./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-new/count_by_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_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/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_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-new/count_by_2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/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_f0929692-d43a-42c2-963a-a6d1322276cd/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 86d4e5d9ff4808cbd51f54a8e918c7da7f8f3d0797ade1f0adcb3da91d131026 --- Real Ultimate output --- This is Ultimate 0.2.1-dev-47ea020 [2021-11-07 07:56:11,711 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-07 07:56:11,714 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-07 07:56:11,766 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-07 07:56:11,766 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-07 07:56:11,771 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-07 07:56:11,773 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-07 07:56:11,778 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-07 07:56:11,780 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-07 07:56:11,787 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-07 07:56:11,788 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-07 07:56:11,790 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-07 07:56:11,791 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-07 07:56:11,793 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-07 07:56:11,796 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-07 07:56:11,802 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-07 07:56:11,805 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-07 07:56:11,806 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-07 07:56:11,808 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-07 07:56:11,810 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-07 07:56:11,812 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-07 07:56:11,816 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-07 07:56:11,819 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-07 07:56:11,820 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-07 07:56:11,830 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-07 07:56:11,831 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-07 07:56:11,831 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-07 07:56:11,833 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-07 07:56:11,834 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-07 07:56:11,835 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-07 07:56:11,836 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-07 07:56:11,837 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-07 07:56:11,839 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-07 07:56:11,840 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-07 07:56:11,842 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-07 07:56:11,842 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-07 07:56:11,843 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-07 07:56:11,843 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-07 07:56:11,843 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-07 07:56:11,844 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-07 07:56:11,845 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-07 07:56:11,845 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-07 07:56:11,888 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-07 07:56:11,888 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-07 07:56:11,888 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-07 07:56:11,888 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-07 07:56:11,895 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-07 07:56:11,896 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-07 07:56:11,896 INFO L138 SettingsManager]: * Use SBE=true [2021-11-07 07:56:11,896 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-07 07:56:11,896 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-07 07:56:11,896 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-07 07:56:11,897 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-07 07:56:11,898 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-07 07:56:11,898 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-07 07:56:11,898 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-07 07:56:11,898 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-07 07:56:11,898 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-07 07:56:11,898 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-07 07:56:11,899 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-07 07:56:11,899 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-07 07:56:11,899 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-07 07:56:11,899 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-07 07:56:11,899 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-07 07:56:11,900 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:56:11,900 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-07 07:56:11,900 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-07 07:56:11,901 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-07 07:56:11,901 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-07 07:56:11,901 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-07 07:56:11,901 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-07 07:56:11,902 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-07 07:56:11,903 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-07 07:56:11,903 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-07 07:56:11,903 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_f0929692-d43a-42c2-963a-a6d1322276cd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 86d4e5d9ff4808cbd51f54a8e918c7da7f8f3d0797ade1f0adcb3da91d131026 [2021-11-07 07:56:12,125 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-07 07:56:12,145 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-07 07:56:12,148 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-07 07:56:12,149 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-07 07:56:12,154 INFO L275 PluginConnector]: CDTParser initialized [2021-11-07 07:56:12,155 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/../../sv-benchmarks/c/loop-new/count_by_2.i [2021-11-07 07:56:12,209 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/data/9c80a1636/1a9de7b5301744fdac3217c53c1c97a9/FLAGcba29e948 [2021-11-07 07:56:12,698 INFO L306 CDTParser]: Found 1 translation units. [2021-11-07 07:56:12,699 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/sv-benchmarks/c/loop-new/count_by_2.i [2021-11-07 07:56:12,704 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/data/9c80a1636/1a9de7b5301744fdac3217c53c1c97a9/FLAGcba29e948 [2021-11-07 07:56:13,099 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/data/9c80a1636/1a9de7b5301744fdac3217c53c1c97a9 [2021-11-07 07:56:13,102 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-07 07:56:13,104 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-07 07:56:13,105 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-07 07:56:13,106 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-07 07:56:13,109 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-07 07:56:13,110 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:56:13" (1/1) ... [2021-11-07 07:56:13,111 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b23bc21 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:56:13, skipping insertion in model container [2021-11-07 07:56:13,111 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 07.11 07:56:13" (1/1) ... [2021-11-07 07:56:13,118 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-07 07:56:13,131 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-07 07:56:13,338 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_f0929692-d43a-42c2-963a-a6d1322276cd/sv-benchmarks/c/loop-new/count_by_2.i[891,904] [2021-11-07 07:56:13,356 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:56:13,373 INFO L203 MainTranslator]: Completed pre-run [2021-11-07 07:56:13,388 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_f0929692-d43a-42c2-963a-a6d1322276cd/sv-benchmarks/c/loop-new/count_by_2.i[891,904] [2021-11-07 07:56:13,390 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-07 07:56:13,406 INFO L208 MainTranslator]: Completed translation [2021-11-07 07:56:13,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:56:13 WrapperNode [2021-11-07 07:56:13,408 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-07 07:56:13,409 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-07 07:56:13,410 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-07 07:56:13,410 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-07 07:56:13,419 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:56:13" (1/1) ... [2021-11-07 07:56:13,434 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:56:13" (1/1) ... [2021-11-07 07:56:13,454 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-07 07:56:13,455 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-07 07:56:13,456 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-07 07:56:13,456 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-07 07:56:13,463 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:56:13" (1/1) ... [2021-11-07 07:56:13,464 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:56:13" (1/1) ... [2021-11-07 07:56:13,465 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:56:13" (1/1) ... [2021-11-07 07:56:13,465 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:56:13" (1/1) ... [2021-11-07 07:56:13,471 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:56:13" (1/1) ... [2021-11-07 07:56:13,474 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:56:13" (1/1) ... [2021-11-07 07:56:13,479 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:56:13" (1/1) ... [2021-11-07 07:56:13,481 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-07 07:56:13,482 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-07 07:56:13,483 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-07 07:56:13,483 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-07 07:56:13,484 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:56:13" (1/1) ... [2021-11-07 07:56:13,491 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-07 07:56:13,502 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:13,519 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-07 07:56:13,550 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-07 07:56:13,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-07 07:56:13,568 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-07 07:56:13,569 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-07 07:56:13,569 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-07 07:56:13,722 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-07 07:56:13,722 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-11-07 07:56:13,724 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:56:13 BoogieIcfgContainer [2021-11-07 07:56:13,724 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-07 07:56:13,726 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-07 07:56:13,726 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-07 07:56:13,729 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-07 07:56:13,729 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 07.11 07:56:13" (1/3) ... [2021-11-07 07:56:13,730 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58eb02f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:56:13, skipping insertion in model container [2021-11-07 07:56:13,730 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 07.11 07:56:13" (2/3) ... [2021-11-07 07:56:13,731 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58eb02f8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 07.11 07:56:13, skipping insertion in model container [2021-11-07 07:56:13,731 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 07.11 07:56:13" (3/3) ... [2021-11-07 07:56:13,732 INFO L111 eAbstractionObserver]: Analyzing ICFG count_by_2.i [2021-11-07 07:56:13,737 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-07 07:56:13,738 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-07 07:56:13,785 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-07 07:56:13,791 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 07:56:13,791 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-07 07:56:13,805 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 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 07:56:13,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2021-11-07 07:56:13,810 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:13,810 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2021-11-07 07:56:13,811 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:13,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:13,816 INFO L85 PathProgramCache]: Analyzing trace with hash 889605037, now seen corresponding path program 1 times [2021-11-07 07:56:13,825 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:13,826 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132310755] [2021-11-07 07:56:13,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:13,827 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:13,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:13,975 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 07:56:13,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:13,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132310755] [2021-11-07 07:56:13,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132310755] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-07 07:56:13,977 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-07 07:56:13,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-07 07:56:13,979 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662803750] [2021-11-07 07:56:13,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-07 07:56:13,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:13,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-07 07:56:13,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:56:13,999 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.4) internal successors, (14), 11 states have internal predecessors, (14), 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 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 07:56:14,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:14,022 INFO L93 Difference]: Finished difference Result 22 states and 26 transitions. [2021-11-07 07:56:14,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-07 07:56:14,024 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 6 [2021-11-07 07:56:14,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:14,031 INFO L225 Difference]: With dead ends: 22 [2021-11-07 07:56:14,032 INFO L226 Difference]: Without dead ends: 10 [2021-11-07 07:56:14,034 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-07 07:56:14,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-11-07 07:56:14,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 9. [2021-11-07 07:56:14,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 9 states, 8 states have (on average 1.125) internal successors, (9), 8 states have internal predecessors, (9), 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 07:56:14,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-11-07 07:56:14,065 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 6 [2021-11-07 07:56:14,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:14,065 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-11-07 07:56:14,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 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 07:56:14,066 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-11-07 07:56:14,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-11-07 07:56:14,066 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:14,066 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:14,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-07 07:56:14,067 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:14,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:14,068 INFO L85 PathProgramCache]: Analyzing trace with hash 265180975, now seen corresponding path program 1 times [2021-11-07 07:56:14,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:14,069 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1515685007] [2021-11-07 07:56:14,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:14,069 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:14,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:14,114 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 07:56:14,114 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:14,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1515685007] [2021-11-07 07:56:14,115 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1515685007] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:14,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722173317] [2021-11-07 07:56:14,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:14,116 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:14,116 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:14,134 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:14,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-07 07:56:14,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:14,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 3 conjunts are in the unsatisfiable core [2021-11-07 07:56:14,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:14,359 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 07:56:14,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722173317] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:14,360 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:14,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 5 [2021-11-07 07:56:14,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317797847] [2021-11-07 07:56:14,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-07 07:56:14,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:14,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-07 07:56:14,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-11-07 07:56:14,375 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 07:56:14,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:14,403 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2021-11-07 07:56:14,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-07 07:56:14,404 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 8 [2021-11-07 07:56:14,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:14,404 INFO L225 Difference]: With dead ends: 16 [2021-11-07 07:56:14,404 INFO L226 Difference]: Without dead ends: 12 [2021-11-07 07:56:14,405 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 8 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 07:56:14,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-07 07:56:14,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 11. [2021-11-07 07:56:14,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 11 states, 10 states have (on average 1.1) internal successors, (11), 10 states have internal predecessors, (11), 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 07:56:14,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2021-11-07 07:56:14,410 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 8 [2021-11-07 07:56:14,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:14,410 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2021-11-07 07:56:14,411 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.2) internal successors, (11), 5 states have internal predecessors, (11), 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 07:56:14,411 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2021-11-07 07:56:14,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-11-07 07:56:14,412 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:14,413 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:14,446 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-07 07:56:14,638 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:14,638 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:14,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:14,639 INFO L85 PathProgramCache]: Analyzing trace with hash 1489078833, now seen corresponding path program 2 times [2021-11-07 07:56:14,639 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:14,639 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081788694] [2021-11-07 07:56:14,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:14,640 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:14,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:14,703 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:14,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:14,703 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081788694] [2021-11-07 07:56:14,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081788694] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:14,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682547284] [2021-11-07 07:56:14,704 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:56:14,704 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:14,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:14,706 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:14,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-07 07:56:14,786 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:56:14,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:56:14,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-07 07:56:14,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:14,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:14,847 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1682547284] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:14,847 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:14,847 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-11-07 07:56:14,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716661854] [2021-11-07 07:56:14,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-07 07:56:14,848 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:14,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-07 07:56:14,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:56:14,850 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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 07:56:14,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:14,867 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2021-11-07 07:56:14,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-07 07:56:14,868 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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 10 [2021-11-07 07:56:14,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:14,869 INFO L225 Difference]: With dead ends: 18 [2021-11-07 07:56:14,869 INFO L226 Difference]: Without dead ends: 14 [2021-11-07 07:56:14,869 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-11-07 07:56:14,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-11-07 07:56:14,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 13. [2021-11-07 07:56:14,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 13 states, 12 states have (on average 1.0833333333333333) internal successors, (13), 12 states have internal predecessors, (13), 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 07:56:14,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-11-07 07:56:14,873 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 10 [2021-11-07 07:56:14,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:14,873 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-11-07 07:56:14,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 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 07:56:14,873 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-11-07 07:56:14,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-07 07:56:14,874 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:14,874 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:14,908 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-07 07:56:15,101 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:15,102 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:15,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:15,103 INFO L85 PathProgramCache]: Analyzing trace with hash 833881267, now seen corresponding path program 3 times [2021-11-07 07:56:15,103 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:15,103 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1161382529] [2021-11-07 07:56:15,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:15,103 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:15,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:15,193 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:15,193 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:15,193 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1161382529] [2021-11-07 07:56:15,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1161382529] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:15,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1402734969] [2021-11-07 07:56:15,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:56:15,194 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:15,194 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:15,198 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:15,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-07 07:56:15,249 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-07 07:56:15,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:56:15,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 5 conjunts are in the unsatisfiable core [2021-11-07 07:56:15,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:15,304 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:15,304 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1402734969] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:15,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:15,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2021-11-07 07:56:15,305 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123924796] [2021-11-07 07:56:15,305 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-07 07:56:15,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:15,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-07 07:56:15,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-11-07 07:56:15,307 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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 07:56:15,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:15,337 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2021-11-07 07:56:15,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-07 07:56:15,338 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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 12 [2021-11-07 07:56:15,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:15,339 INFO L225 Difference]: With dead ends: 20 [2021-11-07 07:56:15,340 INFO L226 Difference]: Without dead ends: 16 [2021-11-07 07:56:15,340 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 12 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 07:56:15,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-11-07 07:56:15,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2021-11-07 07:56:15,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 14 states have (on average 1.0714285714285714) internal successors, (15), 14 states have internal predecessors, (15), 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 07:56:15,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-11-07 07:56:15,347 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 12 [2021-11-07 07:56:15,347 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:15,347 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-11-07 07:56:15,348 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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 07:56:15,348 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-11-07 07:56:15,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-07 07:56:15,349 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:15,349 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:15,385 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2021-11-07 07:56:15,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:15,572 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:15,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:15,573 INFO L85 PathProgramCache]: Analyzing trace with hash -1745754443, now seen corresponding path program 4 times [2021-11-07 07:56:15,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:15,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820015092] [2021-11-07 07:56:15,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:15,573 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:15,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:15,637 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:15,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:15,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820015092] [2021-11-07 07:56:15,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820015092] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:15,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906246900] [2021-11-07 07:56:15,638 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:56:15,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:15,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:15,648 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:15,652 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-07 07:56:15,696 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:56:15,696 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:56:15,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 47 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-07 07:56:15,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:15,776 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:15,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906246900] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:15,777 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:15,778 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2021-11-07 07:56:15,778 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910263318] [2021-11-07 07:56:15,778 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-11-07 07:56:15,781 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:15,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-11-07 07:56:15,784 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-07 07:56:15,784 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 07:56:15,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:15,813 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2021-11-07 07:56:15,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-07 07:56:15,814 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 14 [2021-11-07 07:56:15,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:15,816 INFO L225 Difference]: With dead ends: 22 [2021-11-07 07:56:15,817 INFO L226 Difference]: Without dead ends: 18 [2021-11-07 07:56:15,817 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-11-07 07:56:15,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-07 07:56:15,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 17. [2021-11-07 07:56:15,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.0625) internal successors, (17), 16 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 07:56:15,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-11-07 07:56:15,824 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 14 [2021-11-07 07:56:15,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:15,824 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-11-07 07:56:15,825 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.125) internal successors, (17), 8 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 07:56:15,825 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-11-07 07:56:15,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-07 07:56:15,828 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:15,828 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:15,866 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-07 07:56:16,037 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:16,038 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:16,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:16,038 INFO L85 PathProgramCache]: Analyzing trace with hash 1715425335, now seen corresponding path program 5 times [2021-11-07 07:56:16,038 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:16,039 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188394547] [2021-11-07 07:56:16,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:16,039 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:16,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:16,104 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:16,104 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:16,104 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188394547] [2021-11-07 07:56:16,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [188394547] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:16,105 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1247158272] [2021-11-07 07:56:16,105 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:56:16,105 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:16,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:16,106 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:16,125 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-07 07:56:16,160 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2021-11-07 07:56:16,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:56:16,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 7 conjunts are in the unsatisfiable core [2021-11-07 07:56:16,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:16,242 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:16,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1247158272] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:16,242 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:16,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-11-07 07:56:16,243 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1399127086] [2021-11-07 07:56:16,243 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-07 07:56:16,243 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:16,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-07 07:56:16,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-07 07:56:16,244 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 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 07:56:16,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:16,265 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2021-11-07 07:56:16,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-11-07 07:56:16,266 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 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 16 [2021-11-07 07:56:16,266 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:16,267 INFO L225 Difference]: With dead ends: 24 [2021-11-07 07:56:16,267 INFO L226 Difference]: Without dead ends: 20 [2021-11-07 07:56:16,267 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-11-07 07:56:16,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-11-07 07:56:16,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 19. [2021-11-07 07:56:16,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 18 states have (on average 1.0555555555555556) internal successors, (19), 18 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 07:56:16,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-11-07 07:56:16,271 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 16 [2021-11-07 07:56:16,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:16,271 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-11-07 07:56:16,271 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 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 07:56:16,271 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-11-07 07:56:16,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-07 07:56:16,272 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:16,272 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:16,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-07 07:56:16,491 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-11-07 07:56:16,492 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:16,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:16,492 INFO L85 PathProgramCache]: Analyzing trace with hash -690462407, now seen corresponding path program 6 times [2021-11-07 07:56:16,492 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:16,493 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99175767] [2021-11-07 07:56:16,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:16,493 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:16,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:16,601 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:16,602 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:16,602 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99175767] [2021-11-07 07:56:16,602 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [99175767] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:16,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454990529] [2021-11-07 07:56:16,606 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:56:16,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:16,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:16,607 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:16,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-07 07:56:16,661 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-07 07:56:16,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:56:16,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-07 07:56:16,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:16,737 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:16,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [454990529] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:16,738 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:16,738 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-11-07 07:56:16,738 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [806648925] [2021-11-07 07:56:16,739 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-07 07:56:16,739 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:16,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-07 07:56:16,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-11-07 07:56:16,740 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 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 07:56:16,778 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:16,778 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-11-07 07:56:16,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-07 07:56:16,779 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 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 18 [2021-11-07 07:56:16,779 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:16,780 INFO L225 Difference]: With dead ends: 26 [2021-11-07 07:56:16,780 INFO L226 Difference]: Without dead ends: 22 [2021-11-07 07:56:16,782 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 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 07:56:16,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-07 07:56:16,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2021-11-07 07:56:16,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 20 states have (on average 1.05) internal successors, (21), 20 states have internal predecessors, (21), 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 07:56:16,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2021-11-07 07:56:16,793 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 18 [2021-11-07 07:56:16,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:16,793 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2021-11-07 07:56:16,795 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.1) internal successors, (21), 10 states have internal predecessors, (21), 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 07:56:16,799 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2021-11-07 07:56:16,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-07 07:56:16,801 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:16,801 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:16,830 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-11-07 07:56:17,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:17,018 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:17,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:17,018 INFO L85 PathProgramCache]: Analyzing trace with hash -2056177221, now seen corresponding path program 7 times [2021-11-07 07:56:17,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:17,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790373338] [2021-11-07 07:56:17,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:17,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:17,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:17,099 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:17,099 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:17,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790373338] [2021-11-07 07:56:17,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790373338] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:17,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907291731] [2021-11-07 07:56:17,100 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:56:17,100 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:17,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:17,104 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:17,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-07 07:56:17,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:17,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 9 conjunts are in the unsatisfiable core [2021-11-07 07:56:17,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:17,232 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:17,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907291731] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:17,232 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:17,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2021-11-07 07:56:17,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41260294] [2021-11-07 07:56:17,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-11-07 07:56:17,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:17,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-11-07 07:56:17,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-11-07 07:56:17,235 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 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 07:56:17,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:17,260 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2021-11-07 07:56:17,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-07 07:56:17,261 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 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 20 [2021-11-07 07:56:17,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:17,262 INFO L225 Difference]: With dead ends: 28 [2021-11-07 07:56:17,262 INFO L226 Difference]: Without dead ends: 24 [2021-11-07 07:56:17,262 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 20 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 07:56:17,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-11-07 07:56:17,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2021-11-07 07:56:17,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.0454545454545454) internal successors, (23), 22 states have internal predecessors, (23), 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 07:56:17,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-11-07 07:56:17,266 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 20 [2021-11-07 07:56:17,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:17,266 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-11-07 07:56:17,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.090909090909091) internal successors, (23), 11 states have internal predecessors, (23), 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 07:56:17,267 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-11-07 07:56:17,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-07 07:56:17,267 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:17,267 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:17,301 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2021-11-07 07:56:17,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:17,490 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:17,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:17,490 INFO L85 PathProgramCache]: Analyzing trace with hash -248120899, now seen corresponding path program 8 times [2021-11-07 07:56:17,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:17,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1965744887] [2021-11-07 07:56:17,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:17,491 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:17,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:17,616 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:17,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:17,619 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1965744887] [2021-11-07 07:56:17,622 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1965744887] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:17,622 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307886764] [2021-11-07 07:56:17,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:56:17,622 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:17,623 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:17,623 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:17,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-07 07:56:17,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:56:17,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:56:17,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-07 07:56:17,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:17,756 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:17,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [307886764] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:17,756 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:17,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-11-07 07:56:17,757 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411887731] [2021-11-07 07:56:17,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-07 07:56:17,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:17,758 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-07 07:56:17,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-07 07:56:17,758 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 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 07:56:17,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:17,796 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2021-11-07 07:56:17,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-07 07:56:17,796 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 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 22 [2021-11-07 07:56:17,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:17,797 INFO L225 Difference]: With dead ends: 30 [2021-11-07 07:56:17,797 INFO L226 Difference]: Without dead ends: 26 [2021-11-07 07:56:17,798 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-11-07 07:56:17,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-11-07 07:56:17,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 25. [2021-11-07 07:56:17,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 24 states have (on average 1.0416666666666667) internal successors, (25), 24 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 07:56:17,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2021-11-07 07:56:17,802 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 22 [2021-11-07 07:56:17,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:17,803 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2021-11-07 07:56:17,803 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 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 07:56:17,803 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2021-11-07 07:56:17,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-07 07:56:17,804 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:17,804 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:17,841 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-07 07:56:18,017 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:18,018 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:18,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:18,018 INFO L85 PathProgramCache]: Analyzing trace with hash 2127216959, now seen corresponding path program 9 times [2021-11-07 07:56:18,018 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:18,018 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431900006] [2021-11-07 07:56:18,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:18,019 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:18,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:18,118 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:18,118 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:18,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431900006] [2021-11-07 07:56:18,118 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431900006] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:18,118 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615395672] [2021-11-07 07:56:18,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:56:18,119 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:18,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:18,121 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:18,122 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-07 07:56:18,199 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2021-11-07 07:56:18,199 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:56:18,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 62 conjuncts, 11 conjunts are in the unsatisfiable core [2021-11-07 07:56:18,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:18,295 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:18,295 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615395672] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:18,295 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:18,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-11-07 07:56:18,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624241018] [2021-11-07 07:56:18,296 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-07 07:56:18,296 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:18,296 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-07 07:56:18,297 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-11-07 07:56:18,297 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 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 07:56:18,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:18,333 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2021-11-07 07:56:18,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-07 07:56:18,334 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 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 24 [2021-11-07 07:56:18,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:18,334 INFO L225 Difference]: With dead ends: 32 [2021-11-07 07:56:18,334 INFO L226 Difference]: Without dead ends: 28 [2021-11-07 07:56:18,335 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 24 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 07:56:18,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-11-07 07:56:18,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 27. [2021-11-07 07:56:18,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.0384615384615385) internal successors, (27), 26 states have internal predecessors, (27), 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 07:56:18,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-11-07 07:56:18,338 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 24 [2021-11-07 07:56:18,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:18,343 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-11-07 07:56:18,343 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.076923076923077) internal successors, (27), 13 states have internal predecessors, (27), 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 07:56:18,343 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-11-07 07:56:18,344 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-07 07:56:18,344 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:18,344 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:18,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-07 07:56:18,557 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-07 07:56:18,558 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:18,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:18,558 INFO L85 PathProgramCache]: Analyzing trace with hash -95702975, now seen corresponding path program 10 times [2021-11-07 07:56:18,558 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:18,558 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474048873] [2021-11-07 07:56:18,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:18,559 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:18,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:18,660 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:18,660 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:18,660 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474048873] [2021-11-07 07:56:18,661 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474048873] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:18,661 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934142619] [2021-11-07 07:56:18,661 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:56:18,661 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:18,661 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:18,667 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:18,689 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-07 07:56:18,760 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:56:18,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:56:18,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-07 07:56:18,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:18,851 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:18,851 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934142619] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:18,851 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:18,852 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-11-07 07:56:18,852 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393294898] [2021-11-07 07:56:18,852 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-07 07:56:18,852 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:18,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-07 07:56:18,853 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-11-07 07:56:18,854 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 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 07:56:18,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:18,900 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2021-11-07 07:56:18,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-07 07:56:18,901 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 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 26 [2021-11-07 07:56:18,901 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:18,902 INFO L225 Difference]: With dead ends: 34 [2021-11-07 07:56:18,902 INFO L226 Difference]: Without dead ends: 30 [2021-11-07 07:56:18,905 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 26 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 07:56:18,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-11-07 07:56:18,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 29. [2021-11-07 07:56:18,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.0357142857142858) internal successors, (29), 28 states have internal predecessors, (29), 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 07:56:18,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2021-11-07 07:56:18,916 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 26 [2021-11-07 07:56:18,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:18,916 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2021-11-07 07:56:18,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 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 07:56:18,917 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2021-11-07 07:56:18,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-07 07:56:18,919 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:18,919 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:18,957 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-07 07:56:19,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-11-07 07:56:19,134 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:19,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:19,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1723013437, now seen corresponding path program 11 times [2021-11-07 07:56:19,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:19,135 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114179162] [2021-11-07 07:56:19,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:19,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:19,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:19,301 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:19,301 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:19,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114179162] [2021-11-07 07:56:19,301 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2114179162] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:19,301 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920766100] [2021-11-07 07:56:19,302 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:56:19,302 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:19,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:19,303 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:19,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-07 07:56:19,418 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2021-11-07 07:56:19,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:56:19,420 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-07 07:56:19,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:19,524 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:19,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920766100] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:19,525 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:19,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2021-11-07 07:56:19,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54541115] [2021-11-07 07:56:19,526 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-07 07:56:19,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:19,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-07 07:56:19,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-11-07 07:56:19,527 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 07:56:19,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:19,575 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2021-11-07 07:56:19,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-07 07:56:19,575 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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) Word has length 28 [2021-11-07 07:56:19,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:19,576 INFO L225 Difference]: With dead ends: 36 [2021-11-07 07:56:19,576 INFO L226 Difference]: Without dead ends: 32 [2021-11-07 07:56:19,577 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 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 07:56:19,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-11-07 07:56:19,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 31. [2021-11-07 07:56:19,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 30 states have (on average 1.0333333333333334) internal successors, (31), 30 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 07:56:19,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2021-11-07 07:56:19,580 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 28 [2021-11-07 07:56:19,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:19,581 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2021-11-07 07:56:19,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 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 07:56:19,581 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2021-11-07 07:56:19,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-07 07:56:19,582 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:19,582 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:19,624 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2021-11-07 07:56:19,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-11-07 07:56:19,810 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:19,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:19,810 INFO L85 PathProgramCache]: Analyzing trace with hash 2094695621, now seen corresponding path program 12 times [2021-11-07 07:56:19,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:19,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751797061] [2021-11-07 07:56:19,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:19,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:19,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:19,941 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:19,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:19,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751797061] [2021-11-07 07:56:19,941 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1751797061] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:19,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374154990] [2021-11-07 07:56:19,941 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:56:19,942 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:19,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:19,943 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:19,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-07 07:56:20,057 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-11-07 07:56:20,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:56:20,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-07 07:56:20,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:20,174 INFO L134 CoverageAnalysis]: Checked inductivity of 144 backedges. 0 proven. 144 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:20,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374154990] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:20,175 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:20,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-11-07 07:56:20,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639196976] [2021-11-07 07:56:20,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-07 07:56:20,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:20,178 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-07 07:56:20,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-11-07 07:56:20,180 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 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 07:56:20,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:20,217 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2021-11-07 07:56:20,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-07 07:56:20,218 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 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 30 [2021-11-07 07:56:20,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:20,223 INFO L225 Difference]: With dead ends: 38 [2021-11-07 07:56:20,223 INFO L226 Difference]: Without dead ends: 34 [2021-11-07 07:56:20,223 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-11-07 07:56:20,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-11-07 07:56:20,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 33. [2021-11-07 07:56:20,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 33 states, 32 states have (on average 1.03125) internal successors, (33), 32 states have internal predecessors, (33), 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 07:56:20,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2021-11-07 07:56:20,236 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 30 [2021-11-07 07:56:20,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:20,236 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2021-11-07 07:56:20,237 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 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 07:56:20,237 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2021-11-07 07:56:20,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-07 07:56:20,244 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:20,245 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:20,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-11-07 07:56:20,461 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:20,462 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:20,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:20,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1283937721, now seen corresponding path program 13 times [2021-11-07 07:56:20,462 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:20,462 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889595044] [2021-11-07 07:56:20,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:20,463 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:20,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:20,636 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:20,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:20,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889595044] [2021-11-07 07:56:20,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889595044] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:20,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619933194] [2021-11-07 07:56:20,637 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:56:20,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:20,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:20,639 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:20,657 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-07 07:56:20,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:20,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-07 07:56:20,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:20,879 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 0 proven. 