seen corresponding path program 43 times [2021-11-07 08:13:47,138 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:13:47,138 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082780863] [2021-11-07 08:13:47,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:13:47,138 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:13:47,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:47,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2251 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 2082 trivial. 0 not checked. [2021-11-07 08:13:47,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:13:47,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082780863] [2021-11-07 08:13:47,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082780863] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:13:47,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2047049933] [2021-11-07 08:13:47,309 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:13:47,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:13:47,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:13:47,311 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:13:47,326 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-07 08:13:48,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:48,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 587 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 08:13:48,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:13:49,003 INFO L134 CoverageAnalysis]: Checked inductivity of 2251 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 2082 trivial. 0 not checked. [2021-11-07 08:13:49,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2047049933] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:13:49,004 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:13:49,004 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-11-07 08:13:49,004 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989208539] [2021-11-07 08:13:49,004 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-07 08:13:49,004 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:13:49,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-07 08:13:49,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-07 08:13:49,005 INFO L87 Difference]: Start difference. First operand 200 states and 204 transitions. Second operand has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:49,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:13:49,106 INFO L93 Difference]: Finished difference Result 298 states and 307 transitions. [2021-11-07 08:13:49,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 08:13:49,107 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 199 [2021-11-07 08:13:49,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:13:49,108 INFO L225 Difference]: With dead ends: 298 [2021-11-07 08:13:49,108 INFO L226 Difference]: Without dead ends: 209 [2021-11-07 08:13:49,108 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-07 08:13:49,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2021-11-07 08:13:49,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 206. [2021-11-07 08:13:49,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 1.024390243902439) internal successors, (210), 205 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:49,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 210 transitions. [2021-11-07 08:13:49,113 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 210 transitions. Word has length 199 [2021-11-07 08:13:49,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:13:49,113 INFO L470 AbstractCegarLoop]: Abstraction has 206 states and 210 transitions. [2021-11-07 08:13:49,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.176470588235294) internal successors, (54), 17 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:49,114 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 210 transitions. [2021-11-07 08:13:49,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 206 [2021-11-07 08:13:49,115 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:13:49,115 INFO L513 BasicCegarLoop]: trace histogram [40, 40, 14, 14, 14, 14, 14, 14, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:13:49,142 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-11-07 08:13:49,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-11-07 08:13:49,326 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:13:49,326 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:13:49,326 INFO L85 PathProgramCache]: Analyzing trace with hash -1245442208, now seen corresponding path program 44 times [2021-11-07 08:13:49,326 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:13:49,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703099469] [2021-11-07 08:13:49,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:13:49,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:13:49,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:49,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2332 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2136 trivial. 0 not checked. [2021-11-07 08:13:49,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:13:49,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703099469] [2021-11-07 08:13:49,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703099469] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:13:49,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52939862] [2021-11-07 08:13:49,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:13:49,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:13:49,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:13:49,521 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:13:49,537 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-07 08:13:51,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:13:51,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:13:51,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 602 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 08:13:51,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:13:51,385 INFO L134 CoverageAnalysis]: Checked inductivity of 2332 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2136 trivial. 0 not checked. [2021-11-07 08:13:51,386 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52939862] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:13:51,386 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:13:51,386 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-11-07 08:13:51,386 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210690862] [2021-11-07 08:13:51,386 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 08:13:51,386 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:13:51,387 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 08:13:51,387 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-11-07 08:13:51,387 INFO L87 Difference]: Start difference. First operand 206 states and 210 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:51,495 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:13:51,495 INFO L93 Difference]: Finished difference Result 308 states and 317 transitions. [2021-11-07 08:13:51,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 08:13:51,496 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 205 [2021-11-07 08:13:51,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:13:51,497 INFO L225 Difference]: With dead ends: 308 [2021-11-07 08:13:51,497 INFO L226 Difference]: Without dead ends: 215 [2021-11-07 08:13:51,498 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-11-07 08:13:51,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2021-11-07 08:13:51,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 212. [2021-11-07 08:13:51,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.0236966824644549) internal successors, (216), 211 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:51,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 216 transitions. [2021-11-07 08:13:51,502 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 216 transitions. Word has length 205 [2021-11-07 08:13:51,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:13:51,503 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 