169 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:20,879 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [619933194] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:20,879 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:20,880 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-11-07 07:56:20,880 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080199237] [2021-11-07 07:56:20,880 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-07 07:56:20,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:20,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-07 07:56:20,881 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-11-07 07:56:20,882 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 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 07:56:20,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:20,942 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2021-11-07 07:56:20,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-07 07:56:20,943 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 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 32 [2021-11-07 07:56:20,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:20,943 INFO L225 Difference]: With dead ends: 40 [2021-11-07 07:56:20,944 INFO L226 Difference]: Without dead ends: 36 [2021-11-07 07:56:20,945 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 32 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 07:56:20,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-11-07 07:56:20,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 35. [2021-11-07 07:56:20,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 34 states have (on average 1.0294117647058822) internal successors, (35), 34 states have internal predecessors, (35), 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 07:56:20,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2021-11-07 07:56:20,950 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 32 [2021-11-07 07:56:20,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:20,951 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2021-11-07 07:56:20,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 17 states have internal predecessors, (35), 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 07:56:20,951 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2021-11-07 07:56:20,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-11-07 07:56:20,951 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:20,951 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:20,972 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-07 07:56:21,152 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:21,152 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:21,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:21,152 INFO L85 PathProgramCache]: Analyzing trace with hash -1155303607, now seen corresponding path program 14 times [2021-11-07 07:56:21,152 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:21,153 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1016163788] [2021-11-07 07:56:21,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:21,153 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:21,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:21,309 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:21,309 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:21,309 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1016163788] [2021-11-07 07:56:21,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1016163788] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:21,310 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616551988] [2021-11-07 07:56:21,310 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:56:21,310 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:21,310 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:21,318 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:21,337 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-07 07:56:21,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:56:21,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:56:21,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 77 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-07 07:56:21,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:21,582 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:21,582 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616551988] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:21,583 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:21,583 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-11-07 07:56:21,583 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1563307248] [2021-11-07 07:56:21,583 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-07 07:56:21,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:21,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-07 07:56:21,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-11-07 07:56:21,585 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 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 07:56:21,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:21,646 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2021-11-07 07:56:21,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-11-07 07:56:21,646 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 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) Word has length 34 [2021-11-07 07:56:21,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:21,649 INFO L225 Difference]: With dead ends: 42 [2021-11-07 07:56:21,649 INFO L226 Difference]: Without dead ends: 38 [2021-11-07 07:56:21,652 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-11-07 07:56:21,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-11-07 07:56:21,657 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2021-11-07 07:56:21,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 1.0277777777777777) internal successors, (37), 36 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 07:56:21,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2021-11-07 07:56:21,661 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 34 [2021-11-07 07:56:21,661 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:21,662 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2021-11-07 07:56:21,662 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 18 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 07:56:21,662 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2021-11-07 07:56:21,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-07 07:56:21,663 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:21,663 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:21,698 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-07 07:56:21,880 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-07 07:56:21,880 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:21,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:21,880 INFO L85 PathProgramCache]: Analyzing trace with hash -2091971637, now seen corresponding path program 15 times [2021-11-07 07:56:21,880 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:21,880 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224865531] [2021-11-07 07:56:21,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:21,881 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:21,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:22,064 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:22,064 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:22,064 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224865531] [2021-11-07 07:56:22,065 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224865531] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:22,065 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [242685187] [2021-11-07 07:56:22,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:56:22,065 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:22,065 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:22,074 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:22,090 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-07 07:56:22,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 16 check-sat command(s) [2021-11-07 07:56:22,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:56:22,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 17 conjunts are in the unsatisfiable core [2021-11-07 07:56:22,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:22,311 INFO L134 CoverageAnalysis]: Checked inductivity of 225 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:22,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [242685187] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:22,312 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:22,312 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-11-07 07:56:22,312 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290479017] [2021-11-07 07:56:22,313 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-07 07:56:22,313 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:22,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-07 07:56:22,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-11-07 07:56:22,316 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 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 07:56:22,361 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:22,361 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2021-11-07 07:56:22,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-07 07:56:22,362 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 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 36 [2021-11-07 07:56:22,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:22,363 INFO L225 Difference]: With dead ends: 44 [2021-11-07 07:56:22,363 INFO L226 Difference]: Without dead ends: 40 [2021-11-07 07:56:22,363 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 36 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 07:56:22,365 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-11-07 07:56:22,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 39. [2021-11-07 07:56:22,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 39 states, 38 states have (on average 1.0263157894736843) internal successors, (39), 38 states have internal predecessors, (39), 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 07:56:22,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2021-11-07 07:56:22,382 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 36 [2021-11-07 07:56:22,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:22,384 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2021-11-07 07:56:22,384 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 19 states have internal predecessors, (39), 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 07:56:22,385 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2021-11-07 07:56:22,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-07 07:56:22,386 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:22,387 INFO L513 BasicCegarLoop]: trace histogram [16, 16, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:22,411 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-07 07:56:22,597 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-07 07:56:22,598 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:22,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:22,598 INFO L85 PathProgramCache]: Analyzing trace with hash -286816307, now seen corresponding path program 16 times [2021-11-07 07:56:22,598 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:22,598 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790156082] [2021-11-07 07:56:22,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:22,599 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:22,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:22,780 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:22,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:22,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790156082] [2021-11-07 07:56:22,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790156082] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:22,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805510068] [2021-11-07 07:56:22,781 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:56:22,781 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:22,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:22,782 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:22,784 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-07 07:56:22,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:56:22,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:56:22,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-07 07:56:22,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:23,076 INFO L134 CoverageAnalysis]: Checked inductivity of 256 backedges. 0 proven. 256 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:23,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805510068] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:23,077 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:23,077 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-11-07 07:56:23,077 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882319833] [2021-11-07 07:56:23,078 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-07 07:56:23,078 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:23,078 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-07 07:56:23,079 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-11-07 07:56:23,079 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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 07:56:23,130 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:23,130 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2021-11-07 07:56:23,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-11-07 07:56:23,131 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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 38 [2021-11-07 07:56:23,131 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:23,131 INFO L225 Difference]: With dead ends: 46 [2021-11-07 07:56:23,131 INFO L226 Difference]: Without dead ends: 42 [2021-11-07 07:56:23,132 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 38 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 07:56:23,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-07 07:56:23,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 41. [2021-11-07 07:56:23,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 1.025) internal successors, (41), 40 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 07:56:23,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2021-11-07 07:56:23,136 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 38 [2021-11-07 07:56:23,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:23,137 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2021-11-07 07:56:23,137 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 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 07:56:23,137 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2021-11-07 07:56:23,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-07 07:56:23,140 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:23,140 INFO L513 BasicCegarLoop]: trace histogram [17, 17, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:23,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-07 07:56:23,353 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-07 07:56:23,354 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:23,354 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:23,354 INFO L85 PathProgramCache]: Analyzing trace with hash -699331761, now seen corresponding path program 17 times [2021-11-07 07:56:23,354 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:23,354 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723846500] [2021-11-07 07:56:23,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:23,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:23,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:23,568 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:23,568 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:23,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723846500] [2021-11-07 07:56:23,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1723846500] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:23,568 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404882120] [2021-11-07 07:56:23,569 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:56:23,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:23,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:23,577 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:23,578 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-07 07:56:23,717 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 18 check-sat command(s) [2021-11-07 07:56:23,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:56:23,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-07 07:56:23,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:23,863 INFO L134 CoverageAnalysis]: Checked inductivity of 289 backedges. 0 proven. 289 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:23,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1404882120] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:23,863 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:23,863 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-11-07 07:56:23,864 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205675392] [2021-11-07 07:56:23,864 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-07 07:56:23,864 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:23,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-07 07:56:23,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-11-07 07:56:23,865 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 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 07:56:23,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:23,913 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2021-11-07 07:56:23,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-07 07:56:23,914 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 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 40 [2021-11-07 07:56:23,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:23,915 INFO L225 Difference]: With dead ends: 48 [2021-11-07 07:56:23,915 INFO L226 Difference]: Without dead ends: 44 [2021-11-07 07:56:23,915 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 40 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 07:56:23,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-11-07 07:56:23,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2021-11-07 07:56:23,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 1.0238095238095237) internal successors, (43), 42 states have internal predecessors, (43), 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 07:56:23,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2021-11-07 07:56:23,919 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 40 [2021-11-07 07:56:23,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:23,919 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2021-11-07 07:56:23,919 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0476190476190474) internal successors, (43), 21 states have internal predecessors, (43), 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 07:56:23,920 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2021-11-07 07:56:23,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-07 07:56:23,920 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:23,920 INFO L513 BasicCegarLoop]: trace histogram [18, 18, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:23,946 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-07 07:56:24,133 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-07 07:56:24,134 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:24,134 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:24,134 INFO L85 PathProgramCache]: Analyzing trace with hash -1989691823, now seen corresponding path program 18 times [2021-11-07 07:56:24,134 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:24,134 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057336095] [2021-11-07 07:56:24,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:24,135 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:24,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:24,346 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:24,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:24,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057336095] [2021-11-07 07:56:24,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057336095] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:24,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1314822281] [2021-11-07 07:56:24,347 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:56:24,348 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:24,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:24,351 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:24,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-07 07:56:24,506 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-11-07 07:56:24,506 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:56:24,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-07 07:56:24,508 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:24,652 INFO L134 CoverageAnalysis]: Checked inductivity of 324 backedges. 0 proven. 324 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:24,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1314822281] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:24,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:24,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-11-07 07:56:24,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719342322] [2021-11-07 07:56:24,652 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-07 07:56:24,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:24,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-07 07:56:24,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-11-07 07:56:24,654 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 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 07:56:24,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:24,706 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2021-11-07 07:56:24,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-07 07:56:24,707 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 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 42 [2021-11-07 07:56:24,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:24,707 INFO L225 Difference]: With dead ends: 50 [2021-11-07 07:56:24,707 INFO L226 Difference]: Without dead ends: 46 [2021-11-07 07:56:24,708 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 42 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 07:56:24,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-11-07 07:56:24,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2021-11-07 07:56:24,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.0227272727272727) internal successors, (45), 44 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 07:56:24,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2021-11-07 07:56:24,711 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 42 [2021-11-07 07:56:24,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:24,712 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2021-11-07 07:56:24,712 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.0454545454545454) internal successors, (45), 22 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 07:56:24,712 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2021-11-07 07:56:24,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-07 07:56:24,713 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:24,713 INFO L513 BasicCegarLoop]: trace histogram [19, 19, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:24,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-07 07:56:24,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:24,926 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:24,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:24,926 INFO L85 PathProgramCache]: Analyzing trace with hash -780162861, now seen corresponding path program 19 times [2021-11-07 07:56:24,926 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:24,926 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538741315] [2021-11-07 07:56:24,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:24,926 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:24,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:25,150 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:25,150 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:25,150 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538741315] [2021-11-07 07:56:25,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538741315] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:25,151 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [763240234] [2021-11-07 07:56:25,151 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:56:25,151 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:25,151 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:25,152 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:25,166 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-07 07:56:25,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:25,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-07 07:56:25,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:25,497 INFO L134 CoverageAnalysis]: Checked inductivity of 361 backedges. 0 proven. 361 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:25,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [763240234] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:25,497 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:25,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-11-07 07:56:25,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778093353] [2021-11-07 07:56:25,498 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-07 07:56:25,498 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:25,499 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-07 07:56:25,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-11-07 07:56:25,500 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 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 07:56:25,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:25,556 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2021-11-07 07:56:25,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-07 07:56:25,556 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 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 44 [2021-11-07 07:56:25,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:25,557 INFO L225 Difference]: With dead ends: 52 [2021-11-07 07:56:25,557 INFO L226 Difference]: Without dead ends: 48 [2021-11-07 07:56:25,558 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 44 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 07:56:25,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-07 07:56:25,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 47. [2021-11-07 07:56:25,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.0217391304347827) internal successors, (47), 46 states have internal predecessors, (47), 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 07:56:25,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2021-11-07 07:56:25,561 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 44 [2021-11-07 07:56:25,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:25,561 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2021-11-07 07:56:25,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0434782608695654) internal successors, (47), 23 states have internal predecessors, (47), 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 07:56:25,562 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2021-11-07 07:56:25,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-07 07:56:25,562 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:25,562 INFO L513 BasicCegarLoop]: trace histogram [20, 20, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:25,600 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-07 07:56:25,777 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:25,778 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:25,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:25,778 INFO L85 PathProgramCache]: Analyzing trace with hash 1935999701, now seen corresponding path program 20 times [2021-11-07 07:56:25,778 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:25,778 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961448160] [2021-11-07 07:56:25,778 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:25,778 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:25,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:25,999 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:25,999 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:26,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961448160] [2021-11-07 07:56:26,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961448160] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:26,000 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437386962] [2021-11-07 07:56:26,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:56:26,000 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:26,000 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:26,001 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:26,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-07 07:56:26,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:56:26,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:56:26,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-07 07:56:26,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:26,336 INFO L134 CoverageAnalysis]: Checked inductivity of 400 backedges. 0 proven. 400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:26,337 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [437386962] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:26,337 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:26,337 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-11-07 07:56:26,337 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967592950] [2021-11-07 07:56:26,338 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-07 07:56:26,338 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:26,338 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-07 07:56:26,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-11-07 07:56:26,339 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 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 07:56:26,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:26,401 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2021-11-07 07:56:26,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-07 07:56:26,402 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 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 46 [2021-11-07 07:56:26,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:26,403 INFO L225 Difference]: With dead ends: 54 [2021-11-07 07:56:26,403 INFO L226 Difference]: Without dead ends: 50 [2021-11-07 07:56:26,404 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 46 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 07:56:26,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-11-07 07:56:26,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 49. [2021-11-07 07:56:26,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 1.0208333333333333) internal successors, (49), 48 states have internal predecessors, (49), 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 07:56:26,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2021-11-07 07:56:26,407 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 46 [2021-11-07 07:56:26,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:26,407 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2021-11-07 07:56:26,407 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.0416666666666665) internal successors, (49), 24 states have internal predecessors, (49), 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 07:56:26,407 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2021-11-07 07:56:26,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-07 07:56:26,408 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:26,408 INFO L513 BasicCegarLoop]: trace histogram [21, 21, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:26,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-07 07:56:26,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-11-07 07:56:26,622 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:26,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:26,622 INFO L85 PathProgramCache]: Analyzing trace with hash 828105815, now seen corresponding path program 21 times [2021-11-07 07:56:26,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:26,622 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474204051] [2021-11-07 07:56:26,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:26,622 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:26,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:26,913 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:26,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:26,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474204051] [2021-11-07 07:56:26,913 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474204051] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:26,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451564024] [2021-11-07 07:56:26,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:56:26,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:26,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:26,915 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:26,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-07 07:56:27,170 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2021-11-07 07:56:27,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:56:27,171 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-07 07:56:27,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:27,347 INFO L134 CoverageAnalysis]: Checked inductivity of 441 backedges. 0 proven. 441 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:27,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451564024] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:27,347 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:27,347 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-11-07 07:56:27,348 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223735585] [2021-11-07 07:56:27,348 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-07 07:56:27,348 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:27,349 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-07 07:56:27,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-07 07:56:27,349 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 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 07:56:27,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:27,412 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2021-11-07 07:56:27,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-07 07:56:27,413 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 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 48 [2021-11-07 07:56:27,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:27,413 INFO L225 Difference]: With dead ends: 56 [2021-11-07 07:56:27,413 INFO L226 Difference]: Without dead ends: 52 [2021-11-07 07:56:27,415 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-11-07 07:56:27,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-11-07 07:56:27,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2021-11-07 07:56:27,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.02) internal successors, (51), 50 states have internal predecessors, (51), 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 07:56:27,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2021-11-07 07:56:27,426 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 48 [2021-11-07 07:56:27,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:27,426 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2021-11-07 07:56:27,426 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.04) internal successors, (51), 25 states have internal predecessors, (51), 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 07:56:27,426 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2021-11-07 07:56:27,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-07 07:56:27,427 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:27,427 INFO L513 BasicCegarLoop]: trace histogram [22, 22, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:27,453 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-07 07:56:27,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:27,642 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:27,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:27,642 INFO L85 PathProgramCache]: Analyzing trace with hash 1293970777, now seen corresponding path program 22 times [2021-11-07 07:56:27,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:27,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049137044] [2021-11-07 07:56:27,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:27,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:27,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:27,942 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:27,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:27,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049137044] [2021-11-07 07:56:27,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049137044] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:27,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944914120] [2021-11-07 07:56:27,943 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:56:27,944 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:27,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:27,945 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:27,965 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-07 07:56:28,158 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:56:28,158 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:56:28,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-07 07:56:28,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:28,309 INFO L134 CoverageAnalysis]: Checked inductivity of 484 backedges. 0 proven. 484 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:28,309 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1944914120] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:28,309 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:28,309 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-11-07 07:56:28,310 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886737179] [2021-11-07 07:56:28,310 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-07 07:56:28,310 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:28,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-07 07:56:28,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-11-07 07:56:28,311 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 states have internal predecessors, (53), 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 07:56:28,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:28,376 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2021-11-07 07:56:28,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-11-07 07:56:28,377 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 states have internal predecessors, (53), 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 50 [2021-11-07 07:56:28,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:28,377 INFO L225 Difference]: With dead ends: 58 [2021-11-07 07:56:28,378 INFO L226 Difference]: Without dead ends: 54 [2021-11-07 07:56:28,378 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 50 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 07:56:28,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-11-07 07:56:28,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 53. [2021-11-07 07:56:28,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 1.0192307692307692) internal successors, (53), 52 states have internal predecessors, (53), 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 07:56:28,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2021-11-07 07:56:28,382 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 50 [2021-11-07 07:56:28,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:28,383 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2021-11-07 07:56:28,383 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 2.0384615384615383) internal successors, (53), 26 states have internal predecessors, (53), 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 07:56:28,383 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2021-11-07 07:56:28,384 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-07 07:56:28,384 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:28,384 INFO L513 BasicCegarLoop]: trace histogram [23, 23, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:28,418 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-11-07 07:56:28,606 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:28,607 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:28,607 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:28,607 INFO L85 PathProgramCache]: Analyzing trace with hash -1981366821, now seen corresponding path program 23 times [2021-11-07 07:56:28,607 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:28,607 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844371183] [2021-11-07 07:56:28,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:28,608 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:28,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:28,957 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:28,957 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:28,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844371183] [2021-11-07 07:56:28,957 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844371183] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:28,957 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569233126] [2021-11-07 07:56:28,957 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:56:28,958 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:28,958 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:28,959 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:28,975 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-07 07:56:29,185 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2021-11-07 07:56:29,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:56:29,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-07 07:56:29,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:29,361 INFO L134 CoverageAnalysis]: Checked inductivity of 529 backedges. 0 proven. 529 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:29,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569233126] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:29,362 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:29,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-11-07 07:56:29,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1945525752] [2021-11-07 07:56:29,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-07 07:56:29,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:29,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-07 07:56:29,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-11-07 07:56:29,364 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 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 07:56:29,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:29,420 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2021-11-07 07:56:29,420 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-07 07:56:29,420 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 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 52 [2021-11-07 07:56:29,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:29,421 INFO L225 Difference]: With dead ends: 60 [2021-11-07 07:56:29,421 INFO L226 Difference]: Without dead ends: 56 [2021-11-07 07:56:29,422 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-11-07 07:56:29,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-11-07 07:56:29,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 55. [2021-11-07 07:56:29,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 1.0185185185185186) internal successors, (55), 54 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 07:56:29,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2021-11-07 07:56:29,425 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 52 [2021-11-07 07:56:29,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:29,425 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2021-11-07 07:56:29,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.037037037037037) internal successors, (55), 27 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 07:56:29,425 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2021-11-07 07:56:29,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-07 07:56:29,426 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:29,426 INFO L513 BasicCegarLoop]: trace histogram [24, 24, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:29,463 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-07 07:56:29,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-07 07:56:29,634 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:29,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:29,634 INFO L85 PathProgramCache]: Analyzing trace with hash -1369770531, now seen corresponding path program 24 times [2021-11-07 07:56:29,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:29,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898598010] [2021-11-07 07:56:29,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:29,635 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:29,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:29,923 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:29,924 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:29,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898598010] [2021-11-07 07:56:29,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898598010] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:29,924 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397121135] [2021-11-07 07:56:29,924 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:56:29,924 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:29,924 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:29,925 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:29,926 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-07 07:56:30,164 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-11-07 07:56:30,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:56:30,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-07 07:56:30,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:30,335 INFO L134 CoverageAnalysis]: Checked inductivity of 576 backedges. 0 proven. 576 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:30,335 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397121135] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:30,335 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:30,335 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 28 [2021-11-07 07:56:30,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654818267] [2021-11-07 07:56:30,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-07 07:56:30,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:30,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-07 07:56:30,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-11-07 07:56:30,338 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 states have internal predecessors, (57), 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 07:56:30,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:30,396 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2021-11-07 07:56:30,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-07 07:56:30,396 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 states have internal predecessors, (57), 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 54 [2021-11-07 07:56:30,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:30,397 INFO L225 Difference]: With dead ends: 62 [2021-11-07 07:56:30,397 INFO L226 Difference]: Without dead ends: 58 [2021-11-07 07:56:30,398 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-11-07 07:56:30,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-11-07 07:56:30,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2021-11-07 07:56:30,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 1.0178571428571428) internal successors, (57), 56 states have internal predecessors, (57), 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 07:56:30,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2021-11-07 07:56:30,401 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 54 [2021-11-07 07:56:30,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:30,401 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2021-11-07 07:56:30,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0357142857142856) internal successors, (57), 28 states have internal predecessors, (57), 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 07:56:30,402 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2021-11-07 07:56:30,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-07 07:56:30,402 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:30,402 INFO L513 BasicCegarLoop]: trace histogram [25, 25, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:30,441 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-11-07 07:56:30,628 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-07 07:56:30,628 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:30,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:30,629 INFO L85 PathProgramCache]: Analyzing trace with hash -2036255393, now seen corresponding path program 25 times [2021-11-07 07:56:30,629 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:30,629 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [691196996] [2021-11-07 07:56:30,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:30,629 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:30,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:30,975 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:30,976 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:30,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [691196996] [2021-11-07 07:56:30,976 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [691196996] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:30,976 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218857218] [2021-11-07 07:56:30,976 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:56:30,976 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:30,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:30,977 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:30,978 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-07 07:56:31,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:31,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-07 07:56:31,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:31,395 INFO L134 CoverageAnalysis]: Checked inductivity of 625 backedges. 0 proven. 625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:31,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1218857218] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:31,395 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:31,395 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 29 [2021-11-07 07:56:31,395 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507942107] [2021-11-07 07:56:31,396 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-07 07:56:31,396 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:31,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-07 07:56:31,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-11-07 07:56:31,397 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 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 07:56:31,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:31,470 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2021-11-07 07:56:31,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-11-07 07:56:31,471 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 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 56 [2021-11-07 07:56:31,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:31,471 INFO L225 Difference]: With dead ends: 64 [2021-11-07 07:56:31,472 INFO L226 Difference]: Without dead ends: 60 [2021-11-07 07:56:31,472 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 56 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 07:56:31,473 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-11-07 07:56:31,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 59. [2021-11-07 07:56:31,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 58 states have (on average 1.0172413793103448) internal successors, (59), 58 states have internal predecessors, (59), 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 07:56:31,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2021-11-07 07:56:31,475 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 56 [2021-11-07 07:56:31,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:31,476 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2021-11-07 07:56:31,476 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.0344827586206895) internal successors, (59), 29 states have internal predecessors, (59), 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 07:56:31,476 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2021-11-07 07:56:31,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-11-07 07:56:31,477 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:31,477 INFO L513 BasicCegarLoop]: trace histogram [26, 26, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:31,514 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-07 07:56:31,701 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-07 07:56:31,702 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:31,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:31,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1716886625, now seen corresponding path program 26 times [2021-11-07 07:56:31,702 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:31,702 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777959214] [2021-11-07 07:56:31,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:31,702 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:31,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:32,086 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:32,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:32,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777959214] [2021-11-07 07:56:32,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777959214] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:32,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236805895] [2021-11-07 07:56:32,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:56:32,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:32,088 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:32,088 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:32,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-07 07:56:32,381 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:56:32,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:56:32,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-07 07:56:32,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:32,585 INFO L134 CoverageAnalysis]: Checked inductivity of 676 backedges. 0 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:32,585 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [236805895] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:32,585 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:32,585 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 30 [2021-11-07 07:56:32,585 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123348588] [2021-11-07 07:56:32,586 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-07 07:56:32,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:32,587 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-07 07:56:32,587 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-11-07 07:56:32,588 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 30 states have internal predecessors, (61), 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 07:56:32,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:32,672 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2021-11-07 07:56:32,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-07 07:56:32,673 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 30 states have internal predecessors, (61), 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 58 [2021-11-07 07:56:32,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:32,674 INFO L225 Difference]: With dead ends: 66 [2021-11-07 07:56:32,674 INFO L226 Difference]: Without dead ends: 62 [2021-11-07 07:56:32,675 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-11-07 07:56:32,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-11-07 07:56:32,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 61. [2021-11-07 07:56:32,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 1.0166666666666666) internal successors, (61), 60 states have internal predecessors, (61), 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 07:56:32,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2021-11-07 07:56:32,678 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 58 [2021-11-07 07:56:32,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:32,678 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2021-11-07 07:56:32,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 30 states have internal predecessors, (61), 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 07:56:32,678 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2021-11-07 07:56:32,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-11-07 07:56:32,679 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:32,679 INFO L513 BasicCegarLoop]: trace histogram [27, 27, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:32,705 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-07 07:56:32,897 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:32,897 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:32,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:32,898 INFO L85 PathProgramCache]: Analyzing trace with hash 713837283, now seen corresponding path program 27 times [2021-11-07 07:56:32,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:32,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453980294] [2021-11-07 07:56:32,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:32,898 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:32,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:33,281 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:33,281 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:33,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453980294] [2021-11-07 07:56:33,282 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453980294] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:33,282 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604232789] [2021-11-07 07:56:33,282 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:56:33,282 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:33,282 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:33,283 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:33,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-07 07:56:33,672 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2021-11-07 07:56:33,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:56:33,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-07 07:56:33,675 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:33,845 INFO L134 CoverageAnalysis]: Checked inductivity of 729 backedges. 0 proven. 729 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:33,845 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604232789] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:33,845 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:33,845 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 31 [2021-11-07 07:56:33,846 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418364637] [2021-11-07 07:56:33,846 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-07 07:56:33,846 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:33,847 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-07 07:56:33,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-11-07 07:56:33,848 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 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 07:56:33,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:33,907 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2021-11-07 07:56:33,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-07 07:56:33,908 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 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 60 [2021-11-07 07:56:33,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:33,908 INFO L225 Difference]: With dead ends: 68 [2021-11-07 07:56:33,909 INFO L226 Difference]: Without dead ends: 64 [2021-11-07 07:56:33,909 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 60 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 07:56:33,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-07 07:56:33,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 63. [2021-11-07 07:56:33,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 1.0161290322580645) internal successors, (63), 62 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 07:56:33,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2021-11-07 07:56:33,912 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 60 [2021-11-07 07:56:33,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:33,913 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2021-11-07 07:56:33,913 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 2.032258064516129) internal successors, (63), 31 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 07:56:33,913 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2021-11-07 07:56:33,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-11-07 07:56:33,914 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:33,914 INFO L513 BasicCegarLoop]: trace histogram [28, 28, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:33,938 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-07 07:56:34,125 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-11-07 07:56:34,126 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:34,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:34,126 INFO L85 PathProgramCache]: Analyzing trace with hash -1143906075, now seen corresponding path program 28 times [2021-11-07 07:56:34,126 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:34,126 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [932025471] [2021-11-07 07:56:34,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:34,126 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:34,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:34,550 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:34,550 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:34,550 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [932025471] [2021-11-07 07:56:34,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [932025471] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:34,551 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190603143] [2021-11-07 07:56:34,551 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:56:34,551 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:34,551 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:34,558 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:34,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-07 07:56:34,873 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:56:34,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:56:34,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-07 07:56:34,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:35,092 INFO L134 CoverageAnalysis]: Checked inductivity of 784 backedges. 0 proven. 784 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:35,092 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190603143] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:35,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:35,093 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-11-07 07:56:35,093 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144888969] [2021-11-07 07:56:35,093 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-07 07:56:35,093 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:35,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-07 07:56:35,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-11-07 07:56:35,095 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 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 07:56:35,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:35,167 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2021-11-07 07:56:35,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-07 07:56:35,168 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 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 62 [2021-11-07 07:56:35,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:35,169 INFO L225 Difference]: With dead ends: 70 [2021-11-07 07:56:35,169 INFO L226 Difference]: Without dead ends: 66 [2021-11-07 07:56:35,170 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-11-07 07:56:35,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-11-07 07:56:35,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 65. [2021-11-07 07:56:35,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 1.015625) internal successors, (65), 64 states have internal predecessors, (65), 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 07:56:35,173 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2021-11-07 07:56:35,173 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 62 [2021-11-07 07:56:35,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:35,173 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2021-11-07 07:56:35,174 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 2.03125) internal successors, (65), 32 states have internal predecessors, (65), 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 07:56:35,174 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2021-11-07 07:56:35,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-11-07 07:56:35,175 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:35,175 INFO L513 BasicCegarLoop]: trace histogram [29, 29, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:35,206 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-07 07:56:35,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-07 07:56:35,398 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:35,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:35,398 INFO L85 PathProgramCache]: Analyzing trace with hash 271122023, now seen corresponding path program 29 times [2021-11-07 07:56:35,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:35,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28095661] [2021-11-07 07:56:35,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:35,399 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:35,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:35,867 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:35,867 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:35,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28095661] [2021-11-07 07:56:35,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28095661] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:35,867 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1534611560] [2021-11-07 07:56:35,867 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:56:35,867 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:35,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:35,869 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:35,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-07 07:56:36,283 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 30 check-sat command(s) [2021-11-07 07:56:36,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:56:36,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-07 07:56:36,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:36,486 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 0 proven. 841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:36,487 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1534611560] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:36,487 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:36,487 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-11-07 07:56:36,487 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19055904] [2021-11-07 07:56:36,488 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-07 07:56:36,488 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:36,488 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-07 07:56:36,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-11-07 07:56:36,489 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 33 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 07:56:36,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:36,551 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2021-11-07 07:56:36,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-07 07:56:36,560 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 33 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 64 [2021-11-07 07:56:36,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:36,561 INFO L225 Difference]: With dead ends: 72 [2021-11-07 07:56:36,561 INFO L226 Difference]: Without dead ends: 68 [2021-11-07 07:56:36,561 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-11-07 07:56:36,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-11-07 07:56:36,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 67. [2021-11-07 07:56:36,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 1.0151515151515151) internal successors, (67), 66 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 07:56:36,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2021-11-07 07:56:36,563 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 64 [2021-11-07 07:56:36,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:36,563 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2021-11-07 07:56:36,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.0303030303030303) internal successors, (67), 33 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 07:56:36,564 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2021-11-07 07:56:36,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-11-07 07:56:36,564 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:36,564 INFO L513 BasicCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:36,591 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-07 07:56:36,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:36,765 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:36,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:36,765 INFO L85 PathProgramCache]: Analyzing trace with hash -1391508631, now seen corresponding path program 30 times [2021-11-07 07:56:36,765 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:36,765 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [304778694] [2021-11-07 07:56:36,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:36,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:36,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:37,196 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:37,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:37,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [304778694] [2021-11-07 07:56:37,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [304778694] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:37,197 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448417403] [2021-11-07 07:56:37,197 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:56:37,197 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:37,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:37,198 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:37,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-07 07:56:37,543 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-11-07 07:56:37,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:56:37,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-07 07:56:37,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:37,773 INFO L134 CoverageAnalysis]: Checked inductivity of 900 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:37,773 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1448417403] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:37,773 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:37,774 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 34 [2021-11-07 07:56:37,774 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903186571] [2021-11-07 07:56:37,774 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-07 07:56:37,774 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:37,775 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-07 07:56:37,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-11-07 07:56:37,776 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 34 states have internal predecessors, (69), 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 07:56:37,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:37,849 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2021-11-07 07:56:37,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-07 07:56:37,849 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 34 states have internal predecessors, (69), 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 66 [2021-11-07 07:56:37,850 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:37,850 INFO L225 Difference]: With dead ends: 74 [2021-11-07 07:56:37,850 INFO L226 Difference]: Without dead ends: 70 [2021-11-07 07:56:37,851 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 66 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 07:56:37,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-11-07 07:56:37,853 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 69. [2021-11-07 07:56:37,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 1.0147058823529411) internal successors, (69), 68 states have internal predecessors, (69), 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 07:56:37,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2021-11-07 07:56:37,855 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 66 [2021-11-07 07:56:37,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:37,855 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2021-11-07 07:56:37,855 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.0294117647058822) internal successors, (69), 34 states have internal predecessors, (69), 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 07:56:37,855 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2021-11-07 07:56:37,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-11-07 07:56:37,856 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:37,856 INFO L513 BasicCegarLoop]: trace histogram [31, 31, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:37,894 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-07 07:56:38,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-07 07:56:38,082 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:38,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:38,082 INFO L85 PathProgramCache]: Analyzing trace with hash -1451733013, now seen corresponding path program 31 times [2021-11-07 07:56:38,082 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:38,082 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1255596432] [2021-11-07 07:56:38,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:38,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:38,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:38,514 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:38,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:38,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1255596432] [2021-11-07 07:56:38,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1255596432] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:38,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738715640] [2021-11-07 07:56:38,515 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:56:38,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:38,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:38,516 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:38,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-07 07:56:38,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:38,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-07 07:56:38,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:39,103 INFO L134 CoverageAnalysis]: Checked inductivity of 961 backedges. 0 proven. 961 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:39,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1738715640] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:39,103 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:39,103 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 35 [2021-11-07 07:56:39,105 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226351244] [2021-11-07 07:56:39,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-07 07:56:39,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:39,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-07 07:56:39,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 07:56:39,108 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 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 07:56:39,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:39,189 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2021-11-07 07:56:39,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-07 07:56:39,190 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 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 68 [2021-11-07 07:56:39,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:39,191 INFO L225 Difference]: With dead ends: 76 [2021-11-07 07:56:39,191 INFO L226 Difference]: Without dead ends: 72 [2021-11-07 07:56:39,193 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-11-07 07:56:39,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-07 07:56:39,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 71. [2021-11-07 07:56:39,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 71 states, 70 states have (on average 1.0142857142857142) internal successors, (71), 70 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 07:56:39,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2021-11-07 07:56:39,198 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 68 [2021-11-07 07:56:39,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:39,198 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2021-11-07 07:56:39,198 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.0285714285714285) internal successors, (71), 35 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 07:56:39,199 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2021-11-07 07:56:39,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-11-07 07:56:39,200 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:39,200 INFO L513 BasicCegarLoop]: trace histogram [32, 32, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:39,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-07 07:56:39,414 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:39,414 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:39,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:39,414 INFO L85 PathProgramCache]: Analyzing trace with hash 802178029, now seen corresponding path program 32 times [2021-11-07 07:56:39,414 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:39,415 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276080335] [2021-11-07 07:56:39,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:39,415 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:39,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:39,991 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:39,991 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:39,991 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276080335] [2021-11-07 07:56:39,991 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276080335] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:39,992 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311272505] [2021-11-07 07:56:39,992 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:56:39,992 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:39,992 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:39,993 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:39,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-07 07:56:40,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:56:40,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:56:40,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-07 07:56:40,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:40,619 INFO L134 CoverageAnalysis]: Checked inductivity of 1024 backedges. 0 proven. 1024 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:40,619 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1311272505] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:40,620 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:40,620 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-11-07 07:56:40,620 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1527942278] [2021-11-07 07:56:40,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-07 07:56:40,621 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:40,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-07 07:56:40,622 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 07:56:40,622 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 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 07:56:40,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:40,702 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2021-11-07 07:56:40,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-07 07:56:40,702 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 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 70 [2021-11-07 07:56:40,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:40,703 INFO L225 Difference]: With dead ends: 78 [2021-11-07 07:56:40,703 INFO L226 Difference]: Without dead ends: 74 [2021-11-07 07:56:40,706 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-11-07 07:56:40,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-11-07 07:56:40,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 73. [2021-11-07 07:56:40,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 1.0138888888888888) internal successors, (73), 72 states have internal predecessors, (73), 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 07:56:40,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2021-11-07 07:56:40,708 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 70 [2021-11-07 07:56:40,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:40,708 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2021-11-07 07:56:40,708 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.0277777777777777) internal successors, (73), 36 states have internal predecessors, (73), 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 07:56:40,708 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2021-11-07 07:56:40,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-11-07 07:56:40,708 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:40,709 INFO L513 BasicCegarLoop]: trace histogram [33, 33, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:40,732 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-07 07:56:40,909 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-11-07 07:56:40,909 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:40,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:40,910 INFO L85 PathProgramCache]: Analyzing trace with hash 2147172207, now seen corresponding path program 33 times [2021-11-07 07:56:40,910 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:40,910 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121102881] [2021-11-07 07:56:40,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:40,910 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:40,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:41,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:41,389 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:41,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121102881] [2021-11-07 07:56:41,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121102881] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:41,389 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457384533] [2021-11-07 07:56:41,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:56:41,389 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:41,389 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:41,390 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:41,391 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-07 07:56:41,802 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 34 check-sat command(s) [2021-11-07 07:56:41,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:56:41,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-07 07:56:41,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:42,021 INFO L134 CoverageAnalysis]: Checked inductivity of 1089 backedges. 0 proven. 1089 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:42,022 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457384533] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:42,022 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:42,022 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-11-07 07:56:42,022 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971641888] [2021-11-07 07:56:42,023 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-07 07:56:42,023 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:42,024 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-07 07:56:42,024 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-11-07 07:56:42,025 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 37 states have internal predecessors, (75), 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 07:56:42,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:42,107 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2021-11-07 07:56:42,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-07 07:56:42,108 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 37 states have internal predecessors, (75), 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 72 [2021-11-07 07:56:42,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:42,109 INFO L225 Difference]: With dead ends: 80 [2021-11-07 07:56:42,109 INFO L226 Difference]: Without dead ends: 76 [2021-11-07 07:56:42,110 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-11-07 07:56:42,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-11-07 07:56:42,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 75. [2021-11-07 07:56:42,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 1.0135135135135136) internal successors, (75), 74 states have internal predecessors, (75), 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 07:56:42,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2021-11-07 07:56:42,114 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 72 [2021-11-07 07:56:42,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:42,114 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2021-11-07 07:56:42,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.027027027027027) internal successors, (75), 37 states have internal predecessors, (75), 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 07:56:42,115 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2021-11-07 07:56:42,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-11-07 07:56:42,115 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:42,115 INFO L513 BasicCegarLoop]: trace histogram [34, 34, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:42,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-07 07:56:42,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-07 07:56:42,330 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:42,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:42,330 INFO L85 PathProgramCache]: Analyzing trace with hash 1901421169, now seen corresponding path program 34 times [2021-11-07 07:56:42,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:42,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267228265] [2021-11-07 07:56:42,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:42,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:42,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:42,814 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:42,815 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:42,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267228265] [2021-11-07 07:56:42,815 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267228265] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:42,815 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [794953014] [2021-11-07 07:56:42,815 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:56:42,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:42,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:42,818 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:42,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-07 07:56:43,235 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:56:43,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:56:43,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-07 07:56:43,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:43,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1156 backedges. 0 proven. 1156 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:43,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [794953014] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:43,442 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:43,442 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 38 [2021-11-07 07:56:43,442 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457814737] [2021-11-07 07:56:43,443 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-07 07:56:43,443 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:43,443 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-07 07:56:43,444 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-11-07 07:56:43,444 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 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 07:56:43,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:43,528 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2021-11-07 07:56:43,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-11-07 07:56:43,528 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 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 74 [2021-11-07 07:56:43,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:43,529 INFO L225 Difference]: With dead ends: 82 [2021-11-07 07:56:43,529 INFO L226 Difference]: Without dead ends: 78 [2021-11-07 07:56:43,530 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-11-07 07:56:43,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-11-07 07:56:43,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 77. [2021-11-07 07:56:43,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 77 states, 76 states have (on average 1.013157894736842) internal successors, (77), 76 states have internal predecessors, (77), 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 07:56:43,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2021-11-07 07:56:43,533 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 74 [2021-11-07 07:56:43,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:43,534 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2021-11-07 07:56:43,534 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 2.026315789473684) internal successors, (77), 38 states have internal predecessors, (77), 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 07:56:43,534 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2021-11-07 07:56:43,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-11-07 07:56:43,535 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:43,535 INFO L513 BasicCegarLoop]: trace histogram [35, 35, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:43,558 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-11-07 07:56:43,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:43,742 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:43,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:43,742 INFO L85 PathProgramCache]: Analyzing trace with hash 1957874931, now seen corresponding path program 35 times [2021-11-07 07:56:43,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:43,742 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129477857] [2021-11-07 07:56:43,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:43,742 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:43,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:44,258 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:44,259 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:44,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129477857] [2021-11-07 07:56:44,259 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129477857] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:44,259 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907859605] [2021-11-07 07:56:44,259 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:56:44,259 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:44,260 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:44,263 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:44,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-07 07:56:44,706 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2021-11-07 07:56:44,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:56:44,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-07 07:56:44,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:44,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:44,929 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907859605] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:44,929 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:44,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 39 [2021-11-07 07:56:44,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038731277] [2021-11-07 07:56:44,930 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-11-07 07:56:44,930 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:44,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-11-07 07:56:44,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-11-07 07:56:44,931 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 39 states have internal predecessors, (79), 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 07:56:45,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:45,029 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2021-11-07 07:56:45,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-07 07:56:45,030 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 39 states have internal predecessors, (79), 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 76 [2021-11-07 07:56:45,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:45,030 INFO L225 Difference]: With dead ends: 84 [2021-11-07 07:56:45,030 INFO L226 Difference]: Without dead ends: 80 [2021-11-07 07:56:45,031 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 113 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-11-07 07:56:45,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-11-07 07:56:45,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 79. [2021-11-07 07:56:45,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 1.0128205128205128) internal successors, (79), 78 states have internal predecessors, (79), 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 07:56:45,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2021-11-07 07:56:45,033 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 76 [2021-11-07 07:56:45,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:45,033 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2021-11-07 07:56:45,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 2.0256410256410255) internal successors, (79), 39 states have internal predecessors, (79), 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 07:56:45,034 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2021-11-07 07:56:45,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-11-07 07:56:45,034 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:45,034 INFO L513 BasicCegarLoop]: trace histogram [36, 36, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:45,056 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-11-07 07:56:45,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:45,235 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:45,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:45,235 INFO L85 PathProgramCache]: Analyzing trace with hash 375365365, now seen corresponding path program 36 times [2021-11-07 07:56:45,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:45,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524997168] [2021-11-07 07:56:45,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:45,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:45,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:45,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:45,787 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:45,787 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524997168] [2021-11-07 07:56:45,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524997168] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:45,788 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338016737] [2021-11-07 07:56:45,788 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:56:45,788 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:45,788 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:45,789 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:45,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-07 07:56:46,264 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2021-11-07 07:56:46,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:56:46,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-07 07:56:46,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:46,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1296 backedges. 0 proven. 1296 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:46,501 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338016737] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:46,501 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:46,502 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 40 [2021-11-07 07:56:46,502 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473248457] [2021-11-07 07:56:46,502 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-11-07 07:56:46,502 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:46,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-11-07 07:56:46,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-11-07 07:56:46,504 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand has 40 states, 40 states have (on average 2.025) internal successors, (81), 40 states have internal predecessors, (81), 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 07:56:46,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:46,587 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2021-11-07 07:56:46,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-07 07:56:46,587 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.025) internal successors, (81), 40 states have internal predecessors, (81), 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 78 [2021-11-07 07:56:46,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:46,588 INFO L225 Difference]: With dead ends: 86 [2021-11-07 07:56:46,588 INFO L226 Difference]: Without dead ends: 82 [2021-11-07 07:56:46,588 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-11-07 07:56:46,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-11-07 07:56:46,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 81. [2021-11-07 07:56:46,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 1.0125) internal successors, (81), 80 states have internal predecessors, (81), 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 07:56:46,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2021-11-07 07:56:46,591 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 78 [2021-11-07 07:56:46,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:46,591 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2021-11-07 07:56:46,591 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.025) internal successors, (81), 40 states have internal predecessors, (81), 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 07:56:46,591 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2021-11-07 07:56:46,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-11-07 07:56:46,592 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:46,592 INFO L513 BasicCegarLoop]: trace histogram [37, 37, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:46,612 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-11-07 07:56:46,792 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-11-07 07:56:46,792 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:46,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:46,793 INFO L85 PathProgramCache]: Analyzing trace with hash 2095223, now seen corresponding path program 37 times [2021-11-07 07:56:46,793 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:46,793 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783262898] [2021-11-07 07:56:46,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:46,793 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:46,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:47,419 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:47,419 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:47,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783262898] [2021-11-07 07:56:47,419 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783262898] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:47,419 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220792503] [2021-11-07 07:56:47,420 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:56:47,420 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:47,420 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:47,421 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:47,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-07 07:56:47,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:47,909 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-07 07:56:47,910 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:48,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1369 backedges. 0 proven. 1369 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:48,136 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [220792503] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:48,136 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:48,137 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 41 [2021-11-07 07:56:48,137 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119708807] [2021-11-07 07:56:48,137 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-07 07:56:48,137 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:48,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-07 07:56:48,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-11-07 07:56:48,138 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 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 07:56:48,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:48,210 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2021-11-07 07:56:48,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-07 07:56:48,211 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 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 80 [2021-11-07 07:56:48,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:48,211 INFO L225 Difference]: With dead ends: 88 [2021-11-07 07:56:48,212 INFO L226 Difference]: Without dead ends: 84 [2021-11-07 07:56:48,213 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-11-07 07:56:48,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-11-07 07:56:48,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 83. [2021-11-07 07:56:48,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 83 states, 82 states have (on average 1.0121951219512195) internal successors, (83), 82 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 07:56:48,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2021-11-07 07:56:48,216 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 80 [2021-11-07 07:56:48,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:48,216 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2021-11-07 07:56:48,217 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 2.024390243902439) internal successors, (83), 41 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 07:56:48,217 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2021-11-07 07:56:48,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-11-07 07:56:48,218 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:48,218 INFO L513 BasicCegarLoop]: trace histogram [38, 38, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:48,239 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-11-07 07:56:48,422 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-07 07:56:48,422 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:48,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:48,422 INFO L85 PathProgramCache]: Analyzing trace with hash 2066741625, now seen corresponding path program 38 times [2021-11-07 07:56:48,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:48,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [457368408] [2021-11-07 07:56:48,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:48,423 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:48,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:49,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:49,044 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:49,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [457368408] [2021-11-07 07:56:49,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [457368408] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:49,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [319176466] [2021-11-07 07:56:49,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:56:49,045 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:49,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:49,045 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:49,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-07 07:56:49,564 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:56:49,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:56:49,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-07 07:56:49,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:49,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1444 backedges. 0 proven. 1444 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:49,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [319176466] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:49,769 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:49,769 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 42 [2021-11-07 07:56:49,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915705248] [2021-11-07 07:56:49,770 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-11-07 07:56:49,770 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:49,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-11-07 07:56:49,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-11-07 07:56:49,773 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand has 42 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 42 states have internal predecessors, (85), 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 07:56:49,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:49,855 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2021-11-07 07:56:49,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-07 07:56:49,856 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 42 states have internal predecessors, (85), 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 82 [2021-11-07 07:56:49,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:49,857 INFO L225 Difference]: With dead ends: 90 [2021-11-07 07:56:49,858 INFO L226 Difference]: Without dead ends: 86 [2021-11-07 07:56:49,859 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-11-07 07:56:49,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-07 07:56:49,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 85. [2021-11-07 07:56:49,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 1.0119047619047619) internal successors, (85), 84 states have internal predecessors, (85), 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 07:56:49,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2021-11-07 07:56:49,862 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 82 [2021-11-07 07:56:49,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:49,862 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2021-11-07 07:56:49,863 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 2.0238095238095237) internal successors, (85), 42 states have internal predecessors, (85), 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 07:56:49,863 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2021-11-07 07:56:49,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-11-07 07:56:49,863 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:49,864 INFO L513 BasicCegarLoop]: trace histogram [39, 39, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:49,898 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-11-07 07:56:50,077 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-07 07:56:50,078 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:50,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:50,078 INFO L85 PathProgramCache]: Analyzing trace with hash 1917043195, now seen corresponding path program 39 times [2021-11-07 07:56:50,078 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:50,078 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868834249] [2021-11-07 07:56:50,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:50,078 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:50,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:50,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:50,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:50,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868834249] [2021-11-07 07:56:50,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1868834249] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:50,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598100091] [2021-11-07 07:56:50,857 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:56:50,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:50,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:50,859 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:50,873 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-07 07:56:51,529 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 40 check-sat command(s) [2021-11-07 07:56:51,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:56:51,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-07 07:56:51,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:51,730 INFO L134 CoverageAnalysis]: Checked inductivity of 1521 backedges. 0 proven. 1521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:51,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598100091] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:51,730 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:51,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 43 [2021-11-07 07:56:51,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766044625] [2021-11-07 07:56:51,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-11-07 07:56:51,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:51,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-11-07 07:56:51,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-11-07 07:56:51,732 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 43 states have internal predecessors, (87), 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 07:56:51,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:51,819 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2021-11-07 07:56:51,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-07 07:56:51,820 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 43 states have internal predecessors, (87), 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 84 [2021-11-07 07:56:51,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:51,820 INFO L225 Difference]: With dead ends: 92 [2021-11-07 07:56:51,820 INFO L226 Difference]: Without dead ends: 88 [2021-11-07 07:56:51,821 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 125 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-11-07 07:56:51,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-11-07 07:56:51,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 87. [2021-11-07 07:56:51,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 1.0116279069767442) internal successors, (87), 86 states have internal predecessors, (87), 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 07:56:51,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2021-11-07 07:56:51,824 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 84 [2021-11-07 07:56:51,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:51,824 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2021-11-07 07:56:51,824 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.0232558139534884) internal successors, (87), 43 states have internal predecessors, (87), 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 07:56:51,824 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2021-11-07 07:56:51,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-11-07 07:56:51,825 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:51,825 INFO L513 BasicCegarLoop]: trace histogram [40, 40, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:51,848 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-11-07 07:56:52,033 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-07 07:56:52,034 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:52,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:52,034 INFO L85 PathProgramCache]: Analyzing trace with hash -209227267, now seen corresponding path program 40 times [2021-11-07 07:56:52,034 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:52,034 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517165792] [2021-11-07 07:56:52,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:52,034 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:52,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:52,777 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:52,777 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:52,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517165792] [2021-11-07 07:56:52,777 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517165792] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:52,777 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384814663] [2021-11-07 07:56:52,777 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:56:52,777 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:52,777 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:52,778 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:52,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-07 07:56:53,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:56:53,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:56:53,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-07 07:56:53,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:53,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1600 backedges. 0 proven. 1600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:53,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [384814663] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:53,569 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:53,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 44 [2021-11-07 07:56:53,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [671192990] [2021-11-07 07:56:53,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-07 07:56:53,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:53,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-07 07:56:53,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-11-07 07:56:53,572 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 44 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 07:56:53,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:53,655 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2021-11-07 07:56:53,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-07 07:56:53,656 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 44 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 86 [2021-11-07 07:56:53,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:53,656 INFO L225 Difference]: With dead ends: 94 [2021-11-07 07:56:53,656 INFO L226 Difference]: Without dead ends: 90 [2021-11-07 07:56:53,657 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-11-07 07:56:53,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-11-07 07:56:53,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 89. [2021-11-07 07:56:53,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 88 states have (on average 1.0113636363636365) internal successors, (89), 88 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 07:56:53,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2021-11-07 07:56:53,659 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 86 [2021-11-07 07:56:53,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:53,660 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2021-11-07 07:56:53,660 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.022727272727273) internal successors, (89), 44 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 07:56:53,660 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2021-11-07 07:56:53,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-11-07 07:56:53,660 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:53,660 INFO L513 BasicCegarLoop]: trace histogram [41, 41, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:53,682 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-11-07 07:56:53,860 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:53,861 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:53,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:53,861 INFO L85 PathProgramCache]: Analyzing trace with hash 849291647, now seen corresponding path program 41 times [2021-11-07 07:56:53,861 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:53,861 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479963421] [2021-11-07 07:56:53,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:53,861 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:53,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:54,658 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:54,659 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:54,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479963421] [2021-11-07 07:56:54,659 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479963421] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:54,659 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086711786] [2021-11-07 07:56:54,659 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:56:54,659 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:54,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:54,660 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:54,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-07 07:56:55,258 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 42 check-sat command(s) [2021-11-07 07:56:55,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:56:55,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-07 07:56:55,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:55,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1681 backedges. 0 proven. 1681 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:55,482 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086711786] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:55,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:55,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 45 [2021-11-07 07:56:55,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [862970111] [2021-11-07 07:56:55,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-11-07 07:56:55,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:55,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-11-07 07:56:55,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-11-07 07:56:55,484 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand has 45 states, 45 states have (on average 2.022222222222222) internal successors, (91), 45 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 07:56:55,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:55,567 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2021-11-07 07:56:55,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-07 07:56:55,568 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 2.022222222222222) internal successors, (91), 45 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 88 [2021-11-07 07:56:55,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:55,568 INFO L225 Difference]: With dead ends: 96 [2021-11-07 07:56:55,569 INFO L226 Difference]: Without dead ends: 92 [2021-11-07 07:56:55,569 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 131 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-11-07 07:56:55,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-11-07 07:56:55,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 91. [2021-11-07 07:56:55,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 1.011111111111111) internal successors, (91), 90 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 07:56:55,573 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2021-11-07 07:56:55,573 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 88 [2021-11-07 07:56:55,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:55,573 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2021-11-07 07:56:55,574 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 2.022222222222222) internal successors, (91), 45 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 07:56:55,574 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2021-11-07 07:56:55,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-11-07 07:56:55,574 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:55,575 INFO L513 BasicCegarLoop]: trace histogram [42, 42, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:55,601 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-11-07 07:56:55,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:55,790 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:55,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:55,790 INFO L85 PathProgramCache]: Analyzing trace with hash 178718849, now seen corresponding path program 42 times [2021-11-07 07:56:55,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:55,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085848632] [2021-11-07 07:56:55,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:55,791 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:55,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:56,605 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:56,605 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:56,605 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085848632] [2021-11-07 07:56:56,606 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085848632] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:56,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557415666] [2021-11-07 07:56:56,606 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:56:56,606 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:56,606 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:56,607 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:56,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-07 07:56:57,245 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2021-11-07 07:56:57,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:56:57,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 44 conjunts are in the unsatisfiable core [2021-11-07 07:56:57,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:57,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1764 backedges. 0 proven. 1764 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:57,480 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557415666] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:57,480 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:57,480 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 46 [2021-11-07 07:56:57,480 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881589959] [2021-11-07 07:56:57,481 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-11-07 07:56:57,481 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:57,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-11-07 07:56:57,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-11-07 07:56:57,482 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 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 07:56:57,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:57,603 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2021-11-07 07:56:57,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-07 07:56:57,603 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 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 90 [2021-11-07 07:56:57,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:57,604 INFO L225 Difference]: With dead ends: 98 [2021-11-07 07:56:57,604 INFO L226 Difference]: Without dead ends: 94 [2021-11-07 07:56:57,604 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-11-07 07:56:57,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-11-07 07:56:57,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 93. [2021-11-07 07:56:57,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 1.0108695652173914) internal successors, (93), 92 states have internal predecessors, (93), 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 07:56:57,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2021-11-07 07:56:57,608 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 90 [2021-11-07 07:56:57,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:57,609 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2021-11-07 07:56:57,609 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.0217391304347827) internal successors, (93), 46 states have internal predecessors, (93), 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 07:56:57,609 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2021-11-07 07:56:57,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-11-07 07:56:57,610 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:57,610 INFO L513 BasicCegarLoop]: trace histogram [43, 43, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:57,632 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-07 07:56:57,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-11-07 07:56:57,817 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:57,817 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:57,817 INFO L85 PathProgramCache]: Analyzing trace with hash 3354371, now seen corresponding path program 43 times [2021-11-07 07:56:57,817 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:57,817 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276073187] [2021-11-07 07:56:57,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:57,818 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:57,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:58,594 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:58,594 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:56:58,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276073187] [2021-11-07 07:56:58,594 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276073187] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:58,594 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956240767] [2021-11-07 07:56:58,594 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:56:58,594 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:58,594 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:56:58,595 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:56:58,596 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-07 07:56:59,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:56:59,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-07 07:56:59,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:56:59,510 INFO L134 CoverageAnalysis]: Checked inductivity of 1849 backedges. 0 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:56:59,510 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956240767] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:56:59,510 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:56:59,510 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 47 [2021-11-07 07:56:59,510 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708827963] [2021-11-07 07:56:59,511 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-11-07 07:56:59,511 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:56:59,511 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-11-07 07:56:59,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-11-07 07:56:59,512 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 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 07:56:59,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:56:59,622 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2021-11-07 07:56:59,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-07 07:56:59,623 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 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 92 [2021-11-07 07:56:59,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:56:59,624 INFO L225 Difference]: With dead ends: 100 [2021-11-07 07:56:59,624 INFO L226 Difference]: Without dead ends: 96 [2021-11-07 07:56:59,625 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-11-07 07:56:59,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-11-07 07:56:59,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 95. [2021-11-07 07:56:59,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 95 states, 94 states have (on average 1.0106382978723405) internal successors, (95), 94 states have internal predecessors, (95), 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 07:56:59,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2021-11-07 07:56:59,628 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 92 [2021-11-07 07:56:59,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:56:59,629 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2021-11-07 07:56:59,629 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.021276595744681) internal successors, (95), 47 states have internal predecessors, (95), 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 07:56:59,629 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2021-11-07 07:56:59,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-11-07 07:56:59,630 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:56:59,630 INFO L513 BasicCegarLoop]: trace histogram [44, 44, 1, 1, 1, 1, 1, 1] [2021-11-07 07:56:59,665 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-11-07 07:56:59,845 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:56:59,846 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:56:59,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:56:59,846 INFO L85 PathProgramCache]: Analyzing trace with hash -1018184443, now seen corresponding path program 44 times [2021-11-07 07:56:59,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:56:59,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575593956] [2021-11-07 07:56:59,846 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:56:59,846 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:56:59,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:57:00,629 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:00,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:57:00,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575593956] [2021-11-07 07:57:00,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [575593956] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:00,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451369451] [2021-11-07 07:57:00,630 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:57:00,631 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:57:00,631 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:57:00,638 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:57:00,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-07 07:57:01,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:57:01,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:57:01,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-07 07:57:01,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:57:01,549 INFO L134 CoverageAnalysis]: Checked inductivity of 1936 backedges. 0 proven. 1936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:01,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451369451] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:01,550 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:57:01,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 48 [2021-11-07 07:57:01,550 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [792189241] [2021-11-07 07:57:01,551 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-07 07:57:01,551 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:57:01,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-07 07:57:01,552 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-11-07 07:57:01,552 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand has 48 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 48 states have internal predecessors, (97), 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 07:57:01,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:57:01,640 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2021-11-07 07:57:01,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-07 07:57:01,640 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 48 states have internal predecessors, (97), 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 94 [2021-11-07 07:57:01,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:57:01,641 INFO L225 Difference]: With dead ends: 102 [2021-11-07 07:57:01,641 INFO L226 Difference]: Without dead ends: 98 [2021-11-07 07:57:01,641 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-11-07 07:57:01,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-11-07 07:57:01,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 97. [2021-11-07 07:57:01,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.0104166666666667) internal successors, (97), 96 states have internal predecessors, (97), 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 07:57:01,644 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2021-11-07 07:57:01,645 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 94 [2021-11-07 07:57:01,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:57:01,645 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2021-11-07 07:57:01,645 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.0208333333333335) internal successors, (97), 48 states have internal predecessors, (97), 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 07:57:01,645 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2021-11-07 07:57:01,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-11-07 07:57:01,646 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:57:01,646 INFO L513 BasicCegarLoop]: trace histogram [45, 45, 1, 1, 1, 1, 1, 1] [2021-11-07 07:57:01,672 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-07 07:57:01,853 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:57:01,854 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:57:01,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:57:01,854 INFO L85 PathProgramCache]: Analyzing trace with hash 830526087, now seen corresponding path program 45 times [2021-11-07 07:57:01,854 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:57:01,854 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [258338182] [2021-11-07 07:57:01,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:57:01,854 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:57:01,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:57:02,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:02,637 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:57:02,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [258338182] [2021-11-07 07:57:02,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [258338182] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:02,638 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472209639] [2021-11-07 07:57:02,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:57:02,638 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:57:02,638 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:57:02,639 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:57:02,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-07 07:57:03,370 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 46 check-sat command(s) [2021-11-07 07:57:03,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:57:03,371 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-07 07:57:03,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:57:03,598 INFO L134 CoverageAnalysis]: Checked inductivity of 2025 backedges. 0 proven. 2025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:03,599 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1472209639] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:03,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:57:03,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 49 [2021-11-07 07:57:03,599 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262244455] [2021-11-07 07:57:03,599 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-11-07 07:57:03,599 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:57:03,600 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-11-07 07:57:03,600 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-11-07 07:57:03,600 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 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 07:57:03,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:57:03,685 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2021-11-07 07:57:03,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-11-07 07:57:03,685 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 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 96 [2021-11-07 07:57:03,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:57:03,686 INFO L225 Difference]: With dead ends: 104 [2021-11-07 07:57:03,686 INFO L226 Difference]: Without dead ends: 100 [2021-11-07 07:57:03,686 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 143 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-11-07 07:57:03,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-11-07 07:57:03,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 99. [2021-11-07 07:57:03,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 99 states, 98 states have (on average 1.010204081632653) internal successors, (99), 98 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 07:57:03,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2021-11-07 07:57:03,690 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 96 [2021-11-07 07:57:03,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:57:03,690 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2021-11-07 07:57:03,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 2.020408163265306) internal successors, (99), 49 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 07:57:03,691 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2021-11-07 07:57:03,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-11-07 07:57:03,691 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:57:03,691 INFO L513 BasicCegarLoop]: trace histogram [46, 46, 1, 1, 1, 1, 1, 1] [2021-11-07 07:57:03,713 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-11-07 07:57:03,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-11-07 07:57:03,892 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:57:03,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:57:03,892 INFO L85 PathProgramCache]: Analyzing trace with hash -675115127, now seen corresponding path program 46 times [2021-11-07 07:57:03,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:57:03,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [178589996] [2021-11-07 07:57:03,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:57:03,892 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:57:03,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:57:04,905 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:04,905 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:57:04,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [178589996] [2021-11-07 07:57:04,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [178589996] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:04,906 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [170421750] [2021-11-07 07:57:04,906 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:57:04,906 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:57:04,906 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:57:04,907 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:57:04,924 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-07 07:57:05,860 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:57:05,860 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:57:05,861 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-07 07:57:05,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:57:06,161 INFO L134 CoverageAnalysis]: Checked inductivity of 2116 backedges. 