216 transitions. [2021-11-07 08:13:51,503 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:51,503 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 216 transitions. [2021-11-07 08:13:51,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2021-11-07 08:13:51,504 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:13:51,504 INFO L513 BasicCegarLoop]: trace histogram [40, 40, 15, 15, 15, 15, 15, 15, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:13:51,529 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-07 08:13:51,704 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-07 08:13:51,705 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:13:51,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:13:51,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1465783902, now seen corresponding path program 45 times [2021-11-07 08:13:51,705 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:13:51,705 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964727598] [2021-11-07 08:13:51,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:13:51,705 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:13:51,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:51,908 INFO L134 CoverageAnalysis]: Checked inductivity of 2419 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 2194 trivial. 0 not checked. [2021-11-07 08:13:51,908 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:13:51,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964727598] [2021-11-07 08:13:51,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964727598] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:13:51,908 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391320859] [2021-11-07 08:13:51,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:13:51,909 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:13:51,909 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:13:51,910 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:13:51,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-07 08:13:54,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 13 check-sat command(s) [2021-11-07 08:13:54,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:13:54,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 08:13:54,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:13:55,220 INFO L134 CoverageAnalysis]: Checked inductivity of 2419 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 2275 trivial. 0 not checked. [2021-11-07 08:13:55,220 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1391320859] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:13:55,220 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:13:55,221 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 15] total 31 [2021-11-07 08:13:55,221 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793365561] [2021-11-07 08:13:55,221 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-07 08:13:55,221 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:13:55,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-07 08:13:55,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2021-11-07 08:13:55,222 INFO L87 Difference]: Start difference. First operand 212 states and 216 transitions. Second operand has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 31 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:55,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:13:55,382 INFO L93 Difference]: Finished difference Result 321 states and 331 transitions. [2021-11-07 08:13:55,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-07 08:13:55,383 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 31 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 211 [2021-11-07 08:13:55,383 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:13:55,384 INFO L225 Difference]: With dead ends: 321 [2021-11-07 08:13:55,384 INFO L226 Difference]: Without dead ends: 224 [2021-11-07 08:13:55,384 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 199 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2021-11-07 08:13:55,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-11-07 08:13:55,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 220. [2021-11-07 08:13:55,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 220 states, 219 states have (on average 1.0228310502283104) internal successors, (224), 219 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:55,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 220 states to 220 states and 224 transitions. [2021-11-07 08:13:55,391 INFO L78 Accepts]: Start accepts. Automaton has 220 states and 224 transitions. Word has length 211 [2021-11-07 08:13:55,392 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:13:55,392 INFO L470 AbstractCegarLoop]: Abstraction has 220 states and 224 transitions. [2021-11-07 08:13:55,392 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.935483870967742) internal successors, (91), 31 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:55,392 INFO L276 IsEmpty]: Start isEmpty. Operand 220 states and 224 transitions. [2021-11-07 08:13:55,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 220 [2021-11-07 08:13:55,393 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:13:55,394 INFO L513 BasicCegarLoop]: trace histogram [40, 40, 16, 16, 16, 16, 16, 16, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:13:55,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-11-07 08:13:55,609 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-07 08:13:55,609 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:13:55,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:13:55,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1998414246, now seen corresponding path program 46 times [2021-11-07 08:13:55,610 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:13:55,610 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208014290] [2021-11-07 08:13:55,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:13:55,610 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:13:55,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:55,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2537 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 2281 trivial. 0 not checked. [2021-11-07 08:13:55,832 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:13:55,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208014290] [2021-11-07 08:13:55,832 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208014290] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:13:55,832 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685407576] [2021-11-07 08:13:55,832 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:13:55,833 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:13:55,833 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:13:55,834 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:13:55,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-07 08:13:57,326 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:13:57,326 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:13:57,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 636 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-07 08:13:57,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:13:57,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2537 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 2281 trivial. 