0 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:06,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [170421750] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:06,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:57:06,162 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 50 [2021-11-07 07:57:06,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696510947] [2021-11-07 07:57:06,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-07 07:57:06,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:57:06,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-07 07:57:06,164 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2021-11-07 07:57:06,164 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 50 states, 50 states have (on average 2.02) internal successors, (101), 50 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 07:57:06,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:57:06,291 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2021-11-07 07:57:06,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-07 07:57:06,292 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 2.02) internal successors, (101), 50 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 98 [2021-11-07 07:57:06,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:57:06,293 INFO L225 Difference]: With dead ends: 106 [2021-11-07 07:57:06,293 INFO L226 Difference]: Without dead ends: 102 [2021-11-07 07:57:06,294 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2021-11-07 07:57:06,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-11-07 07:57:06,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 101. [2021-11-07 07:57:06,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 101 states, 100 states have (on average 1.01) internal successors, (101), 100 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 07:57:06,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2021-11-07 07:57:06,298 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 98 [2021-11-07 07:57:06,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:57:06,298 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2021-11-07 07:57:06,299 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 2.02) internal successors, (101), 50 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 07:57:06,299 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2021-11-07 07:57:06,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-11-07 07:57:06,300 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:57:06,300 INFO L513 BasicCegarLoop]: trace histogram [47, 47, 1, 1, 1, 1, 1, 1] [2021-11-07 07:57:06,332 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-07 07:57:06,525 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-07 07:57:06,526 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:57:06,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:57:06,526 INFO L85 PathProgramCache]: Analyzing trace with hash -192343029, now seen corresponding path program 47 times [2021-11-07 07:57:06,526 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:57:06,526 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857028935] [2021-11-07 07:57:06,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:57:06,527 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:57:06,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:57:07,407 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:07,407 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:57:07,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857028935] [2021-11-07 07:57:07,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857028935] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:07,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [193618266] [2021-11-07 07:57:07,408 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:57:07,408 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:57:07,408 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:57:07,409 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:57:07,409 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-07 07:57:08,184 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 48 check-sat command(s) [2021-11-07 07:57:08,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:57:08,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-07 07:57:08,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:57:08,472 INFO L134 CoverageAnalysis]: Checked inductivity of 2209 backedges. 0 proven. 2209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:08,472 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [193618266] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:08,472 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:57:08,472 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 51 [2021-11-07 07:57:08,473 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208313413] [2021-11-07 07:57:08,473 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-11-07 07:57:08,473 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:57:08,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-11-07 07:57:08,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-11-07 07:57:08,475 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 51 states have internal predecessors, (103), 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 07:57:08,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:57:08,574 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2021-11-07 07:57:08,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-07 07:57:08,575 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 51 states have internal predecessors, (103), 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 100 [2021-11-07 07:57:08,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:57:08,576 INFO L225 Difference]: With dead ends: 108 [2021-11-07 07:57:08,576 INFO L226 Difference]: Without dead ends: 104 [2021-11-07 07:57:08,577 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-11-07 07:57:08,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-11-07 07:57:08,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 103. [2021-11-07 07:57:08,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 103 states, 102 states have (on average 1.0098039215686274) internal successors, (103), 102 states have internal predecessors, (103), 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 07:57:08,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2021-11-07 07:57:08,580 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 100 [2021-11-07 07:57:08,581 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:57:08,581 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2021-11-07 07:57:08,581 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 2.019607843137255) internal successors, (103), 51 states have internal predecessors, (103), 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 07:57:08,581 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2021-11-07 07:57:08,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-11-07 07:57:08,582 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:57:08,582 INFO L513 BasicCegarLoop]: trace histogram [48, 48, 1, 1, 1, 1, 1, 1] [2021-11-07 07:57:08,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-11-07 07:57:08,797 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-07 07:57:08,798 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:57:08,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:57:08,798 INFO L85 PathProgramCache]: Analyzing trace with hash -104824819, now seen corresponding path program 48 times [2021-11-07 07:57:08,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:57:08,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140516490] [2021-11-07 07:57:08,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:57:08,798 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:57:08,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:57:09,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:09,720 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:57:09,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140516490] [2021-11-07 07:57:09,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140516490] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:09,720 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510323571] [2021-11-07 07:57:09,721 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:57:09,721 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:57:09,721 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:57:09,722 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:57:09,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-07 07:57:10,536 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2021-11-07 07:57:10,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:57:10,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 50 conjunts are in the unsatisfiable core [2021-11-07 07:57:10,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:57:10,859 INFO L134 CoverageAnalysis]: Checked inductivity of 2304 backedges. 0 proven. 2304 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:10,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510323571] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:10,859 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:57:10,859 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 52 [2021-11-07 07:57:10,860 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044873719] [2021-11-07 07:57:10,860 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-11-07 07:57:10,860 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:57:10,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-11-07 07:57:10,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-11-07 07:57:10,861 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand has 52 states, 52 states have (on average 2.019230769230769) internal successors, (105), 52 states have internal predecessors, (105), 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 07:57:10,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:57:10,992 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2021-11-07 07:57:10,993 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-07 07:57:10,993 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.019230769230769) internal successors, (105), 52 states have internal predecessors, (105), 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 102 [2021-11-07 07:57:10,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:57:10,994 INFO L225 Difference]: With dead ends: 110 [2021-11-07 07:57:10,994 INFO L226 Difference]: Without dead ends: 106 [2021-11-07 07:57:10,995 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-11-07 07:57:10,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-11-07 07:57:10,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2021-11-07 07:57:10,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 104 states have (on average 1.0096153846153846) internal successors, (105), 104 states have internal predecessors, (105), 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 07:57:10,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2021-11-07 07:57:10,999 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 102 [2021-11-07 07:57:10,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:57:10,999 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2021-11-07 07:57:11,000 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.019230769230769) internal successors, (105), 52 states have internal predecessors, (105), 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 07:57:11,001 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2021-11-07 07:57:11,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-11-07 07:57:11,001 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:57:11,002 INFO L513 BasicCegarLoop]: trace histogram [49, 49, 1, 1, 1, 1, 1, 1] [2021-11-07 07:57:11,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-11-07 07:57:11,217 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:57:11,218 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:57:11,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:57:11,218 INFO L85 PathProgramCache]: Analyzing trace with hash -1899170929, now seen corresponding path program 49 times [2021-11-07 07:57:11,218 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:57:11,218 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925619308] [2021-11-07 07:57:11,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:57:11,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:57:11,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:57:12,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:12,343 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:57:12,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925619308] [2021-11-07 07:57:12,343 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925619308] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:12,343 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676219930] [2021-11-07 07:57:12,343 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:57:12,343 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:57:12,344 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:57:12,344 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:57:12,346 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-07 07:57:13,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:57:13,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 182 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-07 07:57:13,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:57:13,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2401 backedges. 0 proven. 2401 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:13,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1676219930] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:13,446 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:57:13,446 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 53 [2021-11-07 07:57:13,447 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426510974] [2021-11-07 07:57:13,447 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-11-07 07:57:13,447 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:57:13,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-11-07 07:57:13,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-11-07 07:57:13,449 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand has 53 states, 53 states have (on average 2.018867924528302) internal successors, (107), 53 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 07:57:13,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:57:13,586 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2021-11-07 07:57:13,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-11-07 07:57:13,586 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.018867924528302) internal successors, (107), 53 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 104 [2021-11-07 07:57:13,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:57:13,587 INFO L225 Difference]: With dead ends: 112 [2021-11-07 07:57:13,587 INFO L226 Difference]: Without dead ends: 108 [2021-11-07 07:57:13,587 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 155 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-11-07 07:57:13,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-11-07 07:57:13,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 107. [2021-11-07 07:57:13,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 107 states, 106 states have (on average 1.009433962264151) internal successors, (107), 106 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 07:57:13,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2021-11-07 07:57:13,595 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 104 [2021-11-07 07:57:13,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:57:13,595 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2021-11-07 07:57:13,595 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.018867924528302) internal successors, (107), 53 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 07:57:13,596 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2021-11-07 07:57:13,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-11-07 07:57:13,596 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:57:13,596 INFO L513 BasicCegarLoop]: trace histogram [50, 50, 1, 1, 1, 1, 1, 1] [2021-11-07 07:57:13,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-11-07 07:57:13,813 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-11-07 07:57:13,814 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:57:13,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:57:13,814 INFO L85 PathProgramCache]: Analyzing trace with hash 311070353, now seen corresponding path program 50 times [2021-11-07 07:57:13,814 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:57:13,814 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296700578] [2021-11-07 07:57:13,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:57:13,814 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:57:13,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:57:14,802 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:14,803 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:57:14,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296700578] [2021-11-07 07:57:14,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296700578] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:14,803 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2087087901] [2021-11-07 07:57:14,803 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:57:14,803 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:57:14,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:57:14,805 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:57:14,806 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-07 07:57:15,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:57:15,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:57:15,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 52 conjunts are in the unsatisfiable core [2021-11-07 07:57:15,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:57:15,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2500 backedges. 0 proven. 2500 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:15,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2087087901] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:15,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:57:15,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 54 [2021-11-07 07:57:15,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [606016139] [2021-11-07 07:57:15,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-11-07 07:57:15,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:57:15,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-11-07 07:57:15,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-11-07 07:57:15,934 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand has 54 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 54 states have internal predecessors, (109), 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 07:57:16,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:57:16,058 INFO L93 Difference]: Finished difference Result 114 states and 114 transitions. [2021-11-07 07:57:16,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-07 07:57:16,059 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 54 states have internal predecessors, (109), 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 106 [2021-11-07 07:57:16,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:57:16,060 INFO L225 Difference]: With dead ends: 114 [2021-11-07 07:57:16,060 INFO L226 Difference]: Without dead ends: 110 [2021-11-07 07:57:16,061 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-11-07 07:57:16,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-11-07 07:57:16,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 109. [2021-11-07 07:57:16,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 108 states have (on average 1.0092592592592593) internal successors, (109), 108 states have internal predecessors, (109), 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 07:57:16,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2021-11-07 07:57:16,064 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 106 [2021-11-07 07:57:16,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:57:16,065 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2021-11-07 07:57:16,065 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 2.0185185185185186) internal successors, (109), 54 states have internal predecessors, (109), 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 07:57:16,065 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2021-11-07 07:57:16,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-11-07 07:57:16,066 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:57:16,066 INFO L513 BasicCegarLoop]: trace histogram [51, 51, 1, 1, 1, 1, 1, 1] [2021-11-07 07:57:16,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-11-07 07:57:16,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:57:16,282 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:57:16,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:57:16,282 INFO L85 PathProgramCache]: Analyzing trace with hash -1655869165, now seen corresponding path program 51 times [2021-11-07 07:57:16,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:57:16,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105122494] [2021-11-07 07:57:16,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:57:16,283 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:57:16,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:57:17,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:17,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:57:17,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105122494] [2021-11-07 07:57:17,437 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [105122494] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:17,437 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [251542838] [2021-11-07 07:57:17,437 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:57:17,437 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:57:17,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:57:17,438 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:57:17,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-07 07:57:18,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 52 check-sat command(s) [2021-11-07 07:57:18,360 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:57:18,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-07 07:57:18,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:57:18,651 INFO L134 CoverageAnalysis]: Checked inductivity of 2601 backedges. 0 proven. 2601 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:18,652 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [251542838] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:18,652 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:57:18,652 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 55 [2021-11-07 07:57:18,652 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140801765] [2021-11-07 07:57:18,653 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-11-07 07:57:18,653 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:57:18,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-11-07 07:57:18,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2021-11-07 07:57:18,654 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand has 55 states, 55 states have (on average 2.018181818181818) internal successors, (111), 55 states have internal predecessors, (111), 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 07:57:18,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:57:18,790 INFO L93 Difference]: Finished difference Result 116 states and 116 transitions. [2021-11-07 07:57:18,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-11-07 07:57:18,792 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 2.018181818181818) internal successors, (111), 55 states have internal predecessors, (111), 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 108 [2021-11-07 07:57:18,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:57:18,793 INFO L225 Difference]: With dead ends: 116 [2021-11-07 07:57:18,793 INFO L226 Difference]: Without dead ends: 112 [2021-11-07 07:57:18,794 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 161 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2021-11-07 07:57:18,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-11-07 07:57:18,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 111. [2021-11-07 07:57:18,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.009090909090909) internal successors, (111), 110 states have internal predecessors, (111), 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 07:57:18,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 111 transitions. [2021-11-07 07:57:18,798 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 111 transitions. Word has length 108 [2021-11-07 07:57:18,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:57:18,799 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 111 transitions. [2021-11-07 07:57:18,799 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 2.018181818181818) internal successors, (111), 55 states have internal predecessors, (111), 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 07:57:18,799 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 111 transitions. [2021-11-07 07:57:18,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2021-11-07 07:57:18,800 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:57:18,800 INFO L513 BasicCegarLoop]: trace histogram [52, 52, 1, 1, 1, 1, 1, 1] [2021-11-07 07:57:18,837 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-11-07 07:57:19,013 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:57:19,014 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:57:19,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:57:19,014 INFO L85 PathProgramCache]: Analyzing trace with hash -2099135723, now seen corresponding path program 52 times [2021-11-07 07:57:19,014 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:57:19,014 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504352875] [2021-11-07 07:57:19,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:57:19,014 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:57:19,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:57:20,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:20,292 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:57:20,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504352875] [2021-11-07 07:57:20,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504352875] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:20,292 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1115137724] [2021-11-07 07:57:20,292 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:57:20,292 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:57:20,293 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:57:20,293 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:57:20,294 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-07 07:57:21,226 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:57:21,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:57:21,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 54 conjunts are in the unsatisfiable core [2021-11-07 07:57:21,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:57:21,592 INFO L134 CoverageAnalysis]: Checked inductivity of 2704 backedges. 0 proven. 2704 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:21,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1115137724] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:21,593 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:57:21,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 56 [2021-11-07 07:57:21,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [171622361] [2021-11-07 07:57:21,594 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-11-07 07:57:21,594 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:57:21,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-11-07 07:57:21,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2021-11-07 07:57:21,596 INFO L87 Difference]: Start difference. First operand 111 states and 111 transitions. Second operand has 56 states, 56 states have (on average 2.017857142857143) internal successors, (113), 56 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 07:57:21,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:57:21,744 INFO L93 Difference]: Finished difference Result 118 states and 118 transitions. [2021-11-07 07:57:21,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-07 07:57:21,745 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.017857142857143) internal successors, (113), 56 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 110 [2021-11-07 07:57:21,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:57:21,746 INFO L225 Difference]: With dead ends: 118 [2021-11-07 07:57:21,746 INFO L226 Difference]: Without dead ends: 114 [2021-11-07 07:57:21,747 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 110 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2021-11-07 07:57:21,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-11-07 07:57:21,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 113. [2021-11-07 07:57:21,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 113 states, 112 states have (on average 1.0089285714285714) internal successors, (113), 112 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 07:57:21,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 113 transitions. [2021-11-07 07:57:21,751 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 113 transitions. Word has length 110 [2021-11-07 07:57:21,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:57:21,752 INFO L470 AbstractCegarLoop]: Abstraction has 113 states and 113 transitions. [2021-11-07 07:57:21,752 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.017857142857143) internal successors, (113), 56 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 07:57:21,752 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 113 transitions. [2021-11-07 07:57:21,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 113 [2021-11-07 07:57:21,753 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:57:21,753 INFO L513 BasicCegarLoop]: trace histogram [53, 53, 1, 1, 1, 1, 1, 1] [2021-11-07 07:57:21,794 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-11-07 07:57:21,969 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-11-07 07:57:21,970 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:57:21,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:57:21,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1418431639, now seen corresponding path program 53 times [2021-11-07 07:57:21,970 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:57:21,970 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010572365] [2021-11-07 07:57:21,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:57:21,971 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:57:21,999 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:57:23,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:23,082 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:57:23,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010572365] [2021-11-07 07:57:23,082 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010572365] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:23,082 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468204594] [2021-11-07 07:57:23,082 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:57:23,082 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:57:23,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:57:23,083 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:57:23,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-07 07:57:24,053 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 54 check-sat command(s) [2021-11-07 07:57:24,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:57:24,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 194 conjuncts, 55 conjunts are in the unsatisfiable core [2021-11-07 07:57:24,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:57:24,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2809 backedges. 0 proven. 2809 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:24,308 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [468204594] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:24,308 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:57:24,308 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 57 [2021-11-07 07:57:24,308 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448720365] [2021-11-07 07:57:24,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-11-07 07:57:24,309 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:57:24,309 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-11-07 07:57:24,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2021-11-07 07:57:24,310 INFO L87 Difference]: Start difference. First operand 113 states and 113 transitions. Second operand has 57 states, 57 states have (on average 2.017543859649123) internal successors, (115), 57 states have internal predecessors, (115), 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 07:57:24,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:57:24,431 INFO L93 Difference]: Finished difference Result 120 states and 120 transitions. [2021-11-07 07:57:24,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-11-07 07:57:24,432 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.017543859649123) internal successors, (115), 57 states have internal predecessors, (115), 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 112 [2021-11-07 07:57:24,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:57:24,432 INFO L225 Difference]: With dead ends: 120 [2021-11-07 07:57:24,432 INFO L226 Difference]: Without dead ends: 116 [2021-11-07 07:57:24,433 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2021-11-07 07:57:24,433 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-11-07 07:57:24,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 115. [2021-11-07 07:57:24,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 114 states have (on average 1.0087719298245614) internal successors, (115), 114 states have internal predecessors, (115), 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 07:57:24,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 115 transitions. [2021-11-07 07:57:24,436 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 115 transitions. Word has length 112 [2021-11-07 07:57:24,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:57:24,437 INFO L470 AbstractCegarLoop]: Abstraction has 115 states and 115 transitions. [2021-11-07 07:57:24,437 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.017543859649123) internal successors, (115), 57 states have internal predecessors, (115), 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 07:57:24,437 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 115 transitions. [2021-11-07 07:57:24,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 115 [2021-11-07 07:57:24,438 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:57:24,438 INFO L513 BasicCegarLoop]: trace histogram [54, 54, 1, 1, 1, 1, 1, 1] [2021-11-07 07:57:24,474 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-11-07 07:57:24,653 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:57:24,654 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:57:24,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:57:24,654 INFO L85 PathProgramCache]: Analyzing trace with hash 1661404569, now seen corresponding path program 54 times [2021-11-07 07:57:24,654 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:57:24,654 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663325814] [2021-11-07 07:57:24,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:57:24,654 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:57:24,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:57:25,841 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:25,842 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:57:25,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663325814] [2021-11-07 07:57:25,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663325814] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:25,842 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1820352701] [2021-11-07 07:57:25,843 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:57:25,843 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:57:25,843 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:57:25,844 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:57:25,860 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-11-07 07:57:26,903 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 55 check-sat command(s) [2021-11-07 07:57:26,903 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:57:26,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-07 07:57:26,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:57:27,185 INFO L134 CoverageAnalysis]: Checked inductivity of 2916 backedges. 0 proven. 2916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:27,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1820352701] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:27,185 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:57:27,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 58 [2021-11-07 07:57:27,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110226926] [2021-11-07 07:57:27,185 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-11-07 07:57:27,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:57:27,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-11-07 07:57:27,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2021-11-07 07:57:27,187 INFO L87 Difference]: Start difference. First operand 115 states and 115 transitions. Second operand has 58 states, 58 states have (on average 2.0172413793103448) internal successors, (117), 58 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 07:57:27,318 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:57:27,318 INFO L93 Difference]: Finished difference Result 122 states and 122 transitions. [2021-11-07 07:57:27,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-11-07 07:57:27,319 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.0172413793103448) internal successors, (117), 58 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 114 [2021-11-07 07:57:27,319 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:57:27,319 INFO L225 Difference]: With dead ends: 122 [2021-11-07 07:57:27,319 INFO L226 Difference]: Without dead ends: 118 [2021-11-07 07:57:27,320 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2021-11-07 07:57:27,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-11-07 07:57:27,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 117. [2021-11-07 07:57:27,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 117 states, 116 states have (on average 1.0086206896551724) internal successors, (117), 116 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 07:57:27,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 117 transitions. [2021-11-07 07:57:27,326 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 117 transitions. Word has length 114 [2021-11-07 07:57:27,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:57:27,326 INFO L470 AbstractCegarLoop]: Abstraction has 117 states and 117 transitions. [2021-11-07 07:57:27,326 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.0172413793103448) internal successors, (117), 58 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 07:57:27,327 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 117 transitions. [2021-11-07 07:57:27,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 117 [2021-11-07 07:57:27,327 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:57:27,328 INFO L513 BasicCegarLoop]: trace histogram [55, 55, 1, 1, 1, 1, 1, 1] [2021-11-07 07:57:27,351 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-11-07 07:57:27,541 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-11-07 07:57:27,542 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:57:27,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:57:27,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1064810981, now seen corresponding path program 55 times [2021-11-07 07:57:27,542 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:57:27,542 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078874205] [2021-11-07 07:57:27,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:57:27,543 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:57:27,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:57:28,683 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:28,683 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:57:28,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078874205] [2021-11-07 07:57:28,684 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2078874205] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:28,684 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952586219] [2021-11-07 07:57:28,684 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:57:28,684 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:57:28,684 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:57:28,685 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:57:28,685 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-11-07 07:57:29,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:57:29,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 57 conjunts are in the unsatisfiable core [2021-11-07 07:57:29,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:57:30,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3025 backedges. 0 proven. 3025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:30,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952586219] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:30,020 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:57:30,021 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 59 [2021-11-07 07:57:30,021 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463805263] [2021-11-07 07:57:30,021 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-11-07 07:57:30,021 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:57:30,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-11-07 07:57:30,022 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2021-11-07 07:57:30,023 INFO L87 Difference]: Start difference. First operand 117 states and 117 transitions. Second operand has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 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 07:57:30,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:57:30,169 INFO L93 Difference]: Finished difference Result 124 states and 124 transitions. [2021-11-07 07:57:30,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-07 07:57:30,170 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 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 116 [2021-11-07 07:57:30,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:57:30,171 INFO L225 Difference]: With dead ends: 124 [2021-11-07 07:57:30,171 INFO L226 Difference]: Without dead ends: 120 [2021-11-07 07:57:30,172 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 173 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2021-11-07 07:57:30,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2021-11-07 07:57:30,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 119. [2021-11-07 07:57:30,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 119 states, 118 states have (on average 1.0084745762711864) internal successors, (119), 118 states have internal predecessors, (119), 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 07:57:30,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 119 transitions. [2021-11-07 07:57:30,175 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 119 transitions. Word has length 116 [2021-11-07 07:57:30,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:57:30,176 INFO L470 AbstractCegarLoop]: Abstraction has 119 states and 119 transitions. [2021-11-07 07:57:30,176 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 2.016949152542373) internal successors, (119), 59 states have internal predecessors, (119), 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 07:57:30,176 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 119 transitions. [2021-11-07 07:57:30,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 119 [2021-11-07 07:57:30,177 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:57:30,177 INFO L513 BasicCegarLoop]: trace histogram [56, 56, 1, 1, 1, 1, 1, 1] [2021-11-07 07:57:30,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Forceful destruction successful, exit code 0 [2021-11-07 07:57:30,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-11-07 07:57:30,378 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:57:30,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:57:30,378 INFO L85 PathProgramCache]: Analyzing trace with hash -1027903971, now seen corresponding path program 56 times [2021-11-07 07:57:30,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:57:30,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005650761] [2021-11-07 07:57:30,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:57:30,379 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:57:30,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:57:31,586 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:31,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:57:31,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005650761] [2021-11-07 07:57:31,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005650761] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:31,587 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1277335925] [2021-11-07 07:57:31,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:57:31,587 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:57:31,587 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:57:31,587 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:57:31,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-11-07 07:57:32,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:57:32,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:57:32,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 58 conjunts are in the unsatisfiable core [2021-11-07 07:57:32,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:57:32,912 INFO L134 CoverageAnalysis]: Checked inductivity of 3136 backedges. 0 proven. 3136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:32,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1277335925] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:32,913 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:57:32,913 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 60 [2021-11-07 07:57:32,913 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236980245] [2021-11-07 07:57:32,913 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-11-07 07:57:32,914 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:57:32,914 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-11-07 07:57:32,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2021-11-07 07:57:32,915 INFO L87 Difference]: Start difference. First operand 119 states and 119 transitions. Second operand has 60 states, 60 states have (on average 2.0166666666666666) internal successors, (121), 60 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 07:57:33,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:57:33,076 INFO L93 Difference]: Finished difference Result 126 states and 126 transitions. [2021-11-07 07:57:33,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-11-07 07:57:33,077 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.0166666666666666) internal successors, (121), 60 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 118 [2021-11-07 07:57:33,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:57:33,078 INFO L225 Difference]: With dead ends: 126 [2021-11-07 07:57:33,078 INFO L226 Difference]: Without dead ends: 122 [2021-11-07 07:57:33,079 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 118 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2021-11-07 07:57:33,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-11-07 07:57:33,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 121. [2021-11-07 07:57:33,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.0083333333333333) internal successors, (121), 120 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 07:57:33,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 121 transitions. [2021-11-07 07:57:33,083 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 121 transitions. Word has length 118 [2021-11-07 07:57:33,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:57:33,083 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 121 transitions. [2021-11-07 07:57:33,084 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.0166666666666666) internal successors, (121), 60 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 07:57:33,084 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 121 transitions. [2021-11-07 07:57:33,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 121 [2021-11-07 07:57:33,085 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:57:33,085 INFO L513 BasicCegarLoop]: trace histogram [57, 57, 1, 1, 1, 1, 1, 1] [2021-11-07 07:57:33,129 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-11-07 07:57:33,305 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:57:33,305 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:57:33,305 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:57:33,305 INFO L85 PathProgramCache]: Analyzing trace with hash 79994271, now seen corresponding path program 57 times [2021-11-07 07:57:33,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:57:33,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755088705] [2021-11-07 07:57:33,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:57:33,306 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:57:33,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:57:34,644 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:34,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:57:34,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755088705] [2021-11-07 07:57:34,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1755088705] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:34,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773021351] [2021-11-07 07:57:34,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:57:34,645 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:57:34,645 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:57:34,646 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:57:34,647 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-11-07 07:57:35,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 58 check-sat command(s) [2021-11-07 07:57:35,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:57:35,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-07 07:57:35,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:57:36,084 INFO L134 CoverageAnalysis]: Checked inductivity of 3249 backedges. 0 proven. 3249 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:36,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773021351] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:36,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:57:36,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 61 [2021-11-07 07:57:36,085 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685730132] [2021-11-07 07:57:36,085 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-11-07 07:57:36,086 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:57:36,086 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-11-07 07:57:36,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2021-11-07 07:57:36,087 INFO L87 Difference]: Start difference. First operand 121 states and 121 transitions. Second operand has 61 states, 61 states have (on average 2.0163934426229506) internal successors, (123), 61 states have internal predecessors, (123), 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 07:57:36,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:57:36,204 INFO L93 Difference]: Finished difference Result 128 states and 128 transitions. [2021-11-07 07:57:36,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-11-07 07:57:36,205 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 2.0163934426229506) internal successors, (123), 61 states have internal predecessors, (123), 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 120 [2021-11-07 07:57:36,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:57:36,206 INFO L225 Difference]: With dead ends: 128 [2021-11-07 07:57:36,206 INFO L226 Difference]: Without dead ends: 124 [2021-11-07 07:57:36,206 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 179 GetRequests, 120 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2021-11-07 07:57:36,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-11-07 07:57:36,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 123. [2021-11-07 07:57:36,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 123 states, 122 states have (on average 1.0081967213114753) internal successors, (123), 122 states have internal predecessors, (123), 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 07:57:36,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 123 transitions. [2021-11-07 07:57:36,210 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 123 transitions. Word has length 120 [2021-11-07 07:57:36,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:57:36,211 INFO L470 AbstractCegarLoop]: Abstraction has 123 states and 123 transitions. [2021-11-07 07:57:36,211 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 2.0163934426229506) internal successors, (123), 61 states have internal predecessors, (123), 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 07:57:36,211 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 123 transitions. [2021-11-07 07:57:36,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 123 [2021-11-07 07:57:36,212 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:57:36,212 INFO L513 BasicCegarLoop]: trace histogram [58, 58, 1, 1, 1, 1, 1, 1] [2021-11-07 07:57:36,244 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-11-07 07:57:36,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:57:36,430 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:57:36,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:57:36,430 INFO L85 PathProgramCache]: Analyzing trace with hash -381684575, now seen corresponding path program 58 times [2021-11-07 07:57:36,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:57:36,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146975932] [2021-11-07 07:57:36,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:57:36,431 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:57:36,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:57:37,737 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:37,737 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:57:37,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146975932] [2021-11-07 07:57:37,738 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146975932] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:37,738 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1407122665] [2021-11-07 07:57:37,738 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:57:37,738 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:57:37,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:57:37,739 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:57:37,740 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-11-07 07:57:38,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:57:38,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:57:38,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-07 07:57:38,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:57:39,134 INFO L134 CoverageAnalysis]: Checked inductivity of 3364 backedges. 0 proven. 3364 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:39,134 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1407122665] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:39,134 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:57:39,134 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 62 [2021-11-07 07:57:39,134 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273370894] [2021-11-07 07:57:39,134 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-11-07 07:57:39,135 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:57:39,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-11-07 07:57:39,135 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2021-11-07 07:57:39,135 INFO L87 Difference]: Start difference. First operand 123 states and 123 transitions. Second operand has 62 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 62 states have internal predecessors, (125), 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 07:57:39,256 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:57:39,256 INFO L93 Difference]: Finished difference Result 130 states and 130 transitions. [2021-11-07 07:57:39,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-11-07 07:57:39,257 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 62 states have internal predecessors, (125), 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 122 [2021-11-07 07:57:39,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:57:39,258 INFO L225 Difference]: With dead ends: 130 [2021-11-07 07:57:39,258 INFO L226 Difference]: Without dead ends: 126 [2021-11-07 07:57:39,258 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2021-11-07 07:57:39,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2021-11-07 07:57:39,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 125. [2021-11-07 07:57:39,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 124 states have (on average 1.0080645161290323) internal successors, (125), 124 states have internal predecessors, (125), 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 07:57:39,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 125 transitions. [2021-11-07 07:57:39,262 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 125 transitions. Word has length 122 [2021-11-07 07:57:39,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:57:39,262 INFO L470 AbstractCegarLoop]: Abstraction has 125 states and 125 transitions. [2021-11-07 07:57:39,263 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 2.0161290322580645) internal successors, (125), 62 states have internal predecessors, (125), 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 07:57:39,263 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 125 transitions. [2021-11-07 07:57:39,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2021-11-07 07:57:39,264 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:57:39,264 INFO L513 BasicCegarLoop]: trace histogram [59, 59, 1, 1, 1, 1, 1, 1] [2021-11-07 07:57:39,305 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-11-07 07:57:39,489 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2021-11-07 07:57:39,490 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:57:39,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:57:39,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1673424093, now seen corresponding path program 59 times [2021-11-07 07:57:39,490 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:57:39,490 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132694504] [2021-11-07 07:57:39,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:57:39,490 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:57:39,509 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:57:40,882 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:40,883 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:57:40,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132694504] [2021-11-07 07:57:40,883 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2132694504] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:40,883 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451046775] [2021-11-07 07:57:40,884 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:57:40,884 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:57:40,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:57:40,885 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:57:40,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-11-07 07:57:42,059 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 60 check-sat command(s) [2021-11-07 07:57:42,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:57:42,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 212 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-07 07:57:42,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:57:42,367 INFO L134 CoverageAnalysis]: Checked inductivity of 3481 backedges. 0 proven. 3481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:42,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [451046775] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:42,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:57:42,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 63 [2021-11-07 07:57:42,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036343076] [2021-11-07 07:57:42,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-11-07 07:57:42,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:57:42,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-11-07 07:57:42,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2021-11-07 07:57:42,368 INFO L87 Difference]: Start difference. First operand 125 states and 125 transitions. Second operand has 63 states, 63 states have (on average 2.015873015873016) internal successors, (127), 63 states have internal predecessors, (127), 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 07:57:42,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:57:42,482 INFO L93 Difference]: Finished difference Result 132 states and 132 transitions. [2021-11-07 07:57:42,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-11-07 07:57:42,483 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 2.015873015873016) internal successors, (127), 63 states have internal predecessors, (127), 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 124 [2021-11-07 07:57:42,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:57:42,484 INFO L225 Difference]: With dead ends: 132 [2021-11-07 07:57:42,484 INFO L226 Difference]: Without dead ends: 128 [2021-11-07 07:57:42,484 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 185 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2021-11-07 07:57:42,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-11-07 07:57:42,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 127. [2021-11-07 07:57:42,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 126 states have (on average 1.007936507936508) internal successors, (127), 126 states have internal predecessors, (127), 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 07:57:42,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 127 transitions. [2021-11-07 07:57:42,487 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 127 transitions. Word has length 124 [2021-11-07 07:57:42,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:57:42,488 INFO L470 AbstractCegarLoop]: Abstraction has 127 states and 127 transitions. [2021-11-07 07:57:42,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 2.015873015873016) internal successors, (127), 63 states have internal predecessors, (127), 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 07:57:42,488 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 127 transitions. [2021-11-07 07:57:42,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 127 [2021-11-07 07:57:42,489 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:57:42,489 INFO L513 BasicCegarLoop]: trace histogram [60, 60, 1, 1, 1, 1, 1, 1] [2021-11-07 07:57:42,514 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2021-11-07 07:57:42,697 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:57:42,698 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:57:42,698 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:57:42,698 INFO L85 PathProgramCache]: Analyzing trace with hash -1789552347, now seen corresponding path program 60 times [2021-11-07 07:57:42,698 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:57:42,698 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104171044] [2021-11-07 07:57:42,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:57:42,698 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:57:42,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:57:44,050 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:44,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:57:44,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104171044] [2021-11-07 07:57:44,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104171044] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:44,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10560134] [2021-11-07 07:57:44,051 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:57:44,051 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:57:44,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:57:44,052 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:57:44,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-11-07 07:57:45,283 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 61 check-sat command(s) [2021-11-07 07:57:45,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:57:45,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-07 07:57:45,286 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:57:45,631 INFO L134 CoverageAnalysis]: Checked inductivity of 3600 backedges. 0 proven. 3600 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:45,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [10560134] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:45,632 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:57:45,632 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 64 [2021-11-07 07:57:45,632 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [638215721] [2021-11-07 07:57:45,632 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-11-07 07:57:45,632 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:57:45,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-11-07 07:57:45,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2021-11-07 07:57:45,634 INFO L87 Difference]: Start difference. First operand 127 states and 127 transitions. Second operand has 64 states, 64 states have (on average 2.015625) internal successors, (129), 64 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 07:57:45,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:57:45,766 INFO L93 Difference]: Finished difference Result 134 states and 134 transitions. [2021-11-07 07:57:45,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-11-07 07:57:45,767 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.015625) internal successors, (129), 64 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 126 [2021-11-07 07:57:45,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:57:45,768 INFO L225 Difference]: With dead ends: 134 [2021-11-07 07:57:45,768 INFO L226 Difference]: Without dead ends: 130 [2021-11-07 07:57:45,768 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 126 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2021-11-07 07:57:45,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2021-11-07 07:57:45,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 129. [2021-11-07 07:57:45,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 128 states have (on average 1.0078125) internal successors, (129), 128 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 07:57:45,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 129 transitions. [2021-11-07 07:57:45,772 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 129 transitions. Word has length 126 [2021-11-07 07:57:45,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:57:45,773 INFO L470 AbstractCegarLoop]: Abstraction has 129 states and 129 transitions. [2021-11-07 07:57:45,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.015625) internal successors, (129), 64 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 07:57:45,773 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 129 transitions. [2021-11-07 07:57:45,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 129 [2021-11-07 07:57:45,774 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:57:45,774 INFO L513 BasicCegarLoop]: trace histogram [61, 61, 1, 1, 1, 1, 1, 1] [2021-11-07 07:57:45,813 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Forceful destruction successful, exit code 0 [2021-11-07 07:57:46,001 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:57:46,002 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:57:46,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:57:46,002 INFO L85 PathProgramCache]: Analyzing trace with hash -1719654745, now seen corresponding path program 61 times [2021-11-07 07:57:46,002 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:57:46,002 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778051376] [2021-11-07 07:57:46,002 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:57:46,002 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:57:46,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:57:47,416 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:47,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:57:47,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778051376] [2021-11-07 07:57:47,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778051376] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:47,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303134325] [2021-11-07 07:57:47,417 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:57:47,417 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:57:47,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:57:47,418 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:57:47,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-11-07 07:57:48,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:57:48,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 63 conjunts are in the unsatisfiable core [2021-11-07 07:57:48,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:57:49,050 INFO L134 CoverageAnalysis]: Checked inductivity of 3721 backedges. 0 proven. 3721 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:49,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [303134325] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:49,051 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:57:49,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 65 [2021-11-07 07:57:49,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [51669703] [2021-11-07 07:57:49,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-11-07 07:57:49,052 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:57:49,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-11-07 07:57:49,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2021-11-07 07:57:49,053 INFO L87 Difference]: Start difference. First operand 129 states and 129 transitions. Second operand has 65 states, 65 states have (on average 2.0153846153846153) internal successors, (131), 65 states have internal predecessors, (131), 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 07:57:49,209 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:57:49,210 INFO L93 Difference]: Finished difference Result 136 states and 136 transitions. [2021-11-07 07:57:49,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-11-07 07:57:49,210 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.0153846153846153) internal successors, (131), 65 states have internal predecessors, (131), 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 128 [2021-11-07 07:57:49,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:57:49,211 INFO L225 Difference]: With dead ends: 136 [2021-11-07 07:57:49,212 INFO L226 Difference]: Without dead ends: 132 [2021-11-07 07:57:49,215 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2021-11-07 07:57:49,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-11-07 07:57:49,218 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 131. [2021-11-07 07:57:49,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 131 states, 130 states have (on average 1.0076923076923077) internal successors, (131), 130 states have internal predecessors, (131), 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 07:57:49,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 131 transitions. [2021-11-07 07:57:49,219 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 131 transitions. Word has length 128 [2021-11-07 07:57:49,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:57:49,219 INFO L470 AbstractCegarLoop]: Abstraction has 131 states and 131 transitions. [2021-11-07 07:57:49,221 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.0153846153846153) internal successors, (131), 65 states have internal predecessors, (131), 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 07:57:49,221 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 131 transitions. [2021-11-07 07:57:49,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2021-11-07 07:57:49,222 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:57:49,222 INFO L513 BasicCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1] [2021-11-07 07:57:49,262 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-11-07 07:57:49,449 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2021-11-07 07:57:49,450 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:57:49,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:57:49,450 INFO L85 PathProgramCache]: Analyzing trace with hash 1027431337, now seen corresponding path program 62 times [2021-11-07 07:57:49,450 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:57:49,450 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1874192332] [2021-11-07 07:57:49,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:57:49,450 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:57:49,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:57:50,855 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:50,855 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:57:50,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1874192332] [2021-11-07 07:57:50,855 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1874192332] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:50,855 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1857404151] [2021-11-07 07:57:50,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:57:50,856 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:57:50,856 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:57:50,857 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:57:50,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-11-07 07:57:52,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:57:52,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:57:52,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 64 conjunts are in the unsatisfiable core [2021-11-07 07:57:52,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:57:52,439 INFO L134 CoverageAnalysis]: Checked inductivity of 3844 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:52,439 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1857404151] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:52,439 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:57:52,439 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 66 [2021-11-07 07:57:52,439 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1243800463] [2021-11-07 07:57:52,440 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-11-07 07:57:52,440 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:57:52,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-11-07 07:57:52,441 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2021-11-07 07:57:52,441 INFO L87 Difference]: Start difference. First operand 131 states and 131 transitions. Second operand has 66 states, 66 states have (on average 2.015151515151515) internal successors, (133), 66 states have internal predecessors, (133), 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 07:57:52,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:57:52,557 INFO L93 Difference]: Finished difference Result 138 states and 138 transitions. [2021-11-07 07:57:52,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-11-07 07:57:52,558 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 2.015151515151515) internal successors, (133), 66 states have internal predecessors, (133), 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 130 [2021-11-07 07:57:52,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:57:52,559 INFO L225 Difference]: With dead ends: 138 [2021-11-07 07:57:52,559 INFO L226 Difference]: Without dead ends: 134 [2021-11-07 07:57:52,559 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 130 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2021-11-07 07:57:52,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-11-07 07:57:52,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 133. [2021-11-07 07:57:52,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 133 states, 132 states have (on average 1.0075757575757576) internal successors, (133), 132 states have internal predecessors, (133), 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 07:57:52,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 133 transitions. [2021-11-07 07:57:52,562 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 133 transitions. Word has length 130 [2021-11-07 07:57:52,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:57:52,562 INFO L470 AbstractCegarLoop]: Abstraction has 133 states and 133 transitions. [2021-11-07 07:57:52,562 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 2.015151515151515) internal successors, (133), 66 states have internal predecessors, (133), 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 07:57:52,562 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 133 transitions. [2021-11-07 07:57:52,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2021-11-07 07:57:52,562 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:57:52,563 INFO L513 BasicCegarLoop]: trace histogram [63, 63, 1, 1, 1, 1, 1, 1] [2021-11-07 07:57:52,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-11-07 07:57:52,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:57:52,766 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:57:52,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:57:52,766 INFO L85 PathProgramCache]: Analyzing trace with hash -427730901, now seen corresponding path program 63 times [2021-11-07 07:57:52,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:57:52,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284940538] [2021-11-07 07:57:52,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:57:52,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:57:52,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:57:54,228 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:54,228 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:57:54,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284940538] [2021-11-07 07:57:54,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284940538] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:54,228 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185633083] [2021-11-07 07:57:54,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:57:54,228 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:57:54,229 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:57:54,230 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:57:54,231 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-11-07 07:57:55,595 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 64 check-sat command(s) [2021-11-07 07:57:55,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:57:55,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 65 conjunts are in the unsatisfiable core [2021-11-07 07:57:55,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:57:55,905 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:55,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1185633083] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:55,905 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:57:55,905 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 67 [2021-11-07 07:57:55,905 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259252414] [2021-11-07 07:57:55,905 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-11-07 07:57:55,906 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:57:55,906 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-11-07 07:57:55,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2021-11-07 07:57:55,907 INFO L87 Difference]: Start difference. First operand 133 states and 133 transitions. Second operand has 67 states, 67 states have (on average 2.014925373134328) internal successors, (135), 67 states have internal predecessors, (135), 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 07:57:56,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:57:56,027 INFO L93 Difference]: Finished difference Result 140 states and 140 transitions. [2021-11-07 07:57:56,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-11-07 07:57:56,027 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.014925373134328) internal successors, (135), 67 states have internal predecessors, (135), 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 132 [2021-11-07 07:57:56,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:57:56,028 INFO L225 Difference]: With dead ends: 140 [2021-11-07 07:57:56,028 INFO L226 Difference]: Without dead ends: 136 [2021-11-07 07:57:56,028 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2021-11-07 07:57:56,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-11-07 07:57:56,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 135. [2021-11-07 07:57:56,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 135 states, 134 states have (on average 1.007462686567164) internal successors, (135), 134 states have internal predecessors, (135), 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 07:57:56,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 135 transitions. [2021-11-07 07:57:56,032 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 135 transitions. Word has length 132 [2021-11-07 07:57:56,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:57:56,032 INFO L470 AbstractCegarLoop]: Abstraction has 135 states and 135 transitions. [2021-11-07 07:57:56,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.014925373134328) internal successors, (135), 67 states have internal predecessors, (135), 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 07:57:56,033 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 135 transitions. [2021-11-07 07:57:56,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 135 [2021-11-07 07:57:56,033 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:57:56,034 INFO L513 BasicCegarLoop]: trace histogram [64, 64, 1, 1, 1, 1, 1, 1] [2021-11-07 07:57:56,058 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2021-11-07 07:57:56,241 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:57:56,242 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:57:56,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:57:56,242 INFO L85 PathProgramCache]: Analyzing trace with hash 1320696877, now seen corresponding path program 64 times [2021-11-07 07:57:56,242 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:57:56,242 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424981011] [2021-11-07 07:57:56,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:57:56,243 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:57:56,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:57:57,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:57,713 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:57:57,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424981011] [2021-11-07 07:57:57,713 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424981011] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:57,713 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592050782] [2021-11-07 07:57:57,713 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:57:57,713 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:57:57,714 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:57:57,714 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:57:57,715 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-11-07 07:57:59,088 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:57:59,088 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:57:59,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-07 07:57:59,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:57:59,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4096 backedges. 0 proven. 4096 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:57:59,411 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592050782] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:57:59,411 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:57:59,411 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 68 [2021-11-07 07:57:59,412 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1480937935] [2021-11-07 07:57:59,412 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-11-07 07:57:59,412 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:57:59,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-11-07 07:57:59,413 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2021-11-07 07:57:59,413 INFO L87 Difference]: Start difference. First operand 135 states and 135 transitions. Second operand has 68 states, 68 states have (on average 2.014705882352941) internal successors, (137), 68 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 07:57:59,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:57:59,532 INFO L93 Difference]: Finished difference Result 142 states and 142 transitions. [2021-11-07 07:57:59,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-11-07 07:57:59,533 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.014705882352941) internal successors, (137), 68 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 134 [2021-11-07 07:57:59,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:57:59,534 INFO L225 Difference]: With dead ends: 142 [2021-11-07 07:57:59,534 INFO L226 Difference]: Without dead ends: 138 [2021-11-07 07:57:59,534 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 134 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2021-11-07 07:57:59,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2021-11-07 07:57:59,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 137. [2021-11-07 07:57:59,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 136 states have (on average 1.0073529411764706) internal successors, (137), 136 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 07:57:59,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 137 transitions. [2021-11-07 07:57:59,538 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 137 transitions. Word has length 134 [2021-11-07 07:57:59,539 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:57:59,539 INFO L470 AbstractCegarLoop]: Abstraction has 137 states and 137 transitions. [2021-11-07 07:57:59,539 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.014705882352941) internal successors, (137), 68 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 07:57:59,539 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 137 transitions. [2021-11-07 07:57:59,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2021-11-07 07:57:59,540 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:57:59,540 INFO L513 BasicCegarLoop]: trace histogram [65, 65, 1, 1, 1, 1, 1, 1] [2021-11-07 07:57:59,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Forceful destruction successful, exit code 0 [2021-11-07 07:57:59,741 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-11-07 07:57:59,742 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:57:59,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:57:59,742 INFO L85 PathProgramCache]: Analyzing trace with hash -2067388497, now seen corresponding path program 65 times [2021-11-07 07:57:59,742 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:57:59,743 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548387723] [2021-11-07 07:57:59,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:57:59,743 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:57:59,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:58:01,244 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:58:01,244 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:58:01,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548387723] [2021-11-07 07:58:01,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1548387723] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:58:01,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178576404] [2021-11-07 07:58:01,244 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:58:01,245 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:58:01,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:58:01,245 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:58:01,246 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-11-07 07:58:02,673 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 66 check-sat command(s) [2021-11-07 07:58:02,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:58:02,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 67 conjunts are in the unsatisfiable core [2021-11-07 07:58:02,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:58:03,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4225 backedges. 0 proven. 4225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:58:03,016 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178576404] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:58:03,016 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:58:03,016 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 69 [2021-11-07 07:58:03,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364939445] [2021-11-07 07:58:03,017 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-11-07 07:58:03,017 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:58:03,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-11-07 07:58:03,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2021-11-07 07:58:03,018 INFO L87 Difference]: Start difference. First operand 137 states and 137 transitions. Second operand has 69 states, 69 states have (on average 2.0144927536231885) internal successors, (139), 69 states have internal predecessors, (139), 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 07:58:03,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:58:03,162 INFO L93 Difference]: Finished difference Result 144 states and 144 transitions. [2021-11-07 07:58:03,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-11-07 07:58:03,163 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 2.0144927536231885) internal successors, (139), 69 states have internal predecessors, (139), 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 136 [2021-11-07 07:58:03,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:58:03,164 INFO L225 Difference]: With dead ends: 144 [2021-11-07 07:58:03,164 INFO L226 Difference]: Without dead ends: 140 [2021-11-07 07:58:03,164 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 203 GetRequests, 136 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2021-11-07 07:58:03,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2021-11-07 07:58:03,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 139. [2021-11-07 07:58:03,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 138 states have (on average 1.0072463768115942) internal successors, (139), 138 states have internal predecessors, (139), 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 07:58:03,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 139 transitions. [2021-11-07 07:58:03,168 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 139 transitions. Word has length 136 [2021-11-07 07:58:03,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:58:03,169 INFO L470 AbstractCegarLoop]: Abstraction has 139 states and 139 transitions. [2021-11-07 07:58:03,169 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 2.0144927536231885) internal successors, (139), 69 states have internal predecessors, (139), 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 07:58:03,169 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 139 transitions. [2021-11-07 07:58:03,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2021-11-07 07:58:03,170 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:58:03,170 INFO L513 BasicCegarLoop]: trace histogram [66, 66, 1, 1, 1, 1, 1, 1] [2021-11-07 07:58:03,208 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-11-07 07:58:03,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:58:03,386 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:58:03,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:58:03,386 INFO L85 PathProgramCache]: Analyzing trace with hash 1862744753, now seen corresponding path program 66 times [2021-11-07 07:58:03,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:58:03,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415650446] [2021-11-07 07:58:03,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:58:03,387 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:58:03,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:58:04,963 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:58:04,963 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:58:04,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415650446] [2021-11-07 07:58:04,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415650446] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:58:04,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240710516] [2021-11-07 07:58:04,964 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:58:04,964 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:58:04,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:58:04,970 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:58:04,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-11-07 07:58:06,463 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 67 check-sat command(s) [2021-11-07 07:58:06,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:58:06,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 68 conjunts are in the unsatisfiable core [2021-11-07 07:58:06,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:58:06,791 INFO L134 CoverageAnalysis]: Checked inductivity of 4356 backedges. 0 proven. 4356 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:58:06,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1240710516] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:58:06,791 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:58:06,792 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 70 [2021-11-07 07:58:06,792 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839383272] [2021-11-07 07:58:06,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-11-07 07:58:06,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:58:06,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-11-07 07:58:06,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2021-11-07 07:58:06,799 INFO L87 Difference]: Start difference. First operand 139 states and 139 transitions. Second operand has 70 states, 70 states have (on average 2.0142857142857142) internal successors, (141), 70 states have internal predecessors, (141), 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 07:58:06,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:58:06,989 INFO L93 Difference]: Finished difference Result 146 states and 146 transitions. [2021-11-07 07:58:06,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-11-07 07:58:06,989 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.0142857142857142) internal successors, (141), 70 states have internal predecessors, (141), 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 138 [2021-11-07 07:58:06,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:58:06,991 INFO L225 Difference]: With dead ends: 146 [2021-11-07 07:58:06,991 INFO L226 Difference]: Without dead ends: 142 [2021-11-07 07:58:06,991 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2021-11-07 07:58:06,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-11-07 07:58:06,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 141. [2021-11-07 07:58:06,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 141 states, 140 states have (on average 1.0071428571428571) internal successors, (141), 140 states have internal predecessors, (141), 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 07:58:06,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 141 transitions. [2021-11-07 07:58:06,995 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 141 transitions. Word has length 138 [2021-11-07 07:58:06,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:58:06,996 INFO L470 AbstractCegarLoop]: Abstraction has 141 states and 141 transitions. [2021-11-07 07:58:06,996 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.0142857142857142) internal successors, (141), 70 states have internal predecessors, (141), 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 07:58:06,996 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 141 transitions. [2021-11-07 07:58:06,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2021-11-07 07:58:06,997 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:58:06,997 INFO L513 BasicCegarLoop]: trace histogram [67, 67, 1, 1, 1, 1, 1, 1] [2021-11-07 07:58:07,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-11-07 07:58:07,216 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:58:07,217 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:58:07,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:58:07,217 INFO L85 PathProgramCache]: Analyzing trace with hash -850422477, now seen corresponding path program 67 times [2021-11-07 07:58:07,217 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:58:07,217 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037748216] [2021-11-07 07:58:07,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:58:07,218 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:58:07,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:58:08,917 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:58:08,917 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:58:08,917 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037748216] [2021-11-07 07:58:08,917 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037748216] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:58:08,918 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082338553] [2021-11-07 07:58:08,918 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:58:08,918 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:58:08,918 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:58:08,921 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:58:08,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-11-07 07:58:10,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:58:10,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 69 conjunts are in the unsatisfiable core [2021-11-07 07:58:10,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:58:10,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4489 backedges. 0 proven. 4489 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:58:10,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082338553] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:58:10,799 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:58:10,799 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 71 [2021-11-07 07:58:10,799 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743979668] [2021-11-07 07:58:10,800 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-11-07 07:58:10,800 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:58:10,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-11-07 07:58:10,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2021-11-07 07:58:10,800 INFO L87 Difference]: Start difference. First operand 141 states and 141 transitions. Second operand has 71 states, 71 states have (on average 2.0140845070422535) internal successors, (143), 71 states have internal predecessors, (143), 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 07:58:10,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:58:10,931 INFO L93 Difference]: Finished difference Result 148 states and 148 transitions. [2021-11-07 07:58:10,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-11-07 07:58:10,932 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 2.0140845070422535) internal successors, (143), 71 states have internal predecessors, (143), 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 140 [2021-11-07 07:58:10,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:58:10,932 INFO L225 Difference]: With dead ends: 148 [2021-11-07 07:58:10,933 INFO L226 Difference]: Without dead ends: 144 [2021-11-07 07:58:10,933 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 209 GetRequests, 140 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2021-11-07 07:58:10,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2021-11-07 07:58:10,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 143. [2021-11-07 07:58:10,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 142 states have (on average 1.0070422535211268) internal successors, (143), 142 states have internal predecessors, (143), 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 07:58:10,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 143 transitions. [2021-11-07 07:58:10,936 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 143 transitions. Word has length 140 [2021-11-07 07:58:10,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:58:10,937 INFO L470 AbstractCegarLoop]: Abstraction has 143 states and 143 transitions. [2021-11-07 07:58:10,937 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 2.0140845070422535) internal successors, (143), 71 states have internal predecessors, (143), 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 07:58:10,937 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 143 transitions. [2021-11-07 07:58:10,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 143 [2021-11-07 07:58:10,938 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:58:10,938 INFO L513 BasicCegarLoop]: trace histogram [68, 68, 1, 1, 1, 1, 1, 1] [2021-11-07 07:58:10,962 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Ended with exit code 0 [2021-11-07 07:58:11,145 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-11-07 07:58:11,146 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:58:11,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:58:11,146 INFO L85 PathProgramCache]: Analyzing trace with hash -1158981835, now seen corresponding path program 68 times [2021-11-07 07:58:11,146 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:58:11,146 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269991236] [2021-11-07 07:58:11,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:58:11,146 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:58:11,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:58:12,798 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:58:12,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:58:12,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269991236] [2021-11-07 07:58:12,799 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269991236] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:58:12,799 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047583185] [2021-11-07 07:58:12,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:58:12,799 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:58:12,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:58:12,800 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:58:12,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-11-07 07:58:14,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:58:14,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:58:14,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 239 conjuncts, 70 conjunts are in the unsatisfiable core [2021-11-07 07:58:14,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:58:14,637 INFO L134 CoverageAnalysis]: Checked inductivity of 4624 backedges. 0 proven. 4624 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:58:14,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047583185] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:58:14,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:58:14,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 72 [2021-11-07 07:58:14,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [173946853] [2021-11-07 07:58:14,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-11-07 07:58:14,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:58:14,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-11-07 07:58:14,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2021-11-07 07:58:14,638 INFO L87 Difference]: Start difference. First operand 143 states and 143 transitions. Second operand has 72 states, 72 states have (on average 2.013888888888889) internal successors, (145), 72 states have internal predecessors, (145), 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 07:58:14,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:58:14,768 INFO L93 Difference]: Finished difference Result 150 states and 150 transitions. [2021-11-07 07:58:14,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-11-07 07:58:14,768 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.013888888888889) internal successors, (145), 72 states have internal predecessors, (145), 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 142 [2021-11-07 07:58:14,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:58:14,769 INFO L225 Difference]: With dead ends: 150 [2021-11-07 07:58:14,769 INFO L226 Difference]: Without dead ends: 146 [2021-11-07 07:58:14,770 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 212 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2021-11-07 07:58:14,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2021-11-07 07:58:14,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 145. [2021-11-07 07:58:14,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 145 states, 144 states have (on average 1.0069444444444444) internal successors, (145), 144 states have internal predecessors, (145), 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 07:58:14,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 145 transitions. [2021-11-07 07:58:14,774 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 145 transitions. Word has length 142 [2021-11-07 07:58:14,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:58:14,774 INFO L470 AbstractCegarLoop]: Abstraction has 145 states and 145 transitions. [2021-11-07 07:58:14,774 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.013888888888889) internal successors, (145), 72 states have internal predecessors, (145), 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 07:58:14,775 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 145 transitions. [2021-11-07 07:58:14,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-11-07 07:58:14,775 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:58:14,776 INFO L513 BasicCegarLoop]: trace histogram [69, 69, 1, 1, 1, 1, 1, 1] [2021-11-07 07:58:14,811 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-11-07 07:58:14,989 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-11-07 07:58:14,990 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:58:14,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:58:14,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1331781449, now seen corresponding path program 69 times [2021-11-07 07:58:14,990 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:58:14,990 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164859330] [2021-11-07 07:58:14,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:58:14,990 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:58:15,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:58:16,688 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:58:16,688 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:58:16,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164859330] [2021-11-07 07:58:16,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1164859330] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:58:16,689 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1549016264] [2021-11-07 07:58:16,689 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:58:16,689 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:58:16,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:58:16,690 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:58:16,691 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-11-07 07:58:18,290 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 70 check-sat command(s) [2021-11-07 07:58:18,290 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:58:18,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 242 conjuncts, 71 conjunts are in the unsatisfiable core [2021-11-07 07:58:18,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:58:18,637 INFO L134 CoverageAnalysis]: Checked inductivity of 4761 backedges. 0 proven. 4761 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:58:18,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1549016264] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:58:18,637 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:58:18,638 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 73 [2021-11-07 07:58:18,638 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666900230] [2021-11-07 07:58:18,638 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-11-07 07:58:18,638 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:58:18,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-11-07 07:58:18,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2021-11-07 07:58:18,639 INFO L87 Difference]: Start difference. First operand 145 states and 145 transitions. Second operand has 73 states, 73 states have (on average 2.0136986301369864) internal successors, (147), 73 states have internal predecessors, (147), 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 07:58:18,771 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:58:18,771 INFO L93 Difference]: Finished difference Result 152 states and 152 transitions. [2021-11-07 07:58:18,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-11-07 07:58:18,771 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.0136986301369864) internal successors, (147), 73 states have internal predecessors, (147), 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 144 [2021-11-07 07:58:18,772 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:58:18,772 INFO L225 Difference]: With dead ends: 152 [2021-11-07 07:58:18,772 INFO L226 Difference]: Without dead ends: 148 [2021-11-07 07:58:18,773 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 144 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2021-11-07 07:58:18,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2021-11-07 07:58:18,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 147. [2021-11-07 07:58:18,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 146 states have (on average 1.0068493150684932) internal successors, (147), 146 states have internal predecessors, (147), 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 07:58:18,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 147 transitions. [2021-11-07 07:58:18,777 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 147 transitions. Word has length 144 [2021-11-07 07:58:18,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:58:18,777 INFO L470 AbstractCegarLoop]: Abstraction has 147 states and 147 transitions. [2021-11-07 07:58:18,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.0136986301369864) internal successors, (147), 73 states have internal predecessors, (147), 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 07:58:18,777 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 147 transitions. [2021-11-07 07:58:18,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 147 [2021-11-07 07:58:18,778 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:58:18,778 INFO L513 BasicCegarLoop]: trace histogram [70, 70, 1, 1, 1, 1, 1, 1] [2021-11-07 07:58:18,817 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-11-07 07:58:18,994 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-11-07 07:58:18,994 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:58:18,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:58:18,994 INFO L85 PathProgramCache]: Analyzing trace with hash 111514041, now seen corresponding path program 70 times [2021-11-07 07:58:18,994 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:58:18,994 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [499026079] [2021-11-07 07:58:18,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:58:18,994 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:58:19,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:58:20,743 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:58:20,744 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:58:20,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [499026079] [2021-11-07 07:58:20,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [499026079] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:58:20,744 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645520666] [2021-11-07 07:58:20,744 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:58:20,744 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:58:20,744 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:58:20,745 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:58:20,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-11-07 07:58:22,352 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:58:22,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:58:22,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 72 conjunts are in the unsatisfiable core [2021-11-07 07:58:22,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:58:22,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4900 backedges. 0 proven. 4900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:58:22,783 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645520666] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:58:22,783 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:58:22,783 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 74 [2021-11-07 07:58:22,783 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043096390] [2021-11-07 07:58:22,784 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-11-07 07:58:22,784 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:58:22,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-11-07 07:58:22,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2021-11-07 07:58:22,785 INFO L87 Difference]: Start difference. First operand 147 states and 147 transitions. Second operand has 74 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 74 states have internal predecessors, (149), 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 07:58:22,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:58:22,930 INFO L93 Difference]: Finished difference Result 154 states and 154 transitions. [2021-11-07 07:58:22,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-11-07 07:58:22,930 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 74 states have internal predecessors, (149), 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 146 [2021-11-07 07:58:22,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:58:22,931 INFO L225 Difference]: With dead ends: 154 [2021-11-07 07:58:22,931 INFO L226 Difference]: Without dead ends: 150 [2021-11-07 07:58:22,931 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 146 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2021-11-07 07:58:22,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2021-11-07 07:58:22,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 149. [2021-11-07 07:58:22,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 149 states, 148 states have (on average 1.0067567567567568) internal successors, (149), 148 states have internal predecessors, (149), 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 07:58:22,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 149 transitions. [2021-11-07 07:58:22,935 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 149 transitions. Word has length 146 [2021-11-07 07:58:22,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:58:22,936 INFO L470 AbstractCegarLoop]: Abstraction has 149 states and 149 transitions. [2021-11-07 07:58:22,936 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 2.0135135135135136) internal successors, (149), 74 states have internal predecessors, (149), 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 07:58:22,936 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 149 transitions. [2021-11-07 07:58:22,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 149 [2021-11-07 07:58:22,937 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:58:22,937 INFO L513 BasicCegarLoop]: trace histogram [71, 71, 1, 1, 1, 1, 1, 1] [2021-11-07 07:58:22,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-11-07 07:58:23,162 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:58:23,162 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:58:23,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:58:23,162 INFO L85 PathProgramCache]: Analyzing trace with hash -155956677, now seen corresponding path program 71 times [2021-11-07 07:58:23,162 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:58:23,162 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682716209] [2021-11-07 07:58:23,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:58:23,163 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:58:23,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:58:24,987 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:58:24,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:58:24,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682716209] [2021-11-07 07:58:24,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682716209] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:58:24,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1203639301] [2021-11-07 07:58:24,987 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:58:24,987 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:58:24,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:58:24,988 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:58:24,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-11-07 07:58:26,661 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 72 check-sat command(s) [2021-11-07 07:58:26,661 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:58:26,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 248 conjuncts, 73 conjunts are in the unsatisfiable core [2021-11-07 07:58:26,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:58:27,025 INFO L134 CoverageAnalysis]: Checked inductivity of 5041 backedges. 0 proven. 5041 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:58:27,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1203639301] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:58:27,025 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:58:27,025 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 75 [2021-11-07 07:58:27,026 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068097719] [2021-11-07 07:58:27,026 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-11-07 07:58:27,026 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:58:27,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-11-07 07:58:27,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2021-11-07 07:58:27,028 INFO L87 Difference]: Start difference. First operand 149 states and 149 transitions. Second operand has 75 states, 75 states have (on average 2.013333333333333) internal successors, (151), 75 states have internal predecessors, (151), 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 07:58:27,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:58:27,242 INFO L93 Difference]: Finished difference Result 156 states and 156 transitions. [2021-11-07 07:58:27,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-11-07 07:58:27,242 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.013333333333333) internal successors, (151), 75 states have internal predecessors, (151), 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 148 [2021-11-07 07:58:27,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:58:27,244 INFO L225 Difference]: With dead ends: 156 [2021-11-07 07:58:27,244 INFO L226 Difference]: Without dead ends: 152 [2021-11-07 07:58:27,244 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2021-11-07 07:58:27,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2021-11-07 07:58:27,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 151. [2021-11-07 07:58:27,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 151 states, 150 states have (on average 1.0066666666666666) internal successors, (151), 150 states have internal predecessors, (151), 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 07:58:27,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 151 transitions. [2021-11-07 07:58:27,249 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 151 transitions. Word has length 148 [2021-11-07 07:58:27,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:58:27,249 INFO L470 AbstractCegarLoop]: Abstraction has 151 states and 151 transitions. [2021-11-07 07:58:27,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.013333333333333) internal successors, (151), 75 states have internal predecessors, (151), 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 07:58:27,250 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 151 transitions. [2021-11-07 07:58:27,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 151 [2021-11-07 07:58:27,251 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:58:27,251 INFO L513 BasicCegarLoop]: trace histogram [72, 72, 1, 1, 1, 1, 1, 1] [2021-11-07 07:58:27,294 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-11-07 07:58:27,465 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:58:27,466 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:58:27,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:58:27,466 INFO L85 PathProgramCache]: Analyzing trace with hash 502721085, now seen corresponding path program 72 times [2021-11-07 07:58:27,466 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:58:27,466 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517566975] [2021-11-07 07:58:27,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:58:27,466 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:58:27,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:58:29,290 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:58:29,290 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:58:29,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517566975] [2021-11-07 07:58:29,290 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517566975] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:58:29,290 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [379796991] [2021-11-07 07:58:29,290 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:58:29,290 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:58:29,290 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:58:29,291 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:58:29,292 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-11-07 07:58:31,051 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 73 check-sat command(s) [2021-11-07 07:58:31,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:58:31,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 74 conjunts are in the unsatisfiable core [2021-11-07 07:58:31,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:58:31,428 INFO L134 CoverageAnalysis]: Checked inductivity of 5184 backedges. 0 proven. 5184 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:58:31,428 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [379796991] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:58:31,428 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:58:31,428 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 76 [2021-11-07 07:58:31,429 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732298611] [2021-11-07 07:58:31,429 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-11-07 07:58:31,429 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:58:31,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-11-07 07:58:31,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2021-11-07 07:58:31,430 INFO L87 Difference]: Start difference. First operand 151 states and 151 transitions. Second operand has 76 states, 76 states have (on average 2.013157894736842) internal successors, (153), 76 states have internal predecessors, (153), 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 07:58:31,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:58:31,584 INFO L93 Difference]: Finished difference Result 158 states and 158 transitions. [2021-11-07 07:58:31,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-11-07 07:58:31,585 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.013157894736842) internal successors, (153), 76 states have internal predecessors, (153), 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 150 [2021-11-07 07:58:31,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:58:31,586 INFO L225 Difference]: With dead ends: 158 [2021-11-07 07:58:31,586 INFO L226 Difference]: Without dead ends: 154 [2021-11-07 07:58:31,586 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 150 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2021-11-07 07:58:31,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-11-07 07:58:31,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 153. [2021-11-07 07:58:31,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 152 states have (on average 1.006578947368421) internal successors, (153), 152 states have internal predecessors, (153), 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 07:58:31,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 153 transitions. [2021-11-07 07:58:31,589 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 153 transitions. Word has length 150 [2021-11-07 07:58:31,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:58:31,590 INFO L470 AbstractCegarLoop]: Abstraction has 153 states and 153 transitions. [2021-11-07 07:58:31,590 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.013157894736842) internal successors, (153), 76 states have internal predecessors, (153), 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 07:58:31,590 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 153 transitions. [2021-11-07 07:58:31,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2021-11-07 07:58:31,590 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:58:31,590 INFO L513 BasicCegarLoop]: trace histogram [73, 73, 1, 1, 1, 1, 1, 1] [2021-11-07 07:58:31,615 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-11-07 07:58:31,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:58:31,791 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:58:31,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:58:31,791 INFO L85 PathProgramCache]: Analyzing trace with hash 2131857855, now seen corresponding path program 73 times [2021-11-07 07:58:31,791 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:58:31,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626252425] [2021-11-07 07:58:31,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:58:31,792 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:58:31,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:58:33,685 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:58:33,685 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:58:33,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626252425] [2021-11-07 07:58:33,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626252425] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:58:33,685 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2029724421] [2021-11-07 07:58:33,686 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:58:33,686 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:58:33,686 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:58:33,686 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:58:33,687 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-11-07 07:58:35,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:58:35,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 254 conjuncts, 75 conjunts are in the unsatisfiable core [2021-11-07 07:58:35,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:58:35,803 INFO L134 CoverageAnalysis]: Checked inductivity of 5329 backedges. 0 proven. 5329 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:58:35,803 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2029724421] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:58:35,803 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:58:35,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 77 [2021-11-07 07:58:35,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81287696] [2021-11-07 07:58:35,804 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-11-07 07:58:35,804 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:58:35,805 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-11-07 07:58:35,805 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2021-11-07 07:58:35,805 INFO L87 Difference]: Start difference. First operand 153 states and 153 transitions. Second operand has 77 states, 77 states have (on average 2.012987012987013) internal successors, (155), 77 states have internal predecessors, (155), 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 07:58:35,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:58:35,949 INFO L93 Difference]: Finished difference Result 160 states and 160 transitions. [2021-11-07 07:58:35,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-11-07 07:58:35,949 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.012987012987013) internal successors, (155), 77 states have internal predecessors, (155), 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 152 [2021-11-07 07:58:35,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:58:35,950 INFO L225 Difference]: With dead ends: 160 [2021-11-07 07:58:35,950 INFO L226 Difference]: Without dead ends: 156 [2021-11-07 07:58:35,950 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 227 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2021-11-07 07:58:35,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-11-07 07:58:35,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 155. [2021-11-07 07:58:35,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 154 states have (on average 1.0064935064935066) internal successors, (155), 154 states have internal predecessors, (155), 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 07:58:35,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 155 transitions. [2021-11-07 07:58:35,954 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 155 transitions. Word has length 152 [2021-11-07 07:58:35,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:58:35,955 INFO L470 AbstractCegarLoop]: Abstraction has 155 states and 155 transitions. [2021-11-07 07:58:35,955 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.012987012987013) internal successors, (155), 77 states have internal predecessors, (155), 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 07:58:35,955 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 155 transitions. [2021-11-07 07:58:35,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2021-11-07 07:58:35,956 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:58:35,956 INFO L513 BasicCegarLoop]: trace histogram [74, 74, 1, 1, 1, 1, 1, 1] [2021-11-07 07:58:36,001 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-11-07 07:58:36,181 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:58:36,182 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:58:36,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:58:36,182 INFO L85 PathProgramCache]: Analyzing trace with hash 69230785, now seen corresponding path program 74 times [2021-11-07 07:58:36,182 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:58:36,182 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2112777022] [2021-11-07 07:58:36,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:58:36,182 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:58:36,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:58:38,129 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 0 proven. 5476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:58:38,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:58:38,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2112777022] [2021-11-07 07:58:38,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2112777022] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:58:38,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831671743] [2021-11-07 07:58:38,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:58:38,130 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:58:38,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:58:38,131 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:58:38,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-11-07 07:58:39,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:58:39,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:58:39,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 257 conjuncts, 76 conjunts are in the unsatisfiable core [2021-11-07 07:58:39,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:58:40,305 INFO L134 CoverageAnalysis]: Checked inductivity of 5476 backedges. 0 proven. 5476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:58:40,305 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831671743] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:58:40,305 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:58:40,305 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 78 [2021-11-07 07:58:40,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608405379] [2021-11-07 07:58:40,306 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-11-07 07:58:40,306 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:58:40,306 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-11-07 07:58:40,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2021-11-07 07:58:40,307 INFO L87 Difference]: Start difference. First operand 155 states and 155 transitions. Second operand has 78 states, 78 states have (on average 2.0128205128205128) internal successors, (157), 78 states have internal predecessors, (157), 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 07:58:40,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:58:40,453 INFO L93 Difference]: Finished difference Result 162 states and 162 transitions. [2021-11-07 07:58:40,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-11-07 07:58:40,453 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.0128205128205128) internal successors, (157), 78 states have internal predecessors, (157), 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 154 [2021-11-07 07:58:40,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:58:40,454 INFO L225 Difference]: With dead ends: 162 [2021-11-07 07:58:40,454 INFO L226 Difference]: Without dead ends: 158 [2021-11-07 07:58:40,454 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2021-11-07 07:58:40,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-11-07 07:58:40,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 157. [2021-11-07 07:58:40,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 157 states, 156 states have (on average 1.0064102564102564) internal successors, (157), 156 states have internal predecessors, (157), 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 07:58:40,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 157 transitions. [2021-11-07 07:58:40,457 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 157 transitions. Word has length 154 [2021-11-07 07:58:40,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:58:40,457 INFO L470 AbstractCegarLoop]: Abstraction has 157 states and 157 transitions. [2021-11-07 07:58:40,457 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.0128205128205128) internal successors, (157), 78 states have internal predecessors, (157), 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 07:58:40,457 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 157 transitions. [2021-11-07 07:58:40,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 157 [2021-11-07 07:58:40,458 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:58:40,458 INFO L513 BasicCegarLoop]: trace histogram [75, 75, 1, 1, 1, 1, 1, 1] [2021-11-07 07:58:40,483 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Ended with exit code 0 [2021-11-07 07:58:40,658 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2021-11-07 07:58:40,658 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:58:40,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:58:40,659 INFO L85 PathProgramCache]: Analyzing trace with hash -2135460029, now seen corresponding path program 75 times [2021-11-07 07:58:40,659 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:58:40,659 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [489391908] [2021-11-07 07:58:40,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:58:40,659 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:58:40,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:58:42,665 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:58:42,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:58:42,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [489391908] [2021-11-07 07:58:42,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [489391908] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:58:42,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947071216] [2021-11-07 07:58:42,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:58:42,666 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:58:42,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:58:42,666 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:58:42,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-11-07 07:58:44,534 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 76 check-sat command(s) [2021-11-07 07:58:44,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:58:44,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 77 conjunts are in the unsatisfiable core [2021-11-07 07:58:44,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:58:44,969 INFO L134 CoverageAnalysis]: Checked inductivity of 5625 backedges. 0 proven. 