0 not checked. [2021-11-07 08:13:57,748 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685407576] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:13:57,748 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:13:57,748 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-11-07 08:13:57,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291179018] [2021-11-07 08:13:57,749 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-07 08:13:57,749 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:13:57,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-07 08:13:57,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-11-07 08:13:57,750 INFO L87 Difference]: Start difference. First operand 220 states and 224 transitions. Second operand has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:57,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:13:57,918 INFO L93 Difference]: Finished difference Result 332 states and 341 transitions. [2021-11-07 08:13:57,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 08:13:57,918 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 219 [2021-11-07 08:13:57,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:13:57,920 INFO L225 Difference]: With dead ends: 332 [2021-11-07 08:13:57,920 INFO L226 Difference]: Without dead ends: 229 [2021-11-07 08:13:57,920 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 237 GetRequests, 219 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-11-07 08:13:57,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2021-11-07 08:13:57,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 226. [2021-11-07 08:13:57,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.0222222222222221) internal successors, (230), 225 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:57,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 230 transitions. [2021-11-07 08:13:57,926 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 230 transitions. Word has length 219 [2021-11-07 08:13:57,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:13:57,927 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 230 transitions. [2021-11-07 08:13:57,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 3.0) internal successors, (60), 20 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:13:57,927 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 230 transitions. [2021-11-07 08:13:57,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 226 [2021-11-07 08:13:57,928 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:13:57,929 INFO L513 BasicCegarLoop]: trace histogram [40, 40, 17, 17, 17, 17, 17, 17, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:13:57,973 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-11-07 08:13:58,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-07 08:13:58,141 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:13:58,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:13:58,142 INFO L85 PathProgramCache]: Analyzing trace with hash 79773912, now seen corresponding path program 47 times [2021-11-07 08:13:58,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:13:58,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056721887] [2021-11-07 08:13:58,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:13:58,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:13:58,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:13:58,412 INFO L134 CoverageAnalysis]: Checked inductivity of 2636 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 2347 trivial. 0 not checked. [2021-11-07 08:13:58,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:13:58,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056721887] [2021-11-07 08:13:58,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056721887] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:13:58,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209710378] [2021-11-07 08:13:58,413 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:13:58,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:13:58,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:13:58,414 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:13:58,429 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-07 08:17:32,788 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 41 check-sat command(s) [2021-11-07 08:17:32,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:17:32,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 651 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 08:17:32,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:17:33,444 INFO L134 CoverageAnalysis]: Checked inductivity of 2636 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 2347 trivial. 0 not checked. [2021-11-07 08:17:33,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1209710378] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:17:33,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:17:33,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-11-07 08:17:33,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102781143] [2021-11-07 08:17:33,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-07 08:17:33,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:17:33,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-07 08:17:33,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-11-07 08:17:33,445 INFO L87 Difference]: Start difference. First operand 226 states and 230 transitions. Second operand has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:33,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:17:33,571 INFO L93 Difference]: Finished difference Result 342 states and 351 transitions. [2021-11-07 08:17:33,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-07 08:17:33,572 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 225 [2021-11-07 08:17:33,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:17:33,573 INFO L225 Difference]: With dead ends: 342 [2021-11-07 08:17:33,573 INFO L226 Difference]: Without dead ends: 235 [2021-11-07 08:17:33,573 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 244 GetRequests, 225 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-11-07 08:17:33,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2021-11-07 08:17:33,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 232. [2021-11-07 08:17:33,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 232 states, 231 states have (on average 1.0216450216450217) internal successors, (236), 231 states have internal predecessors, (236), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:33,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 232 states to 232 states and 236 transitions. [2021-11-07 08:17:33,578 INFO L78 Accepts]: Start accepts. Automaton has 232 states and 236 transitions. Word has length 225 [2021-11-07 08:17:33,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:17:33,579 INFO L470 AbstractCegarLoop]: Abstraction has 232 states and 236 transitions. [2021-11-07 08:17:33,579 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.9523809523809526) internal successors, (62), 21 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:17:33,579 INFO L276 IsEmpty]: Start isEmpty. Operand 232 states and 236 transitions. [2021-11-07 08:17:33,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2021-11-07 08:17:33,581 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:17:33,581 INFO L513 BasicCegarLoop]: trace histogram [40, 40, 18, 18, 18, 18, 18, 18, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:17:33,662 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-11-07 08:17:33,808 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-07 08:17:33,808 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:17:33,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:17:33,808 INFO L85 PathProgramCache]: Analyzing trace with hash -1051448106, now seen corresponding path program 48 times [2021-11-07 08:17:33,809 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:17:33,809 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654970404] [2021-11-07 08:17:33,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:17:33,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:17:33,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:17:34,076 INFO L134 CoverageAnalysis]: Checked inductivity of 2741 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 2417 trivial. 0 not checked. [2021-11-07 08:17:34,076 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:17:34,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654970404] [2021-11-07 08:17:34,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654970404] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:17:34,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381480627] [2021-11-07 08:17:34,077 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:17:34,077 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:17:34,077 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:17:34,082 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:17:34,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-07 08:18:12,182 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 27 check-sat command(s) [2021-11-07 08:18:12,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:18:12,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 507 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 08:18:12,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:18:12,791 INFO L134 CoverageAnalysis]: Checked inductivity of 2741 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 2572 trivial. 