5625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:58:44,969 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [947071216] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:58:44,969 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:58:44,969 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 79 [2021-11-07 07:58:44,969 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289940662] [2021-11-07 07:58:44,970 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-11-07 07:58:44,970 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:58:44,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-11-07 07:58:44,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2021-11-07 07:58:44,971 INFO L87 Difference]: Start difference. First operand 157 states and 157 transitions. Second operand has 79 states, 79 states have (on average 2.0126582278481013) internal successors, (159), 79 states have internal predecessors, (159), 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 07:58:45,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:58:45,113 INFO L93 Difference]: Finished difference Result 164 states and 164 transitions. [2021-11-07 07:58:45,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-11-07 07:58:45,113 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.0126582278481013) internal successors, (159), 79 states have internal predecessors, (159), 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 156 [2021-11-07 07:58:45,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:58:45,114 INFO L225 Difference]: With dead ends: 164 [2021-11-07 07:58:45,114 INFO L226 Difference]: Without dead ends: 160 [2021-11-07 07:58:45,115 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 233 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2021-11-07 07:58:45,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-07 07:58:45,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 159. [2021-11-07 07:58:45,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 159 states, 158 states have (on average 1.0063291139240507) internal successors, (159), 158 states have internal predecessors, (159), 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 07:58:45,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 159 transitions. [2021-11-07 07:58:45,119 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 159 transitions. Word has length 156 [2021-11-07 07:58:45,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:58:45,119 INFO L470 AbstractCegarLoop]: Abstraction has 159 states and 159 transitions. [2021-11-07 07:58:45,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.0126582278481013) internal successors, (159), 79 states have internal predecessors, (159), 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 07:58:45,120 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 159 transitions. [2021-11-07 07:58:45,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 159 [2021-11-07 07:58:45,120 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:58:45,121 INFO L513 BasicCegarLoop]: trace histogram [76, 76, 1, 1, 1, 1, 1, 1] [2021-11-07 07:58:45,158 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-11-07 07:58:45,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:58:45,334 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:58:45,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:58:45,334 INFO L85 PathProgramCache]: Analyzing trace with hash 870511941, now seen corresponding path program 76 times [2021-11-07 07:58:45,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:58:45,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [266677804] [2021-11-07 07:58:45,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:58:45,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:58:45,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:58:47,466 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:58:47,467 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:58:47,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [266677804] [2021-11-07 07:58:47,467 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [266677804] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:58:47,467 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325536118] [2021-11-07 07:58:47,467 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:58:47,467 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:58:47,467 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:58:47,468 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:58:47,469 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-11-07 07:58:49,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:58:49,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:58:49,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 263 conjuncts, 78 conjunts are in the unsatisfiable core [2021-11-07 07:58:49,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:58:49,733 INFO L134 CoverageAnalysis]: Checked inductivity of 5776 backedges. 0 proven. 5776 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:58:49,733 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325536118] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:58:49,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:58:49,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 80 [2021-11-07 07:58:49,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [880784262] [2021-11-07 07:58:49,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-11-07 07:58:49,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:58:49,734 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-11-07 07:58:49,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2021-11-07 07:58:49,735 INFO L87 Difference]: Start difference. First operand 159 states and 159 transitions. Second operand has 80 states, 80 states have (on average 2.0125) internal successors, (161), 80 states have internal predecessors, (161), 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 07:58:49,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:58:49,879 INFO L93 Difference]: Finished difference Result 166 states and 166 transitions. [2021-11-07 07:58:49,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-11-07 07:58:49,879 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.0125) internal successors, (161), 80 states have internal predecessors, (161), 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 158 [2021-11-07 07:58:49,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:58:49,880 INFO L225 Difference]: With dead ends: 166 [2021-11-07 07:58:49,880 INFO L226 Difference]: Without dead ends: 162 [2021-11-07 07:58:49,880 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 158 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2021-11-07 07:58:49,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-11-07 07:58:49,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 161. [2021-11-07 07:58:49,884 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 161 states, 160 states have (on average 1.00625) internal successors, (161), 160 states have internal predecessors, (161), 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 07:58:49,884 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 161 transitions. [2021-11-07 07:58:49,884 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 161 transitions. Word has length 158 [2021-11-07 07:58:49,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:58:49,885 INFO L470 AbstractCegarLoop]: Abstraction has 161 states and 161 transitions. [2021-11-07 07:58:49,885 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.0125) internal successors, (161), 80 states have internal predecessors, (161), 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 07:58:49,885 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 161 transitions. [2021-11-07 07:58:49,886 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 161 [2021-11-07 07:58:49,886 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:58:49,886 INFO L513 BasicCegarLoop]: trace histogram [77, 77, 1, 1, 1, 1, 1, 1] [2021-11-07 07:58:49,923 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2021-11-07 07:58:50,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-11-07 07:58:50,104 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:58:50,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:58:50,105 INFO L85 PathProgramCache]: Analyzing trace with hash -903415097, now seen corresponding path program 77 times [2021-11-07 07:58:50,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:58:50,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314426725] [2021-11-07 07:58:50,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:58:50,105 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:58:50,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:58:52,217 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:58:52,217 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:58:52,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314426725] [2021-11-07 07:58:52,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314426725] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:58:52,217 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [823358661] [2021-11-07 07:58:52,217 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:58:52,218 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:58:52,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:58:52,219 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:58:52,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-11-07 07:58:54,168 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 78 check-sat command(s) [2021-11-07 07:58:54,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:58:54,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 79 conjunts are in the unsatisfiable core [2021-11-07 07:58:54,172 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:58:54,578 INFO L134 CoverageAnalysis]: Checked inductivity of 5929 backedges. 0 proven. 5929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:58:54,578 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [823358661] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:58:54,579 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:58:54,579 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 81 [2021-11-07 07:58:54,579 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720183510] [2021-11-07 07:58:54,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-11-07 07:58:54,580 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:58:54,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-11-07 07:58:54,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2021-11-07 07:58:54,581 INFO L87 Difference]: Start difference. First operand 161 states and 161 transitions. Second operand has 81 states, 81 states have (on average 2.0123456790123457) internal successors, (163), 81 states have internal predecessors, (163), 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 07:58:54,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:58:54,732 INFO L93 Difference]: Finished difference Result 168 states and 168 transitions. [2021-11-07 07:58:54,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-11-07 07:58:54,733 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 2.0123456790123457) internal successors, (163), 81 states have internal predecessors, (163), 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 160 [2021-11-07 07:58:54,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:58:54,734 INFO L225 Difference]: With dead ends: 168 [2021-11-07 07:58:54,734 INFO L226 Difference]: Without dead ends: 164 [2021-11-07 07:58:54,734 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 239 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2021-11-07 07:58:54,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-11-07 07:58:54,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 163. [2021-11-07 07:58:54,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 163 states, 162 states have (on average 1.0061728395061729) internal successors, (163), 162 states have internal predecessors, (163), 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 07:58:54,737 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 163 transitions. [2021-11-07 07:58:54,737 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 163 transitions. Word has length 160 [2021-11-07 07:58:54,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:58:54,738 INFO L470 AbstractCegarLoop]: Abstraction has 163 states and 163 transitions. [2021-11-07 07:58:54,738 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 2.0123456790123457) internal successors, (163), 81 states have internal predecessors, (163), 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 07:58:54,738 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 163 transitions. [2021-11-07 07:58:54,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 163 [2021-11-07 07:58:54,739 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:58:54,739 INFO L513 BasicCegarLoop]: trace histogram [78, 78, 1, 1, 1, 1, 1, 1] [2021-11-07 07:58:54,780 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-11-07 07:58:54,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-11-07 07:58:54,954 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:58:54,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:58:54,954 INFO L85 PathProgramCache]: Analyzing trace with hash -545282103, now seen corresponding path program 78 times [2021-11-07 07:58:54,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:58:54,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2085888651] [2021-11-07 07:58:54,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:58:54,954 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:58:54,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:58:57,186 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:58:57,186 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:58:57,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2085888651] [2021-11-07 07:58:57,186 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2085888651] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:58:57,186 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760977218] [2021-11-07 07:58:57,186 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:58:57,186 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:58:57,186 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:58:57,187 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:58:57,188 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-11-07 07:58:59,225 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 79 check-sat command(s) [2021-11-07 07:58:59,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:58:59,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 80 conjunts are in the unsatisfiable core [2021-11-07 07:58:59,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:58:59,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6084 backedges. 0 proven. 6084 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:58:59,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760977218] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:58:59,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:58:59,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 82 [2021-11-07 07:58:59,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1136633850] [2021-11-07 07:58:59,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-11-07 07:58:59,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:58:59,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-11-07 07:58:59,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2021-11-07 07:58:59,737 INFO L87 Difference]: Start difference. First operand 163 states and 163 transitions. Second operand has 82 states, 82 states have (on average 2.0121951219512195) internal successors, (165), 82 states have internal predecessors, (165), 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 07:58:59,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:58:59,925 INFO L93 Difference]: Finished difference Result 170 states and 170 transitions. [2021-11-07 07:58:59,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-11-07 07:58:59,926 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.0121951219512195) internal successors, (165), 82 states have internal predecessors, (165), 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 162 [2021-11-07 07:58:59,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:58:59,927 INFO L225 Difference]: With dead ends: 170 [2021-11-07 07:58:59,927 INFO L226 Difference]: Without dead ends: 166 [2021-11-07 07:58:59,928 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2021-11-07 07:58:59,928 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-11-07 07:58:59,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 165. [2021-11-07 07:58:59,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 164 states have (on average 1.0060975609756098) internal successors, (165), 164 states have internal predecessors, (165), 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 07:58:59,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 165 transitions. [2021-11-07 07:58:59,932 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 165 transitions. Word has length 162 [2021-11-07 07:58:59,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:58:59,933 INFO L470 AbstractCegarLoop]: Abstraction has 165 states and 165 transitions. [2021-11-07 07:58:59,933 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.0121951219512195) internal successors, (165), 82 states have internal predecessors, (165), 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 07:58:59,933 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 165 transitions. [2021-11-07 07:58:59,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 165 [2021-11-07 07:58:59,934 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:58:59,934 INFO L513 BasicCegarLoop]: trace histogram [79, 79, 1, 1, 1, 1, 1, 1] [2021-11-07 07:58:59,978 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-11-07 07:59:00,149 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:59:00,150 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:59:00,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:59:00,150 INFO L85 PathProgramCache]: Analyzing trace with hash 23141451, now seen corresponding path program 79 times [2021-11-07 07:59:00,150 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:59:00,150 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274410903] [2021-11-07 07:59:00,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:59:00,150 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:59:00,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:59:02,381 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:59:02,381 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:59:02,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274410903] [2021-11-07 07:59:02,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274410903] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:59:02,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915303738] [2021-11-07 07:59:02,381 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:59:02,381 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:59:02,382 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:59:02,382 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:59:02,383 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-11-07 07:59:04,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:59:04,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 272 conjuncts, 81 conjunts are in the unsatisfiable core [2021-11-07 07:59:04,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:59:04,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6241 backedges. 0 proven. 6241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:59:04,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [915303738] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:59:04,818 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:59:04,818 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 83 [2021-11-07 07:59:04,818 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993989593] [2021-11-07 07:59:04,818 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-11-07 07:59:04,819 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:59:04,819 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-11-07 07:59:04,819 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2021-11-07 07:59:04,820 INFO L87 Difference]: Start difference. First operand 165 states and 165 transitions. Second operand has 83 states, 83 states have (on average 2.0120481927710845) internal successors, (167), 83 states have internal predecessors, (167), 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 07:59:04,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:59:04,986 INFO L93 Difference]: Finished difference Result 172 states and 172 transitions. [2021-11-07 07:59:04,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-11-07 07:59:04,986 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 2.0120481927710845) internal successors, (167), 83 states have internal predecessors, (167), 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 164 [2021-11-07 07:59:04,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:59:04,987 INFO L225 Difference]: With dead ends: 172 [2021-11-07 07:59:04,987 INFO L226 Difference]: Without dead ends: 168 [2021-11-07 07:59:04,987 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 164 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2021-11-07 07:59:04,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-11-07 07:59:04,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 167. [2021-11-07 07:59:04,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 167 states, 166 states have (on average 1.0060240963855422) internal successors, (167), 166 states have internal predecessors, (167), 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 07:59:04,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 167 transitions. [2021-11-07 07:59:04,990 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 167 transitions. Word has length 164 [2021-11-07 07:59:04,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:59:04,990 INFO L470 AbstractCegarLoop]: Abstraction has 167 states and 167 transitions. [2021-11-07 07:59:04,990 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 2.0120481927710845) internal successors, (167), 83 states have internal predecessors, (167), 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 07:59:04,990 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 167 transitions. [2021-11-07 07:59:04,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2021-11-07 07:59:04,991 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:59:04,991 INFO L513 BasicCegarLoop]: trace histogram [80, 80, 1, 1, 1, 1, 1, 1] [2021-11-07 07:59:05,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-11-07 07:59:05,193 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2021-11-07 07:59:05,194 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:59:05,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:59:05,194 INFO L85 PathProgramCache]: Analyzing trace with hash 817330253, now seen corresponding path program 80 times [2021-11-07 07:59:05,194 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:59:05,194 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758354311] [2021-11-07 07:59:05,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:59:05,194 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:59:05,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:59:07,537 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 0 proven. 6400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:59:07,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:59:07,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758354311] [2021-11-07 07:59:07,538 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [758354311] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:59:07,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [538850503] [2021-11-07 07:59:07,538 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:59:07,538 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:59:07,538 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:59:07,539 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:59:07,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-11-07 07:59:09,624 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:59:09,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:59:09,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 82 conjunts are in the unsatisfiable core [2021-11-07 07:59:09,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:59:10,110 INFO L134 CoverageAnalysis]: Checked inductivity of 6400 backedges. 0 proven. 6400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:59:10,110 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [538850503] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:59:10,111 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:59:10,111 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 84 [2021-11-07 07:59:10,111 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2012369905] [2021-11-07 07:59:10,111 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-11-07 07:59:10,112 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:59:10,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-11-07 07:59:10,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2021-11-07 07:59:10,114 INFO L87 Difference]: Start difference. First operand 167 states and 167 transitions. Second operand has 84 states, 84 states have (on average 2.011904761904762) internal successors, (169), 84 states have internal predecessors, (169), 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 07:59:10,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:59:10,278 INFO L93 Difference]: Finished difference Result 174 states and 174 transitions. [2021-11-07 07:59:10,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-11-07 07:59:10,279 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.011904761904762) internal successors, (169), 84 states have internal predecessors, (169), 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 166 [2021-11-07 07:59:10,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:59:10,280 INFO L225 Difference]: With dead ends: 174 [2021-11-07 07:59:10,280 INFO L226 Difference]: Without dead ends: 170 [2021-11-07 07:59:10,280 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 248 GetRequests, 166 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2021-11-07 07:59:10,280 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2021-11-07 07:59:10,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 169. [2021-11-07 07:59:10,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 169 states, 168 states have (on average 1.005952380952381) internal successors, (169), 168 states have internal predecessors, (169), 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 07:59:10,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 169 transitions. [2021-11-07 07:59:10,286 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 169 transitions. Word has length 166 [2021-11-07 07:59:10,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:59:10,286 INFO L470 AbstractCegarLoop]: Abstraction has 169 states and 169 transitions. [2021-11-07 07:59:10,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.011904761904762) internal successors, (169), 84 states have internal predecessors, (169), 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 07:59:10,287 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 169 transitions. [2021-11-07 07:59:10,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2021-11-07 07:59:10,288 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:59:10,288 INFO L513 BasicCegarLoop]: trace histogram [81, 81, 1, 1, 1, 1, 1, 1] [2021-11-07 07:59:10,331 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-11-07 07:59:10,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable80 [2021-11-07 07:59:10,506 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:59:10,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:59:10,506 INFO L85 PathProgramCache]: Analyzing trace with hash -471409713, now seen corresponding path program 81 times [2021-11-07 07:59:10,506 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:59:10,506 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301457651] [2021-11-07 07:59:10,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:59:10,506 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:59:10,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:59:13,195 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:59:13,196 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:59:13,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301457651] [2021-11-07 07:59:13,196 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301457651] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:59:13,196 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746892457] [2021-11-07 07:59:13,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:59:13,196 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:59:13,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:59:13,197 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:59:13,204 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-11-07 07:59:15,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 82 check-sat command(s) [2021-11-07 07:59:15,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:59:15,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 278 conjuncts, 83 conjunts are in the unsatisfiable core [2021-11-07 07:59:15,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:59:15,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6561 backedges. 0 proven. 6561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:59:15,918 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1746892457] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:59:15,918 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:59:15,918 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 85 [2021-11-07 07:59:15,918 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517591597] [2021-11-07 07:59:15,918 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-11-07 07:59:15,919 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:59:15,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-11-07 07:59:15,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2021-11-07 07:59:15,920 INFO L87 Difference]: Start difference. First operand 169 states and 169 transitions. Second operand has 85 states, 85 states have (on average 2.011764705882353) internal successors, (171), 85 states have internal predecessors, (171), 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 07:59:16,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:59:16,091 INFO L93 Difference]: Finished difference Result 176 states and 176 transitions. [2021-11-07 07:59:16,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-11-07 07:59:16,092 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.011764705882353) internal successors, (171), 85 states have internal predecessors, (171), 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 168 [2021-11-07 07:59:16,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:59:16,092 INFO L225 Difference]: With dead ends: 176 [2021-11-07 07:59:16,092 INFO L226 Difference]: Without dead ends: 172 [2021-11-07 07:59:16,093 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 251 GetRequests, 168 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 160 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2021-11-07 07:59:16,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-11-07 07:59:16,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 171. [2021-11-07 07:59:16,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 171 states, 170 states have (on average 1.0058823529411764) internal successors, (171), 170 states have internal predecessors, (171), 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 07:59:16,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 171 transitions. [2021-11-07 07:59:16,097 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 171 transitions. Word has length 168 [2021-11-07 07:59:16,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:59:16,097 INFO L470 AbstractCegarLoop]: Abstraction has 171 states and 171 transitions. [2021-11-07 07:59:16,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.011764705882353) internal successors, (171), 85 states have internal predecessors, (171), 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 07:59:16,097 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 171 transitions. [2021-11-07 07:59:16,098 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 171 [2021-11-07 07:59:16,098 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:59:16,099 INFO L513 BasicCegarLoop]: trace histogram [82, 82, 1, 1, 1, 1, 1, 1] [2021-11-07 07:59:16,137 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2021-11-07 07:59:16,321 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:59:16,321 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:59:16,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:59:16,321 INFO L85 PathProgramCache]: Analyzing trace with hash -1999935791, now seen corresponding path program 82 times [2021-11-07 07:59:16,321 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:59:16,321 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1921723572] [2021-11-07 07:59:16,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:59:16,322 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:59:16,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:59:18,705 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:59:18,705 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:59:18,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1921723572] [2021-11-07 07:59:18,706 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1921723572] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:59:18,706 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1537762378] [2021-11-07 07:59:18,706 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:59:18,706 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:59:18,706 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:59:18,707 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:59:18,722 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-11-07 07:59:20,931 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:59:20,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:59:20,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 84 conjunts are in the unsatisfiable core [2021-11-07 07:59:20,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:59:21,366 INFO L134 CoverageAnalysis]: Checked inductivity of 6724 backedges. 0 proven. 6724 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:59:21,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1537762378] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:59:21,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:59:21,367 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 86 [2021-11-07 07:59:21,367 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870894762] [2021-11-07 07:59:21,367 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-11-07 07:59:21,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:59:21,368 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-11-07 07:59:21,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2021-11-07 07:59:21,369 INFO L87 Difference]: Start difference. First operand 171 states and 171 transitions. Second operand has 86 states, 86 states have (on average 2.011627906976744) internal successors, (173), 86 states have internal predecessors, (173), 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 07:59:21,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:59:21,586 INFO L93 Difference]: Finished difference Result 178 states and 178 transitions. [2021-11-07 07:59:21,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-11-07 07:59:21,586 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 2.011627906976744) internal successors, (173), 86 states have internal predecessors, (173), 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 170 [2021-11-07 07:59:21,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:59:21,587 INFO L225 Difference]: With dead ends: 178 [2021-11-07 07:59:21,587 INFO L226 Difference]: Without dead ends: 174 [2021-11-07 07:59:21,587 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 254 GetRequests, 170 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2021-11-07 07:59:21,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2021-11-07 07:59:21,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 173. [2021-11-07 07:59:21,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 173 states, 172 states have (on average 1.005813953488372) internal successors, (173), 172 states have internal predecessors, (173), 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 07:59:21,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 173 states to 173 states and 173 transitions. [2021-11-07 07:59:21,592 INFO L78 Accepts]: Start accepts. Automaton has 173 states and 173 transitions. Word has length 170 [2021-11-07 07:59:21,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:59:21,593 INFO L470 AbstractCegarLoop]: Abstraction has 173 states and 173 transitions. [2021-11-07 07:59:21,593 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 2.011627906976744) internal successors, (173), 86 states have internal predecessors, (173), 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 07:59:21,593 INFO L276 IsEmpty]: Start isEmpty. Operand 173 states and 173 transitions. [2021-11-07 07:59:21,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 173 [2021-11-07 07:59:21,594 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:59:21,594 INFO L513 BasicCegarLoop]: trace histogram [83, 83, 1, 1, 1, 1, 1, 1] [2021-11-07 07:59:21,634 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-11-07 07:59:21,809 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:59:21,810 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:59:21,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:59:21,810 INFO L85 PathProgramCache]: Analyzing trace with hash -2034681517, now seen corresponding path program 83 times [2021-11-07 07:59:21,810 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:59:21,810 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1928814974] [2021-11-07 07:59:21,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:59:21,811 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:59:21,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:59:24,341 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:59:24,341 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:59:24,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1928814974] [2021-11-07 07:59:24,341 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1928814974] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:59:24,341 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [830234507] [2021-11-07 07:59:24,341 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 07:59:24,341 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:59:24,342 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:59:24,342 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:59:24,343 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-11-07 07:59:26,688 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 84 check-sat command(s) [2021-11-07 07:59:26,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:59:26,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 284 conjuncts, 85 conjunts are in the unsatisfiable core [2021-11-07 07:59:26,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:59:27,113 INFO L134 CoverageAnalysis]: Checked inductivity of 6889 backedges. 0 proven. 6889 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:59:27,113 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [830234507] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:59:27,113 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:59:27,113 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 87 [2021-11-07 07:59:27,114 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617778424] [2021-11-07 07:59:27,114 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-11-07 07:59:27,114 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:59:27,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-11-07 07:59:27,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2021-11-07 07:59:27,115 INFO L87 Difference]: Start difference. First operand 173 states and 173 transitions. Second operand has 87 states, 87 states have (on average 2.0114942528735633) internal successors, (175), 87 states have internal predecessors, (175), 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 07:59:27,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:59:27,291 INFO L93 Difference]: Finished difference Result 180 states and 180 transitions. [2021-11-07 07:59:27,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-11-07 07:59:27,292 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 2.0114942528735633) internal successors, (175), 87 states have internal predecessors, (175), 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 172 [2021-11-07 07:59:27,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:59:27,292 INFO L225 Difference]: With dead ends: 180 [2021-11-07 07:59:27,292 INFO L226 Difference]: Without dead ends: 176 [2021-11-07 07:59:27,293 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 257 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2021-11-07 07:59:27,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-11-07 07:59:27,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 175. [2021-11-07 07:59:27,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 175 states, 174 states have (on average 1.0057471264367817) internal successors, (175), 174 states have internal predecessors, (175), 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 07:59:27,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 175 states to 175 states and 175 transitions. [2021-11-07 07:59:27,296 INFO L78 Accepts]: Start accepts. Automaton has 175 states and 175 transitions. Word has length 172 [2021-11-07 07:59:27,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:59:27,297 INFO L470 AbstractCegarLoop]: Abstraction has 175 states and 175 transitions. [2021-11-07 07:59:27,297 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 2.0114942528735633) internal successors, (175), 87 states have internal predecessors, (175), 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 07:59:27,297 INFO L276 IsEmpty]: Start isEmpty. Operand 175 states and 175 transitions. [2021-11-07 07:59:27,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 175 [2021-11-07 07:59:27,298 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:59:27,298 INFO L513 BasicCegarLoop]: trace histogram [84, 84, 1, 1, 1, 1, 1, 1] [2021-11-07 07:59:27,342 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-11-07 07:59:27,521 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable83 [2021-11-07 07:59:27,522 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:59:27,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:59:27,522 INFO L85 PathProgramCache]: Analyzing trace with hash -1065585835, now seen corresponding path program 84 times [2021-11-07 07:59:27,522 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:59:27,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [886619786] [2021-11-07 07:59:27,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:59:27,523 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:59:27,551 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:59:30,077 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:59:30,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:59:30,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [886619786] [2021-11-07 07:59:30,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [886619786] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:59:30,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077540499] [2021-11-07 07:59:30,078 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 07:59:30,078 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:59:30,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:59:30,080 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:59:30,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-11-07 07:59:32,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 85 check-sat command(s) [2021-11-07 07:59:32,459 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:59:32,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 287 conjuncts, 86 conjunts are in the unsatisfiable core [2021-11-07 07:59:32,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:59:32,923 INFO L134 CoverageAnalysis]: Checked inductivity of 7056 backedges. 0 proven. 7056 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:59:32,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077540499] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:59:32,923 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:59:32,923 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 88 [2021-11-07 07:59:32,923 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494139276] [2021-11-07 07:59:32,924 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2021-11-07 07:59:32,924 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:59:32,924 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-11-07 07:59:32,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2021-11-07 07:59:32,925 INFO L87 Difference]: Start difference. First operand 175 states and 175 transitions. Second operand has 88 states, 88 states have (on average 2.0113636363636362) internal successors, (177), 88 states have internal predecessors, (177), 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 07:59:33,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:59:33,103 INFO L93 Difference]: Finished difference Result 182 states and 182 transitions. [2021-11-07 07:59:33,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-11-07 07:59:33,104 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.0113636363636362) internal successors, (177), 88 states have internal predecessors, (177), 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 174 [2021-11-07 07:59:33,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:59:33,104 INFO L225 Difference]: With dead ends: 182 [2021-11-07 07:59:33,104 INFO L226 Difference]: Without dead ends: 178 [2021-11-07 07:59:33,105 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 260 GetRequests, 174 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2021-11-07 07:59:33,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2021-11-07 07:59:33,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 177. [2021-11-07 07:59:33,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 177 states, 176 states have (on average 1.0056818181818181) internal successors, (177), 176 states have internal predecessors, (177), 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 07:59:33,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 177 states to 177 states and 177 transitions. [2021-11-07 07:59:33,108 INFO L78 Accepts]: Start accepts. Automaton has 177 states and 177 transitions. Word has length 174 [2021-11-07 07:59:33,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:59:33,109 INFO L470 AbstractCegarLoop]: Abstraction has 177 states and 177 transitions. [2021-11-07 07:59:33,109 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.0113636363636362) internal successors, (177), 88 states have internal predecessors, (177), 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 07:59:33,109 INFO L276 IsEmpty]: Start isEmpty. Operand 177 states and 177 transitions. [2021-11-07 07:59:33,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 177 [2021-11-07 07:59:33,110 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:59:33,110 INFO L513 BasicCegarLoop]: trace histogram [85, 85, 1, 1, 1, 1, 1, 1] [2021-11-07 07:59:33,138 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-11-07 07:59:33,310 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:59:33,311 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:59:33,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:59:33,311 INFO L85 PathProgramCache]: Analyzing trace with hash -1772538665, now seen corresponding path program 85 times [2021-11-07 07:59:33,311 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:59:33,311 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663123092] [2021-11-07 07:59:33,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:59:33,312 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:59:33,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:59:35,964 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:59:35,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:59:35,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663123092] [2021-11-07 07:59:35,965 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663123092] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:59:35,965 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346750267] [2021-11-07 07:59:35,965 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 07:59:35,965 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:59:35,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:59:35,967 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:59:35,969 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-11-07 07:59:38,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:59:38,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 87 conjunts are in the unsatisfiable core [2021-11-07 07:59:38,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:59:38,820 INFO L134 CoverageAnalysis]: Checked inductivity of 7225 backedges. 0 proven. 7225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:59:38,820 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346750267] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:59:38,821 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:59:38,821 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 89 [2021-11-07 07:59:38,821 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931201083] [2021-11-07 07:59:38,821 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2021-11-07 07:59:38,821 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:59:38,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-11-07 07:59:38,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2021-11-07 07:59:38,823 INFO L87 Difference]: Start difference. First operand 177 states and 177 transitions. Second operand has 89 states, 89 states have (on average 2.0112359550561796) internal successors, (179), 89 states have internal predecessors, (179), 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 07:59:39,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:59:39,014 INFO L93 Difference]: Finished difference Result 184 states and 184 transitions. [2021-11-07 07:59:39,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-11-07 07:59:39,015 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 2.0112359550561796) internal successors, (179), 89 states have internal predecessors, (179), 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 176 [2021-11-07 07:59:39,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:59:39,016 INFO L225 Difference]: With dead ends: 184 [2021-11-07 07:59:39,016 INFO L226 Difference]: Without dead ends: 180 [2021-11-07 07:59:39,017 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 176 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2021-11-07 07:59:39,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2021-11-07 07:59:39,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 179. [2021-11-07 07:59:39,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.0056179775280898) internal successors, (179), 178 states have internal predecessors, (179), 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 07:59:39,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 179 transitions. [2021-11-07 07:59:39,020 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 179 transitions. Word has length 176 [2021-11-07 07:59:39,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:59:39,020 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 179 transitions. [2021-11-07 07:59:39,020 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 2.0112359550561796) internal successors, (179), 89 states have internal predecessors, (179), 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 07:59:39,021 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 179 transitions. [2021-11-07 07:59:39,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 179 [2021-11-07 07:59:39,021 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:59:39,022 INFO L513 BasicCegarLoop]: trace histogram [86, 86, 1, 1, 1, 1, 1, 1] [2021-11-07 07:59:39,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-11-07 07:59:39,222 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:59:39,222 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:59:39,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:59:39,222 INFO L85 PathProgramCache]: Analyzing trace with hash 1745591769, now seen corresponding path program 86 times [2021-11-07 07:59:39,223 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:59:39,223 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809299343] [2021-11-07 07:59:39,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:59:39,223 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:59:39,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:59:41,896 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 0 proven. 7396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:59:41,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:59:41,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809299343] [2021-11-07 07:59:41,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809299343] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:59:41,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1620535456] [2021-11-07 07:59:41,896 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 07:59:41,897 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:59:41,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:59:41,897 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:59:41,898 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-11-07 07:59:44,342 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 07:59:44,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:59:44,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 293 conjuncts, 88 conjunts are in the unsatisfiable core [2021-11-07 07:59:44,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:59:44,791 INFO L134 CoverageAnalysis]: Checked inductivity of 7396 backedges. 0 proven. 7396 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:59:44,791 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1620535456] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:59:44,791 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:59:44,791 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 90 [2021-11-07 07:59:44,791 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684787290] [2021-11-07 07:59:44,792 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2021-11-07 07:59:44,792 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:59:44,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-11-07 07:59:44,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2021-11-07 07:59:44,793 INFO L87 Difference]: Start difference. First operand 179 states and 179 transitions. Second operand has 90 states, 90 states have (on average 2.011111111111111) internal successors, (181), 90 states have internal predecessors, (181), 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 07:59:44,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:59:44,988 INFO L93 Difference]: Finished difference Result 186 states and 186 transitions. [2021-11-07 07:59:44,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-11-07 07:59:44,989 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 2.011111111111111) internal successors, (181), 90 states have internal predecessors, (181), 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 178 [2021-11-07 07:59:44,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:59:44,990 INFO L225 Difference]: With dead ends: 186 [2021-11-07 07:59:44,990 INFO L226 Difference]: Without dead ends: 182 [2021-11-07 07:59:44,990 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 178 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2021-11-07 07:59:44,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2021-11-07 07:59:44,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 181. [2021-11-07 07:59:44,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.0055555555555555) internal successors, (181), 180 states have internal predecessors, (181), 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 07:59:44,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 181 transitions. [2021-11-07 07:59:44,993 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 181 transitions. Word has length 178 [2021-11-07 07:59:44,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:59:44,993 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 181 transitions. [2021-11-07 07:59:44,993 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 2.011111111111111) internal successors, (181), 90 states have internal predecessors, (181), 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 07:59:44,994 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 181 transitions. [2021-11-07 07:59:44,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2021-11-07 07:59:44,994 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:59:44,994 INFO L513 BasicCegarLoop]: trace histogram [87, 87, 1, 1, 1, 1, 1, 1] [2021-11-07 07:59:45,023 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-11-07 07:59:45,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-11-07 07:59:45,198 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:59:45,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:59:45,198 INFO L85 PathProgramCache]: Analyzing trace with hash -1765290405, now seen corresponding path program 87 times [2021-11-07 07:59:45,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:59:45,198 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1889895179] [2021-11-07 07:59:45,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:59:45,198 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:59:45,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:59:47,888 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:59:47,888 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:59:47,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1889895179] [2021-11-07 07:59:47,888 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1889895179] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:59:47,888 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802259554] [2021-11-07 07:59:47,888 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 07:59:47,888 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:59:47,888 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:59:47,889 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:59:47,890 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-11-07 07:59:50,459 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 88 check-sat command(s) [2021-11-07 07:59:50,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:59:50,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 296 conjuncts, 89 conjunts are in the unsatisfiable core [2021-11-07 07:59:50,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:59:50,942 INFO L134 CoverageAnalysis]: Checked inductivity of 7569 backedges. 0 proven. 7569 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:59:50,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [802259554] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:59:50,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:59:50,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 91 [2021-11-07 07:59:50,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [879895811] [2021-11-07 07:59:50,944 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2021-11-07 07:59:50,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:59:50,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-11-07 07:59:50,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2021-11-07 07:59:50,945 INFO L87 Difference]: Start difference. First operand 181 states and 181 transitions. Second operand has 91 states, 91 states have (on average 2.010989010989011) internal successors, (183), 91 states have internal predecessors, (183), 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 07:59:51,155 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:59:51,155 INFO L93 Difference]: Finished difference Result 188 states and 188 transitions. [2021-11-07 07:59:51,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-11-07 07:59:51,156 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.010989010989011) internal successors, (183), 91 states have internal predecessors, (183), 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 180 [2021-11-07 07:59:51,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:59:51,157 INFO L225 Difference]: With dead ends: 188 [2021-11-07 07:59:51,157 INFO L226 Difference]: Without dead ends: 184 [2021-11-07 07:59:51,158 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 269 GetRequests, 180 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2021-11-07 07:59:51,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-11-07 07:59:51,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 183. [2021-11-07 07:59:51,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 183 states, 182 states have (on average 1.0054945054945055) internal successors, (183), 182 states have internal predecessors, (183), 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 07:59:51,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 183 states to 183 states and 183 transitions. [2021-11-07 07:59:51,164 INFO L78 Accepts]: Start accepts. Automaton has 183 states and 183 transitions. Word has length 180 [2021-11-07 07:59:51,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:59:51,164 INFO L470 AbstractCegarLoop]: Abstraction has 183 states and 183 transitions. [2021-11-07 07:59:51,164 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.010989010989011) internal successors, (183), 91 states have internal predecessors, (183), 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 07:59:51,165 INFO L276 IsEmpty]: Start isEmpty. Operand 183 states and 183 transitions. [2021-11-07 07:59:51,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2021-11-07 07:59:51,166 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:59:51,166 INFO L513 BasicCegarLoop]: trace histogram [88, 88, 1, 1, 1, 1, 1, 1] [2021-11-07 07:59:51,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2021-11-07 07:59:51,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:59:51,382 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:59:51,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:59:51,382 INFO L85 PathProgramCache]: Analyzing trace with hash 121235037, now seen corresponding path program 88 times [2021-11-07 07:59:51,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:59:51,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162768719] [2021-11-07 07:59:51,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:59:51,383 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:59:51,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 07:59:54,400 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:59:54,400 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 07:59:54,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162768719] [2021-11-07 07:59:54,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162768719] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:59:54,400 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916288509] [2021-11-07 07:59:54,400 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 07:59:54,400 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:59:54,401 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 07:59:54,401 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 07:59:54,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-11-07 07:59:57,048 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 07:59:57,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 07:59:57,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 90 conjunts are in the unsatisfiable core [2021-11-07 07:59:57,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 07:59:57,540 INFO L134 CoverageAnalysis]: Checked inductivity of 7744 backedges. 0 proven. 7744 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 07:59:57,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916288509] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 07:59:57,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 07:59:57,540 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 92 [2021-11-07 07:59:57,540 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426500402] [2021-11-07 07:59:57,541 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-11-07 07:59:57,541 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 07:59:57,541 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-11-07 07:59:57,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2021-11-07 07:59:57,542 INFO L87 Difference]: Start difference. First operand 183 states and 183 transitions. Second operand has 92 states, 92 states have (on average 2.010869565217391) internal successors, (185), 92 states have internal predecessors, (185), 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 07:59:57,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 07:59:57,769 INFO L93 Difference]: Finished difference Result 190 states and 190 transitions. [2021-11-07 07:59:57,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-11-07 07:59:57,769 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 2.010869565217391) internal successors, (185), 92 states have internal predecessors, (185), 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 182 [2021-11-07 07:59:57,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 07:59:57,770 INFO L225 Difference]: With dead ends: 190 [2021-11-07 07:59:57,770 INFO L226 Difference]: Without dead ends: 186 [2021-11-07 07:59:57,771 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 272 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2021-11-07 07:59:57,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2021-11-07 07:59:57,775 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 185. [2021-11-07 07:59:57,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 185 states, 184 states have (on average 1.0054347826086956) internal successors, (185), 184 states have internal predecessors, (185), 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 07:59:57,776 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 185 states to 185 states and 185 transitions. [2021-11-07 07:59:57,776 INFO L78 Accepts]: Start accepts. Automaton has 185 states and 185 transitions. Word has length 182 [2021-11-07 07:59:57,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 07:59:57,777 INFO L470 AbstractCegarLoop]: Abstraction has 185 states and 185 transitions. [2021-11-07 07:59:57,777 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 2.010869565217391) internal successors, (185), 92 states have internal predecessors, (185), 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 07:59:57,777 INFO L276 IsEmpty]: Start isEmpty. Operand 185 states and 185 transitions. [2021-11-07 07:59:57,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 185 [2021-11-07 07:59:57,779 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 07:59:57,779 INFO L513 BasicCegarLoop]: trace histogram [89, 89, 1, 1, 1, 1, 1, 1] [2021-11-07 07:59:57,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-11-07 07:59:58,005 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 07:59:58,006 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 07:59:58,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 07:59:58,006 INFO L85 PathProgramCache]: Analyzing trace with hash 595985887, now seen corresponding path program 89 times [2021-11-07 07:59:58,006 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 07:59:58,006 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957314020] [2021-11-07 07:59:58,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 07:59:58,007 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 07:59:58,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:00:01,005 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 0 proven. 7921 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:00:01,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:00:01,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957314020] [2021-11-07 08:00:01,006 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957314020] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:00:01,006 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1140230095] [2021-11-07 08:00:01,006 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:00:01,006 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:00:01,006 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:00:01,007 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:00:01,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-11-07 08:00:03,789 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 90 check-sat command(s) [2021-11-07 08:00:03,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:00:03,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 302 conjuncts, 91 conjunts are in the unsatisfiable core [2021-11-07 08:00:03,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:00:04,276 INFO L134 CoverageAnalysis]: Checked inductivity of 7921 backedges. 0 proven. 7921 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:00:04,277 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1140230095] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:00:04,277 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:00:04,277 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 93 [2021-11-07 08:00:04,277 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814993182] [2021-11-07 08:00:04,277 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2021-11-07 08:00:04,277 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:00:04,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-11-07 08:00:04,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2021-11-07 08:00:04,279 INFO L87 Difference]: Start difference. First operand 185 states and 185 transitions. Second operand has 93 states, 93 states have (on average 2.010752688172043) internal successors, (187), 93 states have internal predecessors, (187), 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 08:00:04,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:00:04,474 INFO L93 Difference]: Finished difference Result 192 states and 192 transitions. [2021-11-07 08:00:04,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-11-07 08:00:04,474 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 2.010752688172043) internal successors, (187), 93 states have internal predecessors, (187), 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 184 [2021-11-07 08:00:04,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:00:04,475 INFO L225 Difference]: With dead ends: 192 [2021-11-07 08:00:04,475 INFO L226 Difference]: Without dead ends: 188 [2021-11-07 08:00:04,476 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 275 GetRequests, 184 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2021-11-07 08:00:04,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2021-11-07 08:00:04,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 187. [2021-11-07 08:00:04,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 186 states have (on average 1.0053763440860215) internal successors, (187), 186 states have internal predecessors, (187), 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 08:00:04,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 187 transitions. [2021-11-07 08:00:04,484 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 187 transitions. Word has length 184 [2021-11-07 08:00:04,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:00:04,484 INFO L470 AbstractCegarLoop]: Abstraction has 187 states and 187 transitions. [2021-11-07 08:00:04,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 2.010752688172043) internal successors, (187), 93 states have internal predecessors, (187), 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 08:00:04,485 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 187 transitions. [2021-11-07 08:00:04,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 187 [2021-11-07 08:00:04,486 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:00:04,486 INFO L513 BasicCegarLoop]: trace histogram [90, 90, 1, 1, 1, 1, 1, 1] [2021-11-07 08:00:04,535 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-11-07 08:00:04,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-11-07 08:00:04,701 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:00:04,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:00:04,701 INFO L85 PathProgramCache]: Analyzing trace with hash 1565019361, now seen corresponding path program 90 times [2021-11-07 08:00:04,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:00:04,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104911024] [2021-11-07 08:00:04,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:00:04,701 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:00:04,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:00:07,764 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:00:07,764 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:00:07,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104911024] [2021-11-07 08:00:07,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104911024] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:00:07,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670162166] [2021-11-07 08:00:07,764 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:00:07,764 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:00:07,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:00:07,765 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:00:07,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-11-07 08:00:10,641 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 91 check-sat command(s) [2021-11-07 08:00:10,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:00:10,645 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 92 conjunts are in the unsatisfiable core [2021-11-07 08:00:10,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:00:11,200 INFO L134 CoverageAnalysis]: Checked inductivity of 8100 backedges. 0 proven. 8100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:00:11,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1670162166] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:00:11,200 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:00:11,200 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 94 [2021-11-07 08:00:11,200 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [904647170] [2021-11-07 08:00:11,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-11-07 08:00:11,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:00:11,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-11-07 08:00:11,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2021-11-07 08:00:11,203 INFO L87 Difference]: Start difference. First operand 187 states and 187 transitions. Second operand has 94 states, 94 states have (on average 2.0106382978723403) internal successors, (189), 94 states have internal predecessors, (189), 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 08:00:11,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:00:11,425 INFO L93 Difference]: Finished difference Result 194 states and 194 transitions. [2021-11-07 08:00:11,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-11-07 08:00:11,426 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.0106382978723403) internal successors, (189), 94 states have internal predecessors, (189), 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 186 [2021-11-07 08:00:11,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:00:11,427 INFO L225 Difference]: With dead ends: 194 [2021-11-07 08:00:11,427 INFO L226 Difference]: Without dead ends: 190 [2021-11-07 08:00:11,427 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 278 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2021-11-07 08:00:11,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2021-11-07 08:00:11,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 189. [2021-11-07 08:00:11,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 189 states, 188 states have (on average 1.0053191489361701) internal successors, (189), 188 states have internal predecessors, (189), 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 08:00:11,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 189 states to 189 states and 189 transitions. [2021-11-07 08:00:11,431 INFO L78 Accepts]: Start accepts. Automaton has 189 states and 189 transitions. Word has length 186 [2021-11-07 08:00:11,431 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:00:11,431 INFO L470 AbstractCegarLoop]: Abstraction has 189 states and 189 transitions. [2021-11-07 08:00:11,432 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.0106382978723403) internal successors, (189), 94 states have internal predecessors, (189), 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 08:00:11,432 INFO L276 IsEmpty]: Start isEmpty. Operand 189 states and 189 transitions. [2021-11-07 08:00:11,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 189 [2021-11-07 08:00:11,433 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:00:11,433 INFO L513 BasicCegarLoop]: trace histogram [91, 91, 1, 1, 1, 1, 1, 1] [2021-11-07 08:00:11,465 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Ended with exit code 0 [2021-11-07 08:00:11,633 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:00:11,634 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:00:11,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:00:11,634 INFO L85 PathProgramCache]: Analyzing trace with hash 798284643, now seen corresponding path program 91 times [2021-11-07 08:00:11,634 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:00:11,634 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528266369] [2021-11-07 08:00:11,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:00:11,634 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:00:11,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:00:14,853 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 8281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:00:14,853 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:00:14,853 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528266369] [2021-11-07 08:00:14,853 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528266369] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:00:14,854 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562104697] [2021-11-07 08:00:14,854 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:00:14,854 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:00:14,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:00:14,855 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:00:14,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-11-07 08:00:17,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:00:17,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 308 conjuncts, 93 conjunts are in the unsatisfiable core [2021-11-07 08:00:17,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:00:18,460 INFO L134 CoverageAnalysis]: Checked inductivity of 8281 backedges. 0 proven. 8281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:00:18,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1562104697] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:00:18,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:00:18,461 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 95 [2021-11-07 08:00:18,461 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846070167] [2021-11-07 08:00:18,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2021-11-07 08:00:18,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:00:18,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-11-07 08:00:18,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2021-11-07 08:00:18,463 INFO L87 Difference]: Start difference. First operand 189 states and 189 transitions. Second operand has 95 states, 95 states have (on average 2.0105263157894737) internal successors, (191), 95 states have internal predecessors, (191), 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 08:00:18,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:00:18,711 INFO L93 Difference]: Finished difference Result 196 states and 196 transitions. [2021-11-07 08:00:18,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-11-07 08:00:18,712 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 2.0105263157894737) internal successors, (191), 95 states have internal predecessors, (191), 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 188 [2021-11-07 08:00:18,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:00:18,713 INFO L225 Difference]: With dead ends: 196 [2021-11-07 08:00:18,713 INFO L226 Difference]: Without dead ends: 192 [2021-11-07 08:00:18,714 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2021-11-07 08:00:18,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-11-07 08:00:18,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 191. [2021-11-07 08:00:18,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 190 states have (on average 1.0052631578947369) internal successors, (191), 190 states have internal predecessors, (191), 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 08:00:18,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 191 transitions. [2021-11-07 08:00:18,717 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 191 transitions. Word has length 188 [2021-11-07 08:00:18,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:00:18,717 INFO L470 AbstractCegarLoop]: Abstraction has 191 states and 191 transitions. [2021-11-07 08:00:18,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 2.0105263157894737) internal successors, (191), 95 states have internal predecessors, (191), 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 08:00:18,718 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 191 transitions. [2021-11-07 08:00:18,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 191 [2021-11-07 08:00:18,718 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:00:18,719 INFO L513 BasicCegarLoop]: trace histogram [92, 92, 1, 1, 1, 1, 1, 1] [2021-11-07 08:00:18,753 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2021-11-07 08:00:18,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:00:18,919 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:00:18,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:00:18,920 INFO L85 PathProgramCache]: Analyzing trace with hash -1594371739, now seen corresponding path program 92 times [2021-11-07 08:00:18,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:00:18,920 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191003727] [2021-11-07 08:00:18,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:00:18,920 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:00:18,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:00:22,415 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 0 proven. 8464 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:00:22,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:00:22,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191003727] [2021-11-07 08:00:22,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191003727] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:00:22,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794793833] [2021-11-07 08:00:22,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:00:22,416 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:00:22,416 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:00:22,417 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:00:22,418 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-11-07 08:00:25,484 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:00:25,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:00:25,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 311 conjuncts, 94 conjunts are in the unsatisfiable core [2021-11-07 08:00:25,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:00:26,041 INFO L134 CoverageAnalysis]: Checked inductivity of 8464 backedges. 0 proven. 8464 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:00:26,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1794793833] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:00:26,042 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:00:26,042 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 96 [2021-11-07 08:00:26,042 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248209634] [2021-11-07 08:00:26,043 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-11-07 08:00:26,043 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:00:26,044 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-11-07 08:00:26,044 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2021-11-07 08:00:26,044 INFO L87 Difference]: Start difference. First operand 191 states and 191 transitions. Second operand has 96 states, 96 states have (on average 2.0104166666666665) internal successors, (193), 96 states have internal predecessors, (193), 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 08:00:26,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:00:26,297 INFO L93 Difference]: Finished difference Result 198 states and 198 transitions. [2021-11-07 08:00:26,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-11-07 08:00:26,298 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.0104166666666665) internal successors, (193), 96 states have internal predecessors, (193), 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 190 [2021-11-07 08:00:26,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:00:26,299 INFO L225 Difference]: With dead ends: 198 [2021-11-07 08:00:26,299 INFO L226 Difference]: Without dead ends: 194 [2021-11-07 08:00:26,300 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 284 GetRequests, 190 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2021-11-07 08:00:26,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2021-11-07 08:00:26,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 193. [2021-11-07 08:00:26,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 193 states, 192 states have (on average 1.0052083333333333) internal successors, (193), 192 states have internal predecessors, (193), 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 08:00:26,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 193 states to 193 states and 193 transitions. [2021-11-07 08:00:26,304 INFO L78 Accepts]: Start accepts. Automaton has 193 states and 193 transitions. Word has length 190 [2021-11-07 08:00:26,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:00:26,304 INFO L470 AbstractCegarLoop]: Abstraction has 193 states and 193 transitions. [2021-11-07 08:00:26,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.0104166666666665) internal successors, (193), 96 states have internal predecessors, (193), 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 08:00:26,304 INFO L276 IsEmpty]: Start isEmpty. Operand 193 states and 193 transitions. [2021-11-07 08:00:26,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 193 [2021-11-07 08:00:26,306 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:00:26,306 INFO L513 BasicCegarLoop]: trace histogram [93, 93, 1, 1, 1, 1, 1, 1] [2021-11-07 08:00:26,336 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2021-11-07 08:00:26,509 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:00:26,510 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:00:26,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:00:26,510 INFO L85 PathProgramCache]: Analyzing trace with hash 1165315815, now seen corresponding path program 93 times [2021-11-07 08:00:26,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:00:26,510 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1957614816] [2021-11-07 08:00:26,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:00:26,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:00:26,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:00:29,943 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 0 proven. 8649 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:00:29,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:00:29,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1957614816] [2021-11-07 08:00:29,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1957614816] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:00:29,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925857201] [2021-11-07 08:00:29,944 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:00:29,944 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:00:29,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:00:29,947 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:00:29,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-11-07 08:00:33,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 94 check-sat command(s) [2021-11-07 08:00:33,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:00:33,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 314 conjuncts, 95 conjunts are in the unsatisfiable core [2021-11-07 08:00:33,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:00:33,750 INFO L134 CoverageAnalysis]: Checked inductivity of 8649 backedges. 0 proven. 8649 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:00:33,750 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925857201] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:00:33,750 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:00:33,750 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 97 [2021-11-07 08:00:33,750 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2065882544] [2021-11-07 08:00:33,751 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-11-07 08:00:33,751 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:00:33,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-11-07 08:00:33,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-11-07 08:00:33,752 INFO L87 Difference]: Start difference. First operand 193 states and 193 transitions. Second operand has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 97 states have internal predecessors, (195), 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 08:00:33,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:00:33,997 INFO L93 Difference]: Finished difference Result 200 states and 200 transitions. [2021-11-07 08:00:33,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-11-07 08:00:33,998 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 97 states have internal predecessors, (195), 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 192 [2021-11-07 08:00:33,998 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:00:33,999 INFO L225 Difference]: With dead ends: 200 [2021-11-07 08:00:33,999 INFO L226 Difference]: Without dead ends: 196 [2021-11-07 08:00:34,000 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 287 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-11-07 08:00:34,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2021-11-07 08:00:34,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 195. [2021-11-07 08:00:34,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 195 states, 194 states have (on average 1.0051546391752577) internal successors, (195), 194 states have internal predecessors, (195), 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 08:00:34,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 195 states to 195 states and 195 transitions. [2021-11-07 08:00:34,004 INFO L78 Accepts]: Start accepts. Automaton has 195 states and 195 transitions. Word has length 192 [2021-11-07 08:00:34,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:00:34,005 INFO L470 AbstractCegarLoop]: Abstraction has 195 states and 195 transitions. [2021-11-07 08:00:34,005 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 2.0103092783505154) internal successors, (195), 97 states have internal predecessors, (195), 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 08:00:34,005 INFO L276 IsEmpty]: Start isEmpty. Operand 195 states and 195 transitions. [2021-11-07 08:00:34,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2021-11-07 08:00:34,006 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:00:34,007 INFO L513 BasicCegarLoop]: trace histogram [94, 94, 1, 1, 1, 1, 1, 1] [2021-11-07 08:00:34,056 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2021-11-07 08:00:34,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:00:34,234 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:00:34,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:00:34,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1064733719, now seen corresponding path program 94 times [2021-11-07 08:00:34,234 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:00:34,234 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219700613] [2021-11-07 08:00:34,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:00:34,234 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:00:34,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:00:37,834 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:00:37,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:00:37,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219700613] [2021-11-07 08:00:37,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219700613] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:00:37,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [256415838] [2021-11-07 08:00:37,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:00:37,835 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:00:37,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:00:37,836 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:00:37,837 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-11-07 08:00:41,081 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:00:41,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:00:41,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 317 conjuncts, 96 conjunts are in the unsatisfiable core [2021-11-07 08:00:41,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:00:41,755 INFO L134 CoverageAnalysis]: Checked inductivity of 8836 backedges. 0 proven. 8836 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:00:41,756 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [256415838] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:00:41,756 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:00:41,756 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 98 [2021-11-07 08:00:41,756 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687663202] [2021-11-07 08:00:41,757 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2021-11-07 08:00:41,757 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:00:41,759 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-11-07 08:00:41,760 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2021-11-07 08:00:41,761 INFO L87 Difference]: Start difference. First operand 195 states and 195 transitions. Second operand has 98 states, 98 states have (on average 2.010204081632653) internal successors, (197), 98 states have internal predecessors, (197), 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 08:00:42,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:00:42,100 INFO L93 Difference]: Finished difference Result 202 states and 202 transitions. [2021-11-07 08:00:42,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-11-07 08:00:42,101 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.010204081632653) internal successors, (197), 98 states have internal predecessors, (197), 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 194 [2021-11-07 08:00:42,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:00:42,103 INFO L225 Difference]: With dead ends: 202 [2021-11-07 08:00:42,103 INFO L226 Difference]: Without dead ends: 198 [2021-11-07 08:00:42,104 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 194 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2021-11-07 08:00:42,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2021-11-07 08:00:42,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 197. [2021-11-07 08:00:42,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 196 states have (on average 1.0051020408163265) internal successors, (197), 196 states have internal predecessors, (197), 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 08:00:42,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 197 transitions. [2021-11-07 08:00:42,110 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 197 transitions. Word has length 194 [2021-11-07 08:00:42,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:00:42,110 INFO L470 AbstractCegarLoop]: Abstraction has 197 states and 197 transitions. [2021-11-07 08:00:42,111 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.010204081632653) internal successors, (197), 98 states have internal predecessors, (197), 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 08:00:42,111 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 197 transitions. [2021-11-07 08:00:42,112 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2021-11-07 08:00:42,112 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:00:42,112 INFO L513 BasicCegarLoop]: trace histogram [95, 95, 1, 1, 1, 1, 1, 1] [2021-11-07 08:00:42,170 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-11-07 08:00:42,333 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:00:42,334 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:00:42,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:00:42,334 INFO L85 PathProgramCache]: Analyzing trace with hash -953655189, now seen corresponding path program 95 times [2021-11-07 08:00:42,334 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:00:42,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183054943] [2021-11-07 08:00:42,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:00:42,334 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:00:42,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:00:45,987 INFO L134 CoverageAnalysis]: Checked inductivity of 9025 backedges. 0 proven. 9025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:00:45,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:00:45,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183054943] [2021-11-07 08:00:45,987 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183054943] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:00:45,987 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663778078] [2021-11-07 08:00:45,988 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:00:45,988 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:00:45,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:00:45,989 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:00:45,994 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-11-07 08:00:49,407 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 96 check-sat command(s) [2021-11-07 08:00:49,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:00:49,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 97 conjunts are in the unsatisfiable core [2021-11-07 08:00:49,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:00:49,992 INFO L134 CoverageAnalysis]: Checked inductivity of 9025 backedges. 0 proven. 9025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:00:49,992 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663778078] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:00:49,992 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:00:49,993 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 99 [2021-11-07 08:00:49,993 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94254980] [2021-11-07 08:00:49,993 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-11-07 08:00:49,993 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:00:49,994 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-11-07 08:00:49,995 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2021-11-07 08:00:49,995 INFO L87 Difference]: Start difference. First operand 197 states and 197 transitions. Second operand has 99 states, 99 states have (on average 2.01010101010101) internal successors, (199), 99 states have internal predecessors, (199), 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 08:00:50,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:00:50,260 INFO L93 Difference]: Finished difference Result 204 states and 204 transitions. [2021-11-07 08:00:50,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-11-07 08:00:50,260 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 2.01010101010101) internal successors, (199), 99 states have internal predecessors, (199), 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 196 [2021-11-07 08:00:50,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:00:50,262 INFO L225 Difference]: With dead ends: 204 [2021-11-07 08:00:50,262 INFO L226 Difference]: Without dead ends: 200 [2021-11-07 08:00:50,262 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 196 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2021-11-07 08:00:50,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2021-11-07 08:00:50,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 199. [2021-11-07 08:00:50,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 199 states, 198 states have (on average 1.005050505050505) internal successors, (199), 198 states have internal predecessors, (199), 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 08:00:50,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 199 states to 199 states and 199 transitions. [2021-11-07 08:00:50,265 INFO L78 Accepts]: Start accepts. Automaton has 199 states and 199 transitions. Word has length 196 [2021-11-07 08:00:50,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:00:50,266 INFO L470 AbstractCegarLoop]: Abstraction has 199 states and 199 transitions. [2021-11-07 08:00:50,266 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 2.01010101010101) internal successors, (199), 99 states have internal predecessors, (199), 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 08:00:50,266 INFO L276 IsEmpty]: Start isEmpty. Operand 199 states and 199 transitions. [2021-11-07 08:00:50,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 199 [2021-11-07 08:00:50,267 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:00:50,267 INFO L513 BasicCegarLoop]: trace histogram [96, 96, 1, 1, 1, 1, 1, 1] [2021-11-07 08:00:50,297 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Ended with exit code 0 [2021-11-07 08:00:50,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:00:50,468 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:00:50,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:00:50,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1581370259, now seen corresponding path program 96 times [2021-11-07 08:00:50,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:00:50,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839134381] [2021-11-07 08:00:50,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:00:50,469 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:00:50,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:00:54,236 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 0 proven. 9216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:00:54,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:00:54,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839134381] [2021-11-07 08:00:54,236 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1839134381] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:00:54,236 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413044588] [2021-11-07 08:00:54,236 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:00:54,237 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:00:54,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:00:54,237 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:00:54,239 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-11-07 08:00:57,594 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 97 check-sat command(s) [2021-11-07 08:00:57,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:00:57,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 323 conjuncts, 98 conjunts are in the unsatisfiable core [2021-11-07 08:00:57,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:00:58,166 INFO L134 CoverageAnalysis]: Checked inductivity of 9216 backedges. 0 proven. 9216 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:00:58,166 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413044588] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:00:58,166 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:00:58,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 100 [2021-11-07 08:00:58,167 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688616705] [2021-11-07 08:00:58,167 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2021-11-07 08:00:58,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:00:58,168 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-11-07 08:00:58,169 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2021-11-07 08:00:58,169 INFO L87 Difference]: Start difference. First operand 199 states and 199 transitions. Second operand has 100 states, 100 states have (on average 2.01) internal successors, (201), 100 states have internal predecessors, (201), 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 08:00:58,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:00:58,421 INFO L93 Difference]: Finished difference Result 206 states and 206 transitions. [2021-11-07 08:00:58,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-11-07 08:00:58,422 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.01) internal successors, (201), 100 states have internal predecessors, (201), 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 198 [2021-11-07 08:00:58,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:00:58,423 INFO L225 Difference]: With dead ends: 206 [2021-11-07 08:00:58,470 INFO L226 Difference]: Without dead ends: 202 [2021-11-07 08:00:58,471 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 296 GetRequests, 198 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2021-11-07 08:00:58,471 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2021-11-07 08:00:58,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 201. [2021-11-07 08:00:58,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 200 states have (on average 1.005) internal successors, (201), 200 states have internal predecessors, (201), 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 08:00:58,475 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 201 transitions. [2021-11-07 08:00:58,475 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 201 transitions. Word has length 198 [2021-11-07 08:00:58,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:00:58,475 INFO L470 AbstractCegarLoop]: Abstraction has 201 states and 201 transitions. [2021-11-07 08:00:58,475 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.01) internal successors, (201), 100 states have internal predecessors, (201), 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 08:00:58,475 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 201 transitions. [2021-11-07 08:00:58,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 201 [2021-11-07 08:00:58,476 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:00:58,476 INFO L513 BasicCegarLoop]: trace histogram [97, 97, 1, 1, 1, 1, 1, 1] [2021-11-07 08:00:58,513 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Ended with exit code 0 [2021-11-07 08:00:58,677 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2021-11-07 08:00:58,677 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:00:58,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:00:58,677 INFO L85 PathProgramCache]: Analyzing trace with hash 774836207, now seen corresponding path program 97 times [2021-11-07 08:00:58,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:00:58,678 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451142564] [2021-11-07 08:00:58,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:00:58,678 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:00:58,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:01:02,508 INFO L134 CoverageAnalysis]: Checked inductivity of 9409 backedges. 0 proven. 9409 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:01:02,508 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:01:02,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451142564] [2021-11-07 08:01:02,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451142564] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:01:02,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852113572] [2021-11-07 08:01:02,509 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:01:02,509 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:01:02,509 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:01:02,529 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:01:02,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-11-07 08:01:05,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:01:05,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 326 conjuncts, 99 conjunts are in the unsatisfiable core [2021-11-07 08:01:05,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:01:06,493 INFO L134 CoverageAnalysis]: Checked inductivity of 9409 backedges. 0 proven. 9409 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:01:06,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852113572] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:01:06,494 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:01:06,494 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 101 [2021-11-07 08:01:06,494 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2004838987] [2021-11-07 08:01:06,495 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2021-11-07 08:01:06,495 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:01:06,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-11-07 08:01:06,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2021-11-07 08:01:06,496 INFO L87 Difference]: Start difference. First operand 201 states and 201 transitions. Second operand has 101 states, 101 states have (on average 2.00990099009901) internal successors, (203), 101 states have internal predecessors, (203), 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 08:01:06,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:01:06,747 INFO L93 Difference]: Finished difference Result 208 states and 208 transitions. [2021-11-07 08:01:06,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-11-07 08:01:06,748 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.00990099009901) internal successors, (203), 101 states have internal predecessors, (203), 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 200 [2021-11-07 08:01:06,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:01:06,749 INFO L225 Difference]: With dead ends: 208 [2021-11-07 08:01:06,749 INFO L226 Difference]: Without dead ends: 204 [2021-11-07 08:01:06,749 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 299 GetRequests, 200 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 3.6s TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2021-11-07 08:01:06,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2021-11-07 08:01:06,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 203. [2021-11-07 08:01:06,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 203 states, 202 states have (on average 1.004950495049505) internal successors, (203), 202 states have internal predecessors, (203), 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 08:01:06,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 203 states to 203 states and 203 transitions. [2021-11-07 08:01:06,752 INFO L78 Accepts]: Start accepts. Automaton has 203 states and 203 transitions. Word has length 200 [2021-11-07 08:01:06,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:01:06,753 INFO L470 AbstractCegarLoop]: Abstraction has 203 states and 203 transitions. [2021-11-07 08:01:06,753 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.00990099009901) internal successors, (203), 101 states have internal predecessors, (203), 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 08:01:06,753 INFO L276 IsEmpty]: Start isEmpty. Operand 203 states and 203 transitions. [2021-11-07 08:01:06,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 203 [2021-11-07 08:01:06,754 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:01:06,754 INFO L513 BasicCegarLoop]: trace histogram [98, 98, 1, 1, 1, 1, 1, 1] [2021-11-07 08:01:06,784 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2021-11-07 08:01:06,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:01:06,954 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:01:06,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:01:06,955 INFO L85 PathProgramCache]: Analyzing trace with hash 1641485041, now seen corresponding path program 98 times [2021-11-07 08:01:06,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:01:06,955 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125698799] [2021-11-07 08:01:06,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:01:06,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:01:07,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:01:11,112 INFO L134 CoverageAnalysis]: Checked inductivity of 9604 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:01:11,112 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:01:11,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125698799] [2021-11-07 08:01:11,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1125698799] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:01:11,112 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742782670] [2021-11-07 08:01:11,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:01:11,112 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:01:11,113 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:01:11,113 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:01:11,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-11-07 08:01:14,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:01:14,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:01:14,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 329 conjuncts, 100 conjunts are in the unsatisfiable core [2021-11-07 08:01:14,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:01:15,303 INFO L134 CoverageAnalysis]: Checked inductivity of 9604 backedges. 0 proven. 9604 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:01:15,303 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [742782670] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:01:15,303 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:01:15,303 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 102 [2021-11-07 08:01:15,303 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965098292] [2021-11-07 08:01:15,304 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2021-11-07 08:01:15,304 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:01:15,305 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-11-07 08:01:15,306 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2021-11-07 08:01:15,306 INFO L87 Difference]: Start difference. First operand 203 states and 203 transitions. Second operand has 102 states, 102 states have (on average 2.0098039215686274) internal successors, (205), 102 states have internal predecessors, (205), 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 08:01:15,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:01:15,601 INFO L93 Difference]: Finished difference Result 210 states and 210 transitions. [2021-11-07 08:01:15,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-11-07 08:01:15,601 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 2.0098039215686274) internal successors, (205), 102 states have internal predecessors, (205), 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 202 [2021-11-07 08:01:15,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:01:15,603 INFO L225 Difference]: With dead ends: 210 [2021-11-07 08:01:15,603 INFO L226 Difference]: Without dead ends: 206 [2021-11-07 08:01:15,603 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2021-11-07 08:01:15,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2021-11-07 08:01:15,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 205. [2021-11-07 08:01:15,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 204 states have (on average 1.0049019607843137) internal successors, (205), 204 states have internal predecessors, (205), 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 08:01:15,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 205 transitions. [2021-11-07 08:01:15,607 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 205 transitions. Word has length 202 [2021-11-07 08:01:15,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:01:15,607 INFO L470 AbstractCegarLoop]: Abstraction has 205 states and 205 transitions. [2021-11-07 08:01:15,607 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 2.0098039215686274) internal successors, (205), 102 states have internal predecessors, (205), 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 08:01:15,607 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 205 transitions. [2021-11-07 08:01:15,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 205 [2021-11-07 08:01:15,608 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:01:15,609 INFO L513 BasicCegarLoop]: trace histogram [99, 99, 1, 1, 1, 1, 1, 1] [2021-11-07 08:01:15,652 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2021-11-07 08:01:15,829 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:01:15,830 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:01:15,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:01:15,830 INFO L85 PathProgramCache]: Analyzing trace with hash 1267359091, now seen corresponding path program 99 times [2021-11-07 08:01:15,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:01:15,830 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103251895] [2021-11-07 08:01:15,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:01:15,830 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:01:15,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:01:19,944 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:01:19,944 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:01:19,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103251895] [2021-11-07 08:01:19,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103251895] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:01:19,945 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597314649] [2021-11-07 08:01:19,945 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:01:19,945 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:01:19,945 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:01:19,946 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:01:19,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-11-07 08:01:23,655 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 100 check-sat command(s) [2021-11-07 08:01:23,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:01:23,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 101 conjunts are in the unsatisfiable core [2021-11-07 08:01:23,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:01:24,285 INFO L134 CoverageAnalysis]: Checked inductivity of 9801 backedges. 0 proven. 9801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:01:24,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597314649] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:01:24,285 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:01:24,286 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 103 [2021-11-07 08:01:24,286 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267525594] [2021-11-07 08:01:24,286 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2021-11-07 08:01:24,286 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:01:24,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-11-07 08:01:24,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2021-11-07 08:01:24,288 INFO L87 Difference]: Start difference. First operand 205 states and 205 transitions. Second operand has 103 states, 103 states have (on average 2.0097087378640777) internal successors, (207), 103 states have internal predecessors, (207), 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 08:01:24,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:01:24,549 INFO L93 Difference]: Finished difference Result 212 states and 212 transitions. [2021-11-07 08:01:24,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-11-07 08:01:24,550 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.0097087378640777) internal successors, (207), 103 states have internal predecessors, (207), 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 204 [2021-11-07 08:01:24,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:01:24,552 INFO L225 Difference]: With dead ends: 212 [2021-11-07 08:01:24,552 INFO L226 Difference]: Without dead ends: 208 [2021-11-07 08:01:24,553 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 305 GetRequests, 204 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2021-11-07 08:01:24,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2021-11-07 08:01:24,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 207. [2021-11-07 08:01:24,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 206 states have (on average 1.0048543689320388) internal successors, (207), 206 states have internal predecessors, (207), 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 08:01:24,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 207 transitions. [2021-11-07 08:01:24,559 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 207 transitions. Word has length 204 [2021-11-07 08:01:24,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:01:24,559 INFO L470 AbstractCegarLoop]: Abstraction has 207 states and 207 transitions. [2021-11-07 08:01:24,560 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.0097087378640777) internal successors, (207), 103 states have internal predecessors, (207), 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 08:01:24,560 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 207 transitions. [2021-11-07 08:01:24,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 207 [2021-11-07 08:01:24,561 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:01:24,562 INFO L513 BasicCegarLoop]: trace histogram [100, 100, 1, 1, 1, 1, 1, 1] [2021-11-07 08:01:24,621 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2021-11-07 08:01:24,789 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:01:24,790 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:01:24,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:01:24,790 INFO L85 PathProgramCache]: Analyzing trace with hash -1785393291, now seen corresponding path program 100 times [2021-11-07 08:01:24,790 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:01:24,790 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93320740] [2021-11-07 08:01:24,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:01:24,790 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:01:24,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:01:28,844 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 0 proven. 10000 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:01:28,844 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:01:28,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93320740] [2021-11-07 08:01:28,844 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [93320740] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:01:28,844 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268736607] [2021-11-07 08:01:28,844 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:01:28,845 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:01:28,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:01:28,845 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:01:28,846 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-11-07 08:01:32,441 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:01:32,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:01:32,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 102 conjunts are in the unsatisfiable core [2021-11-07 08:01:32,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:01:33,066 INFO L134 CoverageAnalysis]: Checked inductivity of 10000 backedges. 0 proven. 10000 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:01:33,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268736607] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:01:33,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:01:33,067 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [103, 103] total 104 [2021-11-07 08:01:33,067 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885980594] [2021-11-07 08:01:33,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2021-11-07 08:01:33,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:01:33,069 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2021-11-07 08:01:33,070 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2021-11-07 08:01:33,070 INFO L87 Difference]: Start difference. First operand 207 states and 207 transitions. Second operand has 104 states, 104 states have (on average 2.0096153846153846) internal successors, (209), 104 states have internal predecessors, (209), 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 08:01:33,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:01:33,364 INFO L93 Difference]: Finished difference Result 214 states and 214 transitions. [2021-11-07 08:01:33,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-11-07 08:01:33,364 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.0096153846153846) internal successors, (209), 104 states have internal predecessors, (209), 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 206 [2021-11-07 08:01:33,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:01:33,365 INFO L225 Difference]: With dead ends: 214 [2021-11-07 08:01:33,365 INFO L226 Difference]: Without dead ends: 210 [2021-11-07 08:01:33,366 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 308 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 102 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5356, Invalid=5356, Unknown=0, NotChecked=0, Total=10712 [2021-11-07 08:01:33,366 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2021-11-07 08:01:33,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 209. [2021-11-07 08:01:33,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 209 states, 208 states have (on average 1.0048076923076923) internal successors, (209), 208 states have internal predecessors, (209), 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 08:01:33,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 209 states to 209 states and 209 transitions. [2021-11-07 08:01:33,369 INFO L78 Accepts]: Start accepts. Automaton has 209 states and 209 transitions. Word has length 206 [2021-11-07 08:01:33,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:01:33,369 INFO L470 AbstractCegarLoop]: Abstraction has 209 states and 209 transitions. [2021-11-07 08:01:33,370 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.0096153846153846) internal successors, (209), 104 states have internal predecessors, (209), 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 08:01:33,370 INFO L276 IsEmpty]: Start isEmpty. Operand 209 states and 209 transitions. [2021-11-07 08:01:33,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2021-11-07 08:01:33,370 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:01:33,371 INFO L513 BasicCegarLoop]: trace histogram [101, 101, 1, 1, 1, 1, 1, 1] [2021-11-07 08:01:33,404 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2021-11-07 08:01:33,571 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-11-07 08:01:33,571 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:01:33,572 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:01:33,572 INFO L85 PathProgramCache]: Analyzing trace with hash -2017769225, now seen corresponding path program 101 times [2021-11-07 08:01:33,572 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:01:33,572 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908452500] [2021-11-07 08:01:33,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:01:33,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:01:33,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:01:37,536 INFO L134 CoverageAnalysis]: Checked inductivity of 10201 backedges. 0 proven. 10201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:01:37,537 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:01:37,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908452500] [2021-11-07 08:01:37,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1908452500] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:01:37,537 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960000267] [2021-11-07 08:01:37,537 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:01:37,537 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:01:37,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:01:37,538 INFO L229 MonitoredProcess]: Starting monitored process 102 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:01:37,539 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Waiting until timeout for monitored process [2021-11-07 08:01:41,346 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 102 check-sat command(s) [2021-11-07 08:01:41,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:01:41,349 INFO L263 TraceCheckSpWp]: Trace formula consists of 338 conjuncts, 103 conjunts are in the unsatisfiable core [2021-11-07 08:01:41,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:01:42,094 INFO L134 CoverageAnalysis]: Checked inductivity of 10201 backedges. 0 proven. 10201 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:01:42,094 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960000267] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:01:42,095 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:01:42,095 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 105 [2021-11-07 08:01:42,095 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896332762] [2021-11-07 08:01:42,096 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2021-11-07 08:01:42,096 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:01:42,097 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2021-11-07 08:01:42,098 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2021-11-07 08:01:42,099 INFO L87 Difference]: Start difference. First operand 209 states and 209 transitions. Second operand has 105 states, 105 states have (on average 2.0095238095238095) internal successors, (211), 105 states have internal predecessors, (211), 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 08:01:42,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:01:42,367 INFO L93 Difference]: Finished difference Result 216 states and 216 transitions. [2021-11-07 08:01:42,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-11-07 08:01:42,368 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 2.0095238095238095) internal successors, (211), 105 states have internal predecessors, (211), 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 208 [2021-11-07 08:01:42,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:01:42,370 INFO L225 Difference]: With dead ends: 216 [2021-11-07 08:01:42,370 INFO L226 Difference]: Without dead ends: 212 [2021-11-07 08:01:42,371 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 208 SyntacticMatches, 0 SemanticMatches, 103 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=5460, Invalid=5460, Unknown=0, NotChecked=0, Total=10920 [2021-11-07 08:01:42,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2021-11-07 08:01:42,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 211. [2021-11-07 08:01:42,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 1.0047619047619047) internal successors, (211), 210 states have internal predecessors, (211), 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 08:01:42,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 211 transitions. [2021-11-07 08:01:42,378 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 211 transitions. Word has length 208 [2021-11-07 08:01:42,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:01:42,378 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 211 transitions. [2021-11-07 08:01:42,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 2.0095238095238095) internal successors, (211), 105 states have internal predecessors, (211), 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 08:01:42,378 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 211 transitions. [2021-11-07 08:01:42,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2021-11-07 08:01:42,379 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:01:42,380 INFO L513 BasicCegarLoop]: trace histogram [102, 102, 1, 1, 1, 1, 1, 1] [2021-11-07 08:01:42,410 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (102)] Ended with exit code 0 [2021-11-07 08:01:42,581 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-11-07 08:01:42,583 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:01:42,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:01:42,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1992742407, now seen corresponding path program 102 times [2021-11-07 08:01:42,584 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:01:42,584 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632844283] [2021-11-07 08:01:42,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:01:42,584 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:01:42,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:01:46,831 INFO L134 CoverageAnalysis]: Checked inductivity of 10404 backedges. 0 proven. 10404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:01:46,831 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:01:46,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632844283] [2021-11-07 08:01:46,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632844283] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:01:46,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176421719] [2021-11-07 08:01:46,831 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:01:46,831 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:01:46,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:01:46,832 INFO L229 MonitoredProcess]: Starting monitored process 103 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:01:46,833 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Waiting until timeout for monitored process [2021-11-07 08:01:50,766 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 103 check-sat command(s) [2021-11-07 08:01:50,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:01:50,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 341 conjuncts, 104 conjunts are in the unsatisfiable core [2021-11-07 08:01:50,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:01:51,434 INFO L134 CoverageAnalysis]: Checked inductivity of 10404 backedges. 0 proven. 10404 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:01:51,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176421719] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:01:51,435 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:01:51,435 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [105, 105] total 106 [2021-11-07 08:01:51,435 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758321570] [2021-11-07 08:01:51,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2021-11-07 08:01:51,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:01:51,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2021-11-07 08:01:51,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2021-11-07 08:01:51,438 INFO L87 Difference]: Start difference. First operand 211 states and 211 transitions. Second operand has 106 states, 106 states have (on average 2.009433962264151) internal successors, (213), 106 states have internal predecessors, (213), 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 08:01:51,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:01:51,737 INFO L93 Difference]: Finished difference Result 218 states and 218 transitions. [2021-11-07 08:01:51,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2021-11-07 08:01:51,738 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.009433962264151) internal successors, (213), 106 states have internal predecessors, (213), 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 210 [2021-11-07 08:01:51,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:01:51,739 INFO L225 Difference]: With dead ends: 218 [2021-11-07 08:01:51,739 INFO L226 Difference]: Without dead ends: 214 [2021-11-07 08:01:51,741 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 314 GetRequests, 210 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5565, Invalid=5565, Unknown=0, NotChecked=0, Total=11130 [2021-11-07 08:01:51,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-11-07 08:01:51,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 213. [2021-11-07 08:01:51,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 213 states, 212 states have (on average 1.0047169811320755) internal successors, (213), 212 states have internal predecessors, (213), 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 08:01:51,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 213 states to 213 states and 213 transitions. [2021-11-07 08:01:51,747 INFO L78 Accepts]: Start accepts. Automaton has 213 states and 213 transitions. Word has length 210 [2021-11-07 08:01:51,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:01:51,747 INFO L470 AbstractCegarLoop]: Abstraction has 213 states and 213 transitions. [2021-11-07 08:01:51,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.009433962264151) internal successors, (213), 106 states have internal predecessors, (213), 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 08:01:51,748 INFO L276 IsEmpty]: Start isEmpty. Operand 213 states and 213 transitions. [2021-11-07 08:01:51,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 213 [2021-11-07 08:01:51,749 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:01:51,749 INFO L513 BasicCegarLoop]: trace histogram [103, 103, 1, 1, 1, 1, 1, 1] [2021-11-07 08:01:51,788 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (103)] Forceful destruction successful, exit code 0 [2021-11-07 08:01:51,953 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 103 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2021-11-07 08:01:51,954 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:01:51,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:01:51,954 INFO L85 PathProgramCache]: Analyzing trace with hash 583193211, now seen corresponding path program 103 times [2021-11-07 08:01:51,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:01:51,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995102155] [2021-11-07 08:01:51,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:01:51,955 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:01:52,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:01:56,328 INFO L134 CoverageAnalysis]: Checked inductivity of 10609 backedges. 