0 not checked. [2021-11-07 08:18:12,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381480627] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:18:12,791 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:18:12,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 16] total 35 [2021-11-07 08:18:12,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74819680] [2021-11-07 08:18:12,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-07 08:18:12,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:18:12,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-07 08:18:12,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 08:18:12,792 INFO L87 Difference]: Start difference. First operand 232 states and 236 transitions. Second operand has 35 states, 35 states have (on average 2.8285714285714287) internal successors, (99), 35 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:18:12,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:18:12,985 INFO L93 Difference]: Finished difference Result 355 states and 365 transitions. [2021-11-07 08:18:12,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-07 08:18:12,985 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.8285714285714287) internal successors, (99), 35 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 231 [2021-11-07 08:18:12,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:18:12,987 INFO L225 Difference]: With dead ends: 355 [2021-11-07 08:18:12,987 INFO L226 Difference]: Without dead ends: 244 [2021-11-07 08:18:12,988 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=329, Invalid=861, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 08:18:12,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-11-07 08:18:12,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 240. [2021-11-07 08:18:12,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.0209205020920502) internal successors, (244), 239 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:18:12,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 244 transitions. [2021-11-07 08:18:12,994 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 244 transitions. Word has length 231 [2021-11-07 08:18:12,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:18:12,994 INFO L470 AbstractCegarLoop]: Abstraction has 240 states and 244 transitions. [2021-11-07 08:18:12,995 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.8285714285714287) internal successors, (99), 35 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:18:12,995 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 244 transitions. [2021-11-07 08:18:12,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 240 [2021-11-07 08:18:12,996 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:18:12,996 INFO L513 BasicCegarLoop]: trace histogram [40, 40, 19, 19, 19, 19, 19, 19, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:18:13,032 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-11-07 08:18:13,205 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:18:13,205 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:18:13,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:18:13,206 INFO L85 PathProgramCache]: Analyzing trace with hash -1428280366, now seen corresponding path program 49 times [2021-11-07 08:18:13,206 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:18:13,206 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707774128] [2021-11-07 08:18:13,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:18:13,206 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:18:13,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:18:13,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2879 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 2518 trivial. 0 not checked. [2021-11-07 08:18:13,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:18:13,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707774128] [2021-11-07 08:18:13,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707774128] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:18:13,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745830496] [2021-11-07 08:18:13,483 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:18:13,483 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:18:13,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:18:13,489 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:18:13,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-07 08:18:15,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:18:15,339 INFO L263 TraceCheckSpWp]: Trace formula consists of 685 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 08:18:15,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:18:15,786 INFO L134 CoverageAnalysis]: Checked inductivity of 2879 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 2518 trivial. 0 not checked. [2021-11-07 08:18:15,786 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745830496] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:18:15,786 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:18:15,786 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-11-07 08:18:15,787 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377512235] [2021-11-07 08:18:15,787 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-07 08:18:15,787 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:18:15,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-07 08:18:15,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-11-07 08:18:15,788 INFO L87 Difference]: Start difference. First operand 240 states and 244 transitions. Second operand has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:18:15,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:18:15,987 INFO L93 Difference]: Finished difference Result 366 states and 375 transitions. [2021-11-07 08:18:15,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 08:18:15,988 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 239 [2021-11-07 08:18:15,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:18:15,989 INFO L225 Difference]: With dead ends: 366 [2021-11-07 08:18:15,989 INFO L226 Difference]: Without dead ends: 249 [2021-11-07 08:18:15,990 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-11-07 08:18:15,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 249 states. [2021-11-07 08:18:15,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 249 to 246. [2021-11-07 08:18:15,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 1.0204081632653061) internal successors, (250), 245 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:18:15,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 250 transitions. [2021-11-07 08:18:15,997 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 250 transitions. Word has length 239 [2021-11-07 08:18:15,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:18:15,997 INFO L470 AbstractCegarLoop]: Abstraction has 246 states and 250 transitions. [2021-11-07 08:18:15,997 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.869565217391304) internal successors, (66), 23 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:18:15,997 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 250 transitions. [2021-11-07 08:18:15,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2021-11-07 08:18:15,999 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:18:15,999 INFO L513 BasicCegarLoop]: trace histogram [40, 40, 20, 20, 20, 20, 20, 20, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:18:16,045 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-11-07 08:18:16,213 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:18:16,213 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:18:16,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:18:16,214 INFO L85 PathProgramCache]: Analyzing trace with hash 149549904, now seen corresponding path program 50 times [2021-11-07 08:18:16,214 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:18:16,214 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293628854] [2021-11-07 08:18:16,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:18:16,214 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:18:16,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:18:16,519 INFO L134 CoverageAnalysis]: Checked inductivity of 2996 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 2596 trivial. 0 not checked. [2021-11-07 08:18:16,519 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:18:16,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293628854] [2021-11-07 08:18:16,519 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1293628854] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:18:16,519 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910500069] [2021-11-07 08:18:16,519 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:18:16,519 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:18:16,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:18:16,521 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:18:16,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-07 08:18:18,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:18:18,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:18:18,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 700 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 08:18:18,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:18:18,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2996 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 2596 trivial. 0 not checked. [2021-11-07 08:18:18,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910500069] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:18:18,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:18:18,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-11-07 08:18:18,906 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219075755] [2021-11-07 08:18:18,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-07 08:18:18,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:18:18,907 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-07 08:18:18,907 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-07 08:18:18,907 INFO L87 Difference]: Start difference. First operand 246 states and 250 transitions. Second operand has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 24 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:18:19,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:18:19,075 INFO L93 Difference]: Finished difference Result 376 states and 385 transitions. [2021-11-07 08:18:19,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 08:18:19,076 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 24 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 245 [2021-11-07 08:18:19,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:18:19,077 INFO L225 Difference]: With dead ends: 376 [2021-11-07 08:18:19,077 INFO L226 Difference]: Without dead ends: 255 [2021-11-07 08:18:19,078 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 245 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-07 08:18:19,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2021-11-07 08:18:19,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 252. [2021-11-07 08:18:19,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 252 states, 251 states have (on average 1.0199203187250996) internal successors, (256), 251 states have internal predecessors, (256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:18:19,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 252 states to 252 states and 256 transitions. [2021-11-07 08:18:19,085 INFO L78 Accepts]: Start accepts. Automaton has 252 states and 256 transitions. Word has length 245 [2021-11-07 08:18:19,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:18:19,085 INFO L470 AbstractCegarLoop]: Abstraction has 252 states and 256 transitions. [2021-11-07 08:18:19,085 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.8333333333333335) internal successors, (68), 24 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:18:19,086 INFO L276 IsEmpty]: Start isEmpty. Operand 252 states and 256 transitions. [2021-11-07 08:18:19,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 252 [2021-11-07 08:18:19,087 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:18:19,087 INFO L513 BasicCegarLoop]: trace histogram [40, 40, 21, 21, 21, 21, 21, 21, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:18:19,114 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2021-11-07 08:18:19,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:18:19,297 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:18:19,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:18:19,297 INFO L85 PathProgramCache]: Analyzing trace with hash -912735154, now seen corresponding path program 51 times [2021-11-07 08:18:19,298 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:18:19,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632197307] [2021-11-07 08:18:19,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:18:19,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:18:19,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:18:19,610 INFO L134 CoverageAnalysis]: Checked inductivity of 3119 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 2678 trivial. 0 not checked. [2021-11-07 08:18:19,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:18:19,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632197307] [2021-11-07 08:18:19,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632197307] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:18:19,610 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664881940] [2021-11-07 08:18:19,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:18:19,611 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:18:19,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:18:19,614 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:18:19,629 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-07 08:18:24,047 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-11-07 08:18:24,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:18:24,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 08:18:24,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:18:24,818 INFO L134 CoverageAnalysis]: Checked inductivity of 3119 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 2923 trivial. 0 not checked. [2021-11-07 08:18:24,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664881940] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:18:24,819 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:18:24,819 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 17] total 39 [2021-11-07 08:18:24,819 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121672530] [2021-11-07 08:18:24,819 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-07 08:18:24,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:18:24,820 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-07 08:18:24,820 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=411, Invalid=1071, Unknown=0, NotChecked=0, Total=1482 [2021-11-07 08:18:24,820 INFO L87 Difference]: Start difference. First operand 252 states and 256 transitions. Second operand has 39 states, 39 states have (on average 2.7435897435897436) internal successors, (107), 39 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:18:25,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:18:25,018 INFO L93 Difference]: Finished difference Result 389 states and 399 transitions. [2021-11-07 08:18:25,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-07 08:18:25,018 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.7435897435897436) internal successors, (107), 39 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 251 [2021-11-07 08:18:25,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:18:25,020 INFO L225 Difference]: With dead ends: 389 [2021-11-07 08:18:25,020 INFO L226 Difference]: Without dead ends: 264 [2021-11-07 08:18:25,020 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 237 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=411, Invalid=1071, Unknown=0, NotChecked=0, Total=1482 [2021-11-07 08:18:25,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-11-07 08:18:25,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 260. [2021-11-07 08:18:25,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 260 states, 259 states have (on average 1.0193050193050193) internal successors, (264), 259 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:18:25,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 260 states to 260 states and 264 transitions. [2021-11-07 08:18:25,024 INFO L78 Accepts]: Start accepts. Automaton has 260 states and 264 transitions. Word has length 251 [2021-11-07 08:18:25,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:18:25,025 INFO L470 AbstractCegarLoop]: Abstraction has 260 states and 264 transitions. [2021-11-07 08:18:25,025 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.7435897435897436) internal successors, (107), 39 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:18:25,025 INFO L276 IsEmpty]: Start isEmpty. Operand 260 states and 264 transitions. [2021-11-07 08:18:25,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2021-11-07 08:18:25,027 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:18:25,027 INFO L513 BasicCegarLoop]: trace histogram [40, 40, 22, 22, 22, 22, 22, 22, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:18:25,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-11-07 08:18:25,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:18:25,233 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:18:25,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:18:25,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1735588426, now seen corresponding path program 52 times [2021-11-07 08:18:25,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:18:25,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672046151] [2021-11-07 08:18:25,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:18:25,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:18:25,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:18:25,568 INFO L134 CoverageAnalysis]: Checked inductivity of 3277 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 2793 trivial. 0 not checked. [2021-11-07 08:18:25,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:18:25,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672046151] [2021-11-07 08:18:25,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672046151] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:18:25,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394808535] [2021-11-07 08:18:25,569 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:18:25,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:18:25,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:18:25,574 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:18:25,592 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-11-07 08:18:27,618 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:18:27,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:18:27,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 734 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-07 08:18:27,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:18:28,158 INFO L134 CoverageAnalysis]: Checked inductivity of 3277 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 2793 trivial. 0 not checked. [2021-11-07 08:18:28,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394808535] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:18:28,158 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:18:28,159 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-11-07 08:18:28,159 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [859876487] [2021-11-07 08:18:28,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-07 08:18:28,160 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:18:28,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-07 08:18:28,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-11-07 08:18:28,160 INFO L87 Difference]: Start difference. First operand 260 states and 264 transitions. Second operand has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 26 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:18:28,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:18:28,346 INFO L93 Difference]: Finished difference Result 400 states and 409 transitions. [2021-11-07 08:18:28,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-07 08:18:28,346 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 26 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 259 [2021-11-07 08:18:28,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:18:28,349 INFO L225 Difference]: With dead ends: 400 [2021-11-07 08:18:28,349 INFO L226 Difference]: Without dead ends: 269 [2021-11-07 08:18:28,350 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 259 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-11-07 08:18:28,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2021-11-07 08:18:28,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 266. [2021-11-07 08:18:28,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 266 states, 265 states have (on average 1.0188679245283019) internal successors, (270), 265 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:18:28,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 266 states to 266 states and 270 transitions. [2021-11-07 08:18:28,357 INFO L78 Accepts]: Start accepts. Automaton has 266 states and 270 transitions. Word has length 259 [2021-11-07 08:18:28,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:18:28,357 INFO L470 AbstractCegarLoop]: Abstraction has 266 states and 270 transitions. [2021-11-07 08:18:28,357 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.769230769230769) internal successors, (72), 26 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-07 08:18:28,358 INFO L276 IsEmpty]: Start isEmpty. Operand 266 states and 270 transitions. [2021-11-07 08:18:28,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 266 [2021-11-07 08:18:28,359 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:18:28,359 INFO L513 BasicCegarLoop]: trace histogram [40, 40, 23, 23, 23, 23, 23, 23, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 08:18:28,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-11-07 08:18:28,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-11-07 08:18:28,581 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:18:28,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:18:28,582 INFO L85 PathProgramCache]: Analyzing trace with hash -1697716536, now seen corresponding path program 53 times [2021-11-07 08:18:28,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:18:28,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000422828] [2021-11-07 08:18:28,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:18:28,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:18:28,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:18:28,898 INFO L134 CoverageAnalysis]: Checked inductivity of 3412 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 2883 trivial. 0 not checked. [2021-11-07 08:18:28,898 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:18:28,898 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000422828] [2021-11-07 08:18:28,898 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000422828] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:18:28,899 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117779726] [2021-11-07 08:18:28,899 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:18:28,899 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:18:28,899 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:18:28,900 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:18:28,900 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e43a7bcd-8ee5-4145-b3aa-fced1e04861b/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process