0 proven. 10609 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:01:56,328 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:01:56,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995102155] [2021-11-07 08:01:56,328 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995102155] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:01:56,328 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592925051] [2021-11-07 08:01:56,328 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:01:56,329 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:01:56,329 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:01:56,329 INFO L229 MonitoredProcess]: Starting monitored process 104 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:01:56,330 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Waiting until timeout for monitored process [2021-11-07 08:02:00,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:00,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 344 conjuncts, 105 conjunts are in the unsatisfiable core [2021-11-07 08:02:00,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:02:00,848 INFO L134 CoverageAnalysis]: Checked inductivity of 10609 backedges. 0 proven. 10609 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:02:00,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592925051] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:02:00,848 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:02:00,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [106, 106] total 107 [2021-11-07 08:02:00,849 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27281062] [2021-11-07 08:02:00,849 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 107 states [2021-11-07 08:02:00,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:02:00,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 107 interpolants. [2021-11-07 08:02:00,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2021-11-07 08:02:00,851 INFO L87 Difference]: Start difference. First operand 213 states and 213 transitions. Second operand has 107 states, 107 states have (on average 2.0093457943925235) internal successors, (215), 107 states have internal predecessors, (215), 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 08:02:01,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:02:01,109 INFO L93 Difference]: Finished difference Result 220 states and 220 transitions. [2021-11-07 08:02:01,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 106 states. [2021-11-07 08:02:01,110 INFO L78 Accepts]: Start accepts. Automaton has has 107 states, 107 states have (on average 2.0093457943925235) internal successors, (215), 107 states have internal predecessors, (215), 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 212 [2021-11-07 08:02:01,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:02:01,111 INFO L225 Difference]: With dead ends: 220 [2021-11-07 08:02:01,111 INFO L226 Difference]: Without dead ends: 216 [2021-11-07 08:02:01,111 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 317 GetRequests, 212 SyntacticMatches, 0 SemanticMatches, 105 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=5671, Invalid=5671, Unknown=0, NotChecked=0, Total=11342 [2021-11-07 08:02:01,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2021-11-07 08:02:01,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 215. [2021-11-07 08:02:01,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 215 states, 214 states have (on average 1.0046728971962617) internal successors, (215), 214 states have internal predecessors, (215), 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 08:02:01,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 215 states to 215 states and 215 transitions. [2021-11-07 08:02:01,115 INFO L78 Accepts]: Start accepts. Automaton has 215 states and 215 transitions. Word has length 212 [2021-11-07 08:02:01,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:02:01,115 INFO L470 AbstractCegarLoop]: Abstraction has 215 states and 215 transitions. [2021-11-07 08:02:01,115 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 107 states, 107 states have (on average 2.0093457943925235) internal successors, (215), 107 states have internal predecessors, (215), 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 08:02:01,115 INFO L276 IsEmpty]: Start isEmpty. Operand 215 states and 215 transitions. [2021-11-07 08:02:01,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 215 [2021-11-07 08:02:01,117 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:02:01,117 INFO L513 BasicCegarLoop]: trace histogram [104, 104, 1, 1, 1, 1, 1, 1] [2021-11-07 08:02:01,182 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (104)] Forceful destruction successful, exit code 0 [2021-11-07 08:02:01,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2021-11-07 08:02:01,336 INFO L402 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:02:01,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:02:01,336 INFO L85 PathProgramCache]: Analyzing trace with hash -2138807683, now seen corresponding path program 104 times [2021-11-07 08:02:01,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:02:01,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [658916339] [2021-11-07 08:02:01,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:02:01,337 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:02:01,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:05,514 INFO L134 CoverageAnalysis]: Checked inductivity of 10816 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:02:05,514 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:02:05,514 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [658916339] [2021-11-07 08:02:05,515 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [658916339] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:02:05,515 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2146560829] [2021-11-07 08:02:05,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:02:05,515 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:02:05,515 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:02:05,516 INFO L229 MonitoredProcess]: Starting monitored process 105 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:02:05,517 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Waiting until timeout for monitored process [2021-11-07 08:02:09,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:02:09,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:02:09,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 347 conjuncts, 106 conjunts are in the unsatisfiable core [2021-11-07 08:02:09,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:02:10,130 INFO L134 CoverageAnalysis]: Checked inductivity of 10816 backedges. 0 proven. 10816 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:02:10,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2146560829] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:02:10,131 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:02:10,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [107, 107] total 108 [2021-11-07 08:02:10,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793811328] [2021-11-07 08:02:10,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2021-11-07 08:02:10,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:02:10,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2021-11-07 08:02:10,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2021-11-07 08:02:10,134 INFO L87 Difference]: Start difference. First operand 215 states and 215 transitions. Second operand has 108 states, 108 states have (on average 2.009259259259259) internal successors, (217), 108 states have internal predecessors, (217), 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 08:02:10,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:02:10,405 INFO L93 Difference]: Finished difference Result 222 states and 222 transitions. [2021-11-07 08:02:10,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2021-11-07 08:02:10,406 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 108 states have (on average 2.009259259259259) internal successors, (217), 108 states have internal predecessors, (217), 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 214 [2021-11-07 08:02:10,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:02:10,407 INFO L225 Difference]: With dead ends: 222 [2021-11-07 08:02:10,407 INFO L226 Difference]: Without dead ends: 218 [2021-11-07 08:02:10,408 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 320 GetRequests, 214 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 3.9s TimeCoverageRelationStatistics Valid=5778, Invalid=5778, Unknown=0, NotChecked=0, Total=11556 [2021-11-07 08:02:10,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2021-11-07 08:02:10,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 217. [2021-11-07 08:02:10,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 217 states, 216 states have (on average 1.0046296296296295) internal successors, (217), 216 states have internal predecessors, (217), 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 08:02:10,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 217 states to 217 states and 217 transitions. [2021-11-07 08:02:10,411 INFO L78 Accepts]: Start accepts. Automaton has 217 states and 217 transitions. Word has length 214 [2021-11-07 08:02:10,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:02:10,411 INFO L470 AbstractCegarLoop]: Abstraction has 217 states and 217 transitions. [2021-11-07 08:02:10,412 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 108 states have (on average 2.009259259259259) internal successors, (217), 108 states have internal predecessors, (217), 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 08:02:10,412 INFO L276 IsEmpty]: Start isEmpty. Operand 217 states and 217 transitions. [2021-11-07 08:02:10,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 217 [2021-11-07 08:02:10,414 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:02:10,414 INFO L513 BasicCegarLoop]: trace histogram [105, 105, 1, 1, 1, 1, 1, 1] [2021-11-07 08:02:10,451 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (105)] Ended with exit code 0 [2021-11-07 08:02:10,614 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2021-11-07 08:02:10,614 INFO L402 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:02:10,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:02:10,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1948383743, now seen corresponding path program 105 times [2021-11-07 08:02:10,615 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:02:10,615 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1661307467] [2021-11-07 08:02:10,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:02:10,615 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:02:10,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:15,142 INFO L134 CoverageAnalysis]: Checked inductivity of 11025 backedges. 0 proven. 11025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:02:15,142 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:02:15,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1661307467] [2021-11-07 08:02:15,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1661307467] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:02:15,142 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [700247760] [2021-11-07 08:02:15,142 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:02:15,142 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:02:15,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:02:15,143 INFO L229 MonitoredProcess]: Starting monitored process 106 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:02:15,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Waiting until timeout for monitored process [2021-11-07 08:02:19,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 106 check-sat command(s) [2021-11-07 08:02:19,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:02:19,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 107 conjunts are in the unsatisfiable core [2021-11-07 08:02:19,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:02:20,052 INFO L134 CoverageAnalysis]: Checked inductivity of 11025 backedges. 0 proven. 11025 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:02:20,052 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [700247760] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:02:20,052 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:02:20,052 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [108, 108] total 109 [2021-11-07 08:02:20,053 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951294064] [2021-11-07 08:02:20,053 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2021-11-07 08:02:20,053 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:02:20,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2021-11-07 08:02:20,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2021-11-07 08:02:20,055 INFO L87 Difference]: Start difference. First operand 217 states and 217 transitions. Second operand has 109 states, 109 states have (on average 2.0091743119266057) internal successors, (219), 109 states have internal predecessors, (219), 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 08:02:20,363 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:02:20,363 INFO L93 Difference]: Finished difference Result 224 states and 224 transitions. [2021-11-07 08:02:20,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2021-11-07 08:02:20,364 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.0091743119266057) internal successors, (219), 109 states have internal predecessors, (219), 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 216 [2021-11-07 08:02:20,364 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:02:20,364 INFO L225 Difference]: With dead ends: 224 [2021-11-07 08:02:20,364 INFO L226 Difference]: Without dead ends: 220 [2021-11-07 08:02:20,366 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 323 GetRequests, 216 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=5886, Invalid=5886, Unknown=0, NotChecked=0, Total=11772 [2021-11-07 08:02:20,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-11-07 08:02:20,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 219. [2021-11-07 08:02:20,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 219 states, 218 states have (on average 1.0045871559633028) internal successors, (219), 218 states have internal predecessors, (219), 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 08:02:20,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 219 states to 219 states and 219 transitions. [2021-11-07 08:02:20,371 INFO L78 Accepts]: Start accepts. Automaton has 219 states and 219 transitions. Word has length 216 [2021-11-07 08:02:20,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:02:20,371 INFO L470 AbstractCegarLoop]: Abstraction has 219 states and 219 transitions. [2021-11-07 08:02:20,371 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.0091743119266057) internal successors, (219), 109 states have internal predecessors, (219), 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 08:02:20,371 INFO L276 IsEmpty]: Start isEmpty. Operand 219 states and 219 transitions. [2021-11-07 08:02:20,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 219 [2021-11-07 08:02:20,372 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:02:20,372 INFO L513 BasicCegarLoop]: trace histogram [106, 106, 1, 1, 1, 1, 1, 1] [2021-11-07 08:02:20,412 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (106)] Forceful destruction successful, exit code 0 [2021-11-07 08:02:20,572 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,106 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:02:20,573 INFO L402 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:02:20,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:02:20,573 INFO L85 PathProgramCache]: Analyzing trace with hash -155731711, now seen corresponding path program 106 times [2021-11-07 08:02:20,573 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:02:20,573 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453939303] [2021-11-07 08:02:20,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:02:20,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:02:20,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:25,241 INFO L134 CoverageAnalysis]: Checked inductivity of 11236 backedges. 0 proven. 11236 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:02:25,242 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:02:25,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453939303] [2021-11-07 08:02:25,242 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453939303] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:02:25,242 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968739009] [2021-11-07 08:02:25,242 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:02:25,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:02:25,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:02:25,252 INFO L229 MonitoredProcess]: Starting monitored process 107 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:02:25,253 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Waiting until timeout for monitored process [2021-11-07 08:02:29,493 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:02:29,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:02:29,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 353 conjuncts, 108 conjunts are in the unsatisfiable core [2021-11-07 08:02:29,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:02:30,200 INFO L134 CoverageAnalysis]: Checked inductivity of 11236 backedges. 0 proven. 11236 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:02:30,200 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968739009] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:02:30,200 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:02:30,201 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [109, 109] total 110 [2021-11-07 08:02:30,201 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824924546] [2021-11-07 08:02:30,201 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 110 states [2021-11-07 08:02:30,201 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:02:30,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 110 interpolants. [2021-11-07 08:02:30,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2021-11-07 08:02:30,204 INFO L87 Difference]: Start difference. First operand 219 states and 219 transitions. Second operand has 110 states, 110 states have (on average 2.0090909090909093) internal successors, (221), 110 states have internal predecessors, (221), 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 08:02:30,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:02:30,521 INFO L93 Difference]: Finished difference Result 226 states and 226 transitions. [2021-11-07 08:02:30,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-11-07 08:02:30,521 INFO L78 Accepts]: Start accepts. Automaton has has 110 states, 110 states have (on average 2.0090909090909093) internal successors, (221), 110 states have internal predecessors, (221), 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 218 [2021-11-07 08:02:30,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:02:30,522 INFO L225 Difference]: With dead ends: 226 [2021-11-07 08:02:30,522 INFO L226 Difference]: Without dead ends: 222 [2021-11-07 08:02:30,523 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 218 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=5995, Invalid=5995, Unknown=0, NotChecked=0, Total=11990 [2021-11-07 08:02:30,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2021-11-07 08:02:30,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 221. [2021-11-07 08:02:30,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 221 states, 220 states have (on average 1.0045454545454546) internal successors, (221), 220 states have internal predecessors, (221), 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 08:02:30,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 221 states to 221 states and 221 transitions. [2021-11-07 08:02:30,527 INFO L78 Accepts]: Start accepts. Automaton has 221 states and 221 transitions. Word has length 218 [2021-11-07 08:02:30,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:02:30,528 INFO L470 AbstractCegarLoop]: Abstraction has 221 states and 221 transitions. [2021-11-07 08:02:30,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 110 states, 110 states have (on average 2.0090909090909093) internal successors, (221), 110 states have internal predecessors, (221), 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 08:02:30,528 INFO L276 IsEmpty]: Start isEmpty. Operand 221 states and 221 transitions. [2021-11-07 08:02:30,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 221 [2021-11-07 08:02:30,529 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:02:30,529 INFO L513 BasicCegarLoop]: trace histogram [107, 107, 1, 1, 1, 1, 1, 1] [2021-11-07 08:02:30,572 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (107)] Forceful destruction successful, exit code 0 [2021-11-07 08:02:30,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 107 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-11-07 08:02:30,734 INFO L402 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:02:30,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:02:30,734 INFO L85 PathProgramCache]: Analyzing trace with hash 718913411, now seen corresponding path program 107 times [2021-11-07 08:02:30,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:02:30,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790082083] [2021-11-07 08:02:30,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:02:30,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:02:30,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:35,542 INFO L134 CoverageAnalysis]: Checked inductivity of 11449 backedges. 0 proven. 11449 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:02:35,542 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:02:35,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790082083] [2021-11-07 08:02:35,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1790082083] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:02:35,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730802852] [2021-11-07 08:02:35,542 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:02:35,542 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:02:35,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:02:35,543 INFO L229 MonitoredProcess]: Starting monitored process 108 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:02:35,544 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Waiting until timeout for monitored process [2021-11-07 08:02:39,980 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 108 check-sat command(s) [2021-11-07 08:02:39,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:02:39,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 356 conjuncts, 109 conjunts are in the unsatisfiable core [2021-11-07 08:02:39,985 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:02:40,623 INFO L134 CoverageAnalysis]: Checked inductivity of 11449 backedges. 0 proven. 11449 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:02:40,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730802852] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:02:40,624 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:02:40,624 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [110, 110] total 111 [2021-11-07 08:02:40,624 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536947331] [2021-11-07 08:02:40,624 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 111 states [2021-11-07 08:02:40,625 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:02:40,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 111 interpolants. [2021-11-07 08:02:40,628 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2021-11-07 08:02:40,629 INFO L87 Difference]: Start difference. First operand 221 states and 221 transitions. Second operand has 111 states, 111 states have (on average 2.009009009009009) internal successors, (223), 111 states have internal predecessors, (223), 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 08:02:40,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:02:40,960 INFO L93 Difference]: Finished difference Result 228 states and 228 transitions. [2021-11-07 08:02:40,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-11-07 08:02:40,960 INFO L78 Accepts]: Start accepts. Automaton has has 111 states, 111 states have (on average 2.009009009009009) internal successors, (223), 111 states have internal predecessors, (223), 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 220 [2021-11-07 08:02:40,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:02:40,961 INFO L225 Difference]: With dead ends: 228 [2021-11-07 08:02:40,961 INFO L226 Difference]: Without dead ends: 224 [2021-11-07 08:02:40,963 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 329 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=6105, Invalid=6105, Unknown=0, NotChecked=0, Total=12210 [2021-11-07 08:02:40,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2021-11-07 08:02:40,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 223. [2021-11-07 08:02:40,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 223 states, 222 states have (on average 1.0045045045045045) internal successors, (223), 222 states have internal predecessors, (223), 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 08:02:40,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 223 states to 223 states and 223 transitions. [2021-11-07 08:02:40,969 INFO L78 Accepts]: Start accepts. Automaton has 223 states and 223 transitions. Word has length 220 [2021-11-07 08:02:40,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:02:40,969 INFO L470 AbstractCegarLoop]: Abstraction has 223 states and 223 transitions. [2021-11-07 08:02:40,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 111 states, 111 states have (on average 2.009009009009009) internal successors, (223), 111 states have internal predecessors, (223), 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 08:02:40,970 INFO L276 IsEmpty]: Start isEmpty. Operand 223 states and 223 transitions. [2021-11-07 08:02:40,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2021-11-07 08:02:40,971 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:02:40,971 INFO L513 BasicCegarLoop]: trace histogram [108, 108, 1, 1, 1, 1, 1, 1] [2021-11-07 08:02:41,011 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (108)] Ended with exit code 0 [2021-11-07 08:02:41,177 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2021-11-07 08:02:41,178 INFO L402 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:02:41,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:02:41,178 INFO L85 PathProgramCache]: Analyzing trace with hash -560714363, now seen corresponding path program 108 times [2021-11-07 08:02:41,178 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:02:41,178 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400286996] [2021-11-07 08:02:41,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:02:41,179 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:02:41,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:45,961 INFO L134 CoverageAnalysis]: Checked inductivity of 11664 backedges. 0 proven. 11664 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:02:45,961 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:02:45,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400286996] [2021-11-07 08:02:45,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400286996] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:02:45,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [757047513] [2021-11-07 08:02:45,962 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:02:45,962 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:02:45,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:02:45,963 INFO L229 MonitoredProcess]: Starting monitored process 109 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:02:45,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Waiting until timeout for monitored process [2021-11-07 08:02:50,466 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 109 check-sat command(s) [2021-11-07 08:02:50,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:02:50,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 359 conjuncts, 110 conjunts are in the unsatisfiable core [2021-11-07 08:02:50,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:02:51,161 INFO L134 CoverageAnalysis]: Checked inductivity of 11664 backedges. 0 proven. 11664 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:02:51,161 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [757047513] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:02:51,161 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:02:51,161 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [111, 111] total 112 [2021-11-07 08:02:51,162 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769523027] [2021-11-07 08:02:51,162 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2021-11-07 08:02:51,162 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:02:51,164 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2021-11-07 08:02:51,165 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2021-11-07 08:02:51,165 INFO L87 Difference]: Start difference. First operand 223 states and 223 transitions. Second operand has 112 states, 112 states have (on average 2.0089285714285716) internal successors, (225), 112 states have internal predecessors, (225), 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 08:02:51,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:02:51,546 INFO L93 Difference]: Finished difference Result 230 states and 230 transitions. [2021-11-07 08:02:51,547 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 111 states. [2021-11-07 08:02:51,547 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 2.0089285714285716) internal successors, (225), 112 states have internal predecessors, (225), 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 222 [2021-11-07 08:02:51,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:02:51,548 INFO L225 Difference]: With dead ends: 230 [2021-11-07 08:02:51,548 INFO L226 Difference]: Without dead ends: 226 [2021-11-07 08:02:51,548 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 332 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=6216, Invalid=6216, Unknown=0, NotChecked=0, Total=12432 [2021-11-07 08:02:51,549 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2021-11-07 08:02:51,551 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 225. [2021-11-07 08:02:51,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 225 states, 224 states have (on average 1.0044642857142858) internal successors, (225), 224 states have internal predecessors, (225), 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 08:02:51,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 225 states to 225 states and 225 transitions. [2021-11-07 08:02:51,552 INFO L78 Accepts]: Start accepts. Automaton has 225 states and 225 transitions. Word has length 222 [2021-11-07 08:02:51,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:02:51,552 INFO L470 AbstractCegarLoop]: Abstraction has 225 states and 225 transitions. [2021-11-07 08:02:51,552 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 2.0089285714285716) internal successors, (225), 112 states have internal predecessors, (225), 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 08:02:51,552 INFO L276 IsEmpty]: Start isEmpty. Operand 225 states and 225 transitions. [2021-11-07 08:02:51,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2021-11-07 08:02:51,553 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:02:51,553 INFO L513 BasicCegarLoop]: trace histogram [109, 109, 1, 1, 1, 1, 1, 1] [2021-11-07 08:02:51,594 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (109)] Forceful destruction successful, exit code 0 [2021-11-07 08:02:51,757 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,109 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:02:51,758 INFO L402 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:02:51,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:02:51,758 INFO L85 PathProgramCache]: Analyzing trace with hash -1922358521, now seen corresponding path program 109 times [2021-11-07 08:02:51,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:02:51,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846804314] [2021-11-07 08:02:51,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:02:51,759 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:02:51,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:02:56,569 INFO L134 CoverageAnalysis]: Checked inductivity of 11881 backedges. 0 proven. 11881 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:02:56,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:02:56,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846804314] [2021-11-07 08:02:56,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846804314] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:02:56,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598023089] [2021-11-07 08:02:56,569 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:02:56,569 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:02:56,570 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:02:56,570 INFO L229 MonitoredProcess]: Starting monitored process 110 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:02:56,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Waiting until timeout for monitored process [2021-11-07 08:03:01,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:01,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 362 conjuncts, 111 conjunts are in the unsatisfiable core [2021-11-07 08:03:01,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:03:01,813 INFO L134 CoverageAnalysis]: Checked inductivity of 11881 backedges. 0 proven. 11881 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:03:01,813 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1598023089] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:01,813 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:03:01,813 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [112, 112] total 113 [2021-11-07 08:03:01,813 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961520002] [2021-11-07 08:03:01,814 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2021-11-07 08:03:01,814 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:03:01,815 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2021-11-07 08:03:01,817 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2021-11-07 08:03:01,817 INFO L87 Difference]: Start difference. First operand 225 states and 225 transitions. Second operand has 113 states, 113 states have (on average 2.0088495575221237) internal successors, (227), 113 states have internal predecessors, (227), 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 08:03:02,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:03:02,139 INFO L93 Difference]: Finished difference Result 232 states and 232 transitions. [2021-11-07 08:03:02,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2021-11-07 08:03:02,140 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 113 states have (on average 2.0088495575221237) internal successors, (227), 113 states have internal predecessors, (227), 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 224 [2021-11-07 08:03:02,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:03:02,141 INFO L225 Difference]: With dead ends: 232 [2021-11-07 08:03:02,141 INFO L226 Difference]: Without dead ends: 228 [2021-11-07 08:03:02,143 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 224 SyntacticMatches, 0 SemanticMatches, 111 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=6328, Invalid=6328, Unknown=0, NotChecked=0, Total=12656 [2021-11-07 08:03:02,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2021-11-07 08:03:02,146 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 227. [2021-11-07 08:03:02,146 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 227 states, 226 states have (on average 1.0044247787610618) internal successors, (227), 226 states have internal predecessors, (227), 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 08:03:02,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 227 states to 227 states and 227 transitions. [2021-11-07 08:03:02,147 INFO L78 Accepts]: Start accepts. Automaton has 227 states and 227 transitions. Word has length 224 [2021-11-07 08:03:02,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:03:02,147 INFO L470 AbstractCegarLoop]: Abstraction has 227 states and 227 transitions. [2021-11-07 08:03:02,147 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 113 states have (on average 2.0088495575221237) internal successors, (227), 113 states have internal predecessors, (227), 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 08:03:02,147 INFO L276 IsEmpty]: Start isEmpty. Operand 227 states and 227 transitions. [2021-11-07 08:03:02,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 227 [2021-11-07 08:03:02,148 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:03:02,148 INFO L513 BasicCegarLoop]: trace histogram [110, 110, 1, 1, 1, 1, 1, 1] [2021-11-07 08:03:02,187 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (110)] Ended with exit code 0 [2021-11-07 08:03:02,349 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2021-11-07 08:03:02,349 INFO L402 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:03:02,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:03:02,349 INFO L85 PathProgramCache]: Analyzing trace with hash -497369079, now seen corresponding path program 110 times [2021-11-07 08:03:02,350 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:03:02,350 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137620201] [2021-11-07 08:03:02,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:03:02,350 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:03:02,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:07,376 INFO L134 CoverageAnalysis]: Checked inductivity of 12100 backedges. 0 proven. 12100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:03:07,376 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:03:07,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137620201] [2021-11-07 08:03:07,376 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137620201] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:07,376 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730503429] [2021-11-07 08:03:07,376 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:03:07,376 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:03:07,377 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:03:07,377 INFO L229 MonitoredProcess]: Starting monitored process 111 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:03:07,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Waiting until timeout for monitored process [2021-11-07 08:03:12,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:03:12,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:03:12,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 112 conjunts are in the unsatisfiable core [2021-11-07 08:03:12,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:03:12,683 INFO L134 CoverageAnalysis]: Checked inductivity of 12100 backedges. 0 proven. 12100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:03:12,683 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1730503429] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:12,684 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:03:12,684 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [113, 113] total 114 [2021-11-07 08:03:12,684 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1552804411] [2021-11-07 08:03:12,684 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 114 states [2021-11-07 08:03:12,684 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:03:12,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 114 interpolants. [2021-11-07 08:03:12,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6441, Invalid=6441, Unknown=0, NotChecked=0, Total=12882 [2021-11-07 08:03:12,686 INFO L87 Difference]: Start difference. First operand 227 states and 227 transitions. Second operand has 114 states, 114 states have (on average 2.008771929824561) internal successors, (229), 114 states have internal predecessors, (229), 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 08:03:12,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:03:12,987 INFO L93 Difference]: Finished difference Result 234 states and 234 transitions. [2021-11-07 08:03:12,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2021-11-07 08:03:12,987 INFO L78 Accepts]: Start accepts. Automaton has has 114 states, 114 states have (on average 2.008771929824561) internal successors, (229), 114 states have internal predecessors, (229), 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 226 [2021-11-07 08:03:12,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:03:12,988 INFO L225 Difference]: With dead ends: 234 [2021-11-07 08:03:12,988 INFO L226 Difference]: Without dead ends: 230 [2021-11-07 08:03:12,989 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 226 SyntacticMatches, 0 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=6441, Invalid=6441, Unknown=0, NotChecked=0, Total=12882 [2021-11-07 08:03:12,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2021-11-07 08:03:12,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 229. [2021-11-07 08:03:12,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 229 states, 228 states have (on average 1.0043859649122806) internal successors, (229), 228 states have internal predecessors, (229), 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 08:03:12,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 229 states to 229 states and 229 transitions. [2021-11-07 08:03:12,992 INFO L78 Accepts]: Start accepts. Automaton has 229 states and 229 transitions. Word has length 226 [2021-11-07 08:03:12,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:03:12,992 INFO L470 AbstractCegarLoop]: Abstraction has 229 states and 229 transitions. [2021-11-07 08:03:12,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 114 states, 114 states have (on average 2.008771929824561) internal successors, (229), 114 states have internal predecessors, (229), 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 08:03:12,993 INFO L276 IsEmpty]: Start isEmpty. Operand 229 states and 229 transitions. [2021-11-07 08:03:12,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 229 [2021-11-07 08:03:12,993 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:03:12,993 INFO L513 BasicCegarLoop]: trace histogram [111, 111, 1, 1, 1, 1, 1, 1] [2021-11-07 08:03:13,032 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (111)] Ended with exit code 0 [2021-11-07 08:03:13,194 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,111 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:03:13,194 INFO L402 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:03:13,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:03:13,195 INFO L85 PathProgramCache]: Analyzing trace with hash -1177082741, now seen corresponding path program 111 times [2021-11-07 08:03:13,195 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:03:13,195 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [890338434] [2021-11-07 08:03:13,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:03:13,195 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:03:13,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:18,254 INFO L134 CoverageAnalysis]: Checked inductivity of 12321 backedges. 0 proven. 12321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:03:18,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:03:18,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [890338434] [2021-11-07 08:03:18,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [890338434] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:18,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373968590] [2021-11-07 08:03:18,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:03:18,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:03:18,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:03:18,256 INFO L229 MonitoredProcess]: Starting monitored process 112 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:03:18,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Waiting until timeout for monitored process [2021-11-07 08:03:23,005 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 112 check-sat command(s) [2021-11-07 08:03:23,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:03:23,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 368 conjuncts, 113 conjunts are in the unsatisfiable core [2021-11-07 08:03:23,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:03:23,717 INFO L134 CoverageAnalysis]: Checked inductivity of 12321 backedges. 0 proven. 12321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:03:23,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373968590] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:23,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:03:23,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [114, 114] total 115 [2021-11-07 08:03:23,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504230721] [2021-11-07 08:03:23,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2021-11-07 08:03:23,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:03:23,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2021-11-07 08:03:23,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6555, Invalid=6555, Unknown=0, NotChecked=0, Total=13110 [2021-11-07 08:03:23,722 INFO L87 Difference]: Start difference. First operand 229 states and 229 transitions. Second operand has 115 states, 115 states have (on average 2.008695652173913) internal successors, (231), 115 states have internal predecessors, (231), 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 08:03:24,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:03:24,059 INFO L93 Difference]: Finished difference Result 236 states and 236 transitions. [2021-11-07 08:03:24,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 114 states. [2021-11-07 08:03:24,060 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.008695652173913) internal successors, (231), 115 states have internal predecessors, (231), 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 228 [2021-11-07 08:03:24,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:03:24,060 INFO L225 Difference]: With dead ends: 236 [2021-11-07 08:03:24,061 INFO L226 Difference]: Without dead ends: 232 [2021-11-07 08:03:24,062 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 4.7s TimeCoverageRelationStatistics Valid=6555, Invalid=6555, Unknown=0, NotChecked=0, Total=13110 [2021-11-07 08:03:24,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2021-11-07 08:03:24,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 231. [2021-11-07 08:03:24,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 1.0043478260869565) internal successors, (231), 230 states have internal predecessors, (231), 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 08:03:24,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 231 transitions. [2021-11-07 08:03:24,065 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 231 transitions. Word has length 228 [2021-11-07 08:03:24,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:03:24,066 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 231 transitions. [2021-11-07 08:03:24,066 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 2.008695652173913) internal successors, (231), 115 states have internal predecessors, (231), 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 08:03:24,066 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 231 transitions. [2021-11-07 08:03:24,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 231 [2021-11-07 08:03:24,067 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:03:24,067 INFO L513 BasicCegarLoop]: trace histogram [112, 112, 1, 1, 1, 1, 1, 1] [2021-11-07 08:03:24,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (112)] Forceful destruction successful, exit code 0 [2021-11-07 08:03:24,267 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,112 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:03:24,267 INFO L402 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:03:24,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:03:24,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1546882931, now seen corresponding path program 112 times [2021-11-07 08:03:24,268 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:03:24,268 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657352314] [2021-11-07 08:03:24,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:03:24,268 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:03:24,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:29,399 INFO L134 CoverageAnalysis]: Checked inductivity of 12544 backedges. 0 proven. 12544 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:03:29,399 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:03:29,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657352314] [2021-11-07 08:03:29,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1657352314] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:29,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [27035928] [2021-11-07 08:03:29,399 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:03:29,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:03:29,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:03:29,400 INFO L229 MonitoredProcess]: Starting monitored process 113 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:03:29,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Waiting until timeout for monitored process [2021-11-07 08:03:34,052 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:03:34,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:03:34,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 114 conjunts are in the unsatisfiable core [2021-11-07 08:03:34,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:03:34,749 INFO L134 CoverageAnalysis]: Checked inductivity of 12544 backedges. 0 proven. 12544 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:03:34,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [27035928] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:34,749 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:03:34,749 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [115, 115] total 116 [2021-11-07 08:03:34,749 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110977118] [2021-11-07 08:03:34,750 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 116 states [2021-11-07 08:03:34,750 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:03:34,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 116 interpolants. [2021-11-07 08:03:34,752 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6670, Invalid=6670, Unknown=0, NotChecked=0, Total=13340 [2021-11-07 08:03:34,753 INFO L87 Difference]: Start difference. First operand 231 states and 231 transitions. Second operand has 116 states, 116 states have (on average 2.0086206896551726) internal successors, (233), 116 states have internal predecessors, (233), 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 08:03:35,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:03:35,108 INFO L93 Difference]: Finished difference Result 238 states and 238 transitions. [2021-11-07 08:03:35,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 115 states. [2021-11-07 08:03:35,108 INFO L78 Accepts]: Start accepts. Automaton has has 116 states, 116 states have (on average 2.0086206896551726) internal successors, (233), 116 states have internal predecessors, (233), 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 230 [2021-11-07 08:03:35,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:03:35,109 INFO L225 Difference]: With dead ends: 238 [2021-11-07 08:03:35,109 INFO L226 Difference]: Without dead ends: 234 [2021-11-07 08:03:35,110 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 344 GetRequests, 230 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=6670, Invalid=6670, Unknown=0, NotChecked=0, Total=13340 [2021-11-07 08:03:35,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2021-11-07 08:03:35,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 233. [2021-11-07 08:03:35,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 233 states, 232 states have (on average 1.0043103448275863) internal successors, (233), 232 states have internal predecessors, (233), 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 08:03:35,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 233 states to 233 states and 233 transitions. [2021-11-07 08:03:35,114 INFO L78 Accepts]: Start accepts. Automaton has 233 states and 233 transitions. Word has length 230 [2021-11-07 08:03:35,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:03:35,114 INFO L470 AbstractCegarLoop]: Abstraction has 233 states and 233 transitions. [2021-11-07 08:03:35,114 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 116 states, 116 states have (on average 2.0086206896551726) internal successors, (233), 116 states have internal predecessors, (233), 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 08:03:35,114 INFO L276 IsEmpty]: Start isEmpty. Operand 233 states and 233 transitions. [2021-11-07 08:03:35,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 233 [2021-11-07 08:03:35,115 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:03:35,115 INFO L513 BasicCegarLoop]: trace histogram [113, 113, 1, 1, 1, 1, 1, 1] [2021-11-07 08:03:35,155 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (113)] Ended with exit code 0 [2021-11-07 08:03:35,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,113 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:03:35,316 INFO L402 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:03:35,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:03:35,316 INFO L85 PathProgramCache]: Analyzing trace with hash -442579953, now seen corresponding path program 113 times [2021-11-07 08:03:35,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:03:35,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [54948596] [2021-11-07 08:03:35,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:03:35,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:03:35,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:40,423 INFO L134 CoverageAnalysis]: Checked inductivity of 12769 backedges. 0 proven. 12769 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:03:40,423 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:03:40,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [54948596] [2021-11-07 08:03:40,423 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [54948596] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:40,423 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049186832] [2021-11-07 08:03:40,424 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:03:40,424 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:03:40,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:03:40,425 INFO L229 MonitoredProcess]: Starting monitored process 114 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:03:40,426 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Waiting until timeout for monitored process [2021-11-07 08:03:45,350 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 114 check-sat command(s) [2021-11-07 08:03:45,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:03:45,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 115 conjunts are in the unsatisfiable core [2021-11-07 08:03:45,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:03:46,091 INFO L134 CoverageAnalysis]: Checked inductivity of 12769 backedges. 0 proven. 12769 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:03:46,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2049186832] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:46,091 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:03:46,091 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [116, 116] total 117 [2021-11-07 08:03:46,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454775269] [2021-11-07 08:03:46,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 117 states [2021-11-07 08:03:46,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:03:46,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 117 interpolants. [2021-11-07 08:03:46,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6786, Invalid=6786, Unknown=0, NotChecked=0, Total=13572 [2021-11-07 08:03:46,093 INFO L87 Difference]: Start difference. First operand 233 states and 233 transitions. Second operand has 117 states, 117 states have (on average 2.0085470085470085) internal successors, (235), 117 states have internal predecessors, (235), 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 08:03:46,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:03:46,418 INFO L93 Difference]: Finished difference Result 240 states and 240 transitions. [2021-11-07 08:03:46,419 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-11-07 08:03:46,419 INFO L78 Accepts]: Start accepts. Automaton has has 117 states, 117 states have (on average 2.0085470085470085) internal successors, (235), 117 states have internal predecessors, (235), 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 232 [2021-11-07 08:03:46,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:03:46,420 INFO L225 Difference]: With dead ends: 240 [2021-11-07 08:03:46,420 INFO L226 Difference]: Without dead ends: 236 [2021-11-07 08:03:46,420 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 347 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 4.8s TimeCoverageRelationStatistics Valid=6786, Invalid=6786, Unknown=0, NotChecked=0, Total=13572 [2021-11-07 08:03:46,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 236 states. [2021-11-07 08:03:46,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 236 to 235. [2021-11-07 08:03:46,423 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 235 states, 234 states have (on average 1.0042735042735043) internal successors, (235), 234 states have internal predecessors, (235), 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 08:03:46,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 235 states to 235 states and 235 transitions. [2021-11-07 08:03:46,424 INFO L78 Accepts]: Start accepts. Automaton has 235 states and 235 transitions. Word has length 232 [2021-11-07 08:03:46,424 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:03:46,424 INFO L470 AbstractCegarLoop]: Abstraction has 235 states and 235 transitions. [2021-11-07 08:03:46,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 117 states, 117 states have (on average 2.0085470085470085) internal successors, (235), 117 states have internal predecessors, (235), 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 08:03:46,425 INFO L276 IsEmpty]: Start isEmpty. Operand 235 states and 235 transitions. [2021-11-07 08:03:46,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 235 [2021-11-07 08:03:46,426 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:03:46,426 INFO L513 BasicCegarLoop]: trace histogram [114, 114, 1, 1, 1, 1, 1, 1] [2021-11-07 08:03:46,466 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (114)] Forceful destruction successful, exit code 0 [2021-11-07 08:03:46,626 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-11-07 08:03:46,626 INFO L402 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:03:46,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:03:46,627 INFO L85 PathProgramCache]: Analyzing trace with hash -64340207, now seen corresponding path program 114 times [2021-11-07 08:03:46,627 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:03:46,627 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1323800614] [2021-11-07 08:03:46,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:03:46,627 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:03:46,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:03:51,954 INFO L134 CoverageAnalysis]: Checked inductivity of 12996 backedges. 0 proven. 12996 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:03:51,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:03:51,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1323800614] [2021-11-07 08:03:51,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1323800614] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:51,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2046837757] [2021-11-07 08:03:51,955 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:03:51,955 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:03:51,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:03:51,956 INFO L229 MonitoredProcess]: Starting monitored process 115 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:03:51,957 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Waiting until timeout for monitored process [2021-11-07 08:03:56,836 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 115 check-sat command(s) [2021-11-07 08:03:56,836 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:03:56,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 377 conjuncts, 116 conjunts are in the unsatisfiable core [2021-11-07 08:03:56,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:03:57,621 INFO L134 CoverageAnalysis]: Checked inductivity of 12996 backedges. 0 proven. 12996 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:03:57,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2046837757] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:03:57,621 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:03:57,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [117, 117] total 118 [2021-11-07 08:03:57,622 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227869659] [2021-11-07 08:03:57,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2021-11-07 08:03:57,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:03:57,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2021-11-07 08:03:57,625 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6903, Invalid=6903, Unknown=0, NotChecked=0, Total=13806 [2021-11-07 08:03:57,625 INFO L87 Difference]: Start difference. First operand 235 states and 235 transitions. Second operand has 118 states, 118 states have (on average 2.0084745762711864) internal successors, (237), 118 states have internal predecessors, (237), 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 08:03:57,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:03:57,968 INFO L93 Difference]: Finished difference Result 242 states and 242 transitions. [2021-11-07 08:03:57,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 117 states. [2021-11-07 08:03:57,969 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 2.0084745762711864) internal successors, (237), 118 states have internal predecessors, (237), 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 234 [2021-11-07 08:03:57,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:03:57,970 INFO L225 Difference]: With dead ends: 242 [2021-11-07 08:03:57,970 INFO L226 Difference]: Without dead ends: 238 [2021-11-07 08:03:57,971 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 350 GetRequests, 234 SyntacticMatches, 0 SemanticMatches, 116 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=6903, Invalid=6903, Unknown=0, NotChecked=0, Total=13806 [2021-11-07 08:03:57,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-11-07 08:03:57,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 237. [2021-11-07 08:03:57,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 237 states, 236 states have (on average 1.0042372881355932) internal successors, (237), 236 states have internal predecessors, (237), 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 08:03:57,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 237 states to 237 states and 237 transitions. [2021-11-07 08:03:57,974 INFO L78 Accepts]: Start accepts. Automaton has 237 states and 237 transitions. Word has length 234 [2021-11-07 08:03:57,975 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:03:57,975 INFO L470 AbstractCegarLoop]: Abstraction has 237 states and 237 transitions. [2021-11-07 08:03:57,975 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 2.0084745762711864) internal successors, (237), 118 states have internal predecessors, (237), 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 08:03:57,975 INFO L276 IsEmpty]: Start isEmpty. Operand 237 states and 237 transitions. [2021-11-07 08:03:57,976 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2021-11-07 08:03:57,976 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:03:57,976 INFO L513 BasicCegarLoop]: trace histogram [115, 115, 1, 1, 1, 1, 1, 1] [2021-11-07 08:03:58,020 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (115)] Ended with exit code 0 [2021-11-07 08:03:58,185 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 115 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2021-11-07 08:03:58,186 INFO L402 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:03:58,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:03:58,186 INFO L85 PathProgramCache]: Analyzing trace with hash -1648164461, now seen corresponding path program 115 times [2021-11-07 08:03:58,186 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:03:58,186 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142936141] [2021-11-07 08:03:58,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:03:58,186 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:03:58,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:03,585 INFO L134 CoverageAnalysis]: Checked inductivity of 13225 backedges. 0 proven. 13225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:04:03,585 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:03,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142936141] [2021-11-07 08:04:03,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142936141] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:04:03,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223643569] [2021-11-07 08:04:03,586 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:04:03,586 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:04:03,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:04:03,587 INFO L229 MonitoredProcess]: Starting monitored process 116 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:04:03,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Waiting until timeout for monitored process [2021-11-07 08:04:08,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:08,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 117 conjunts are in the unsatisfiable core [2021-11-07 08:04:08,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:04:09,217 INFO L134 CoverageAnalysis]: Checked inductivity of 13225 backedges. 0 proven. 13225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:04:09,217 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1223643569] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:04:09,217 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:04:09,217 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [118, 118] total 119 [2021-11-07 08:04:09,217 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250257402] [2021-11-07 08:04:09,218 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2021-11-07 08:04:09,218 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:09,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2021-11-07 08:04:09,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7021, Invalid=7021, Unknown=0, NotChecked=0, Total=14042 [2021-11-07 08:04:09,221 INFO L87 Difference]: Start difference. First operand 237 states and 237 transitions. Second operand has 119 states, 119 states have (on average 2.008403361344538) internal successors, (239), 119 states have internal predecessors, (239), 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 08:04:09,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:04:09,586 INFO L93 Difference]: Finished difference Result 244 states and 244 transitions. [2021-11-07 08:04:09,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2021-11-07 08:04:09,586 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 119 states have (on average 2.008403361344538) internal successors, (239), 119 states have internal predecessors, (239), 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 236 [2021-11-07 08:04:09,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:04:09,587 INFO L225 Difference]: With dead ends: 244 [2021-11-07 08:04:09,587 INFO L226 Difference]: Without dead ends: 240 [2021-11-07 08:04:09,588 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 353 GetRequests, 236 SyntacticMatches, 0 SemanticMatches, 117 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=7021, Invalid=7021, Unknown=0, NotChecked=0, Total=14042 [2021-11-07 08:04:09,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-11-07 08:04:09,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 239. [2021-11-07 08:04:09,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 238 states have (on average 1.004201680672269) internal successors, (239), 238 states have internal predecessors, (239), 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 08:04:09,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 239 transitions. [2021-11-07 08:04:09,592 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 239 transitions. Word has length 236 [2021-11-07 08:04:09,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:04:09,592 INFO L470 AbstractCegarLoop]: Abstraction has 239 states and 239 transitions. [2021-11-07 08:04:09,592 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 119 states have (on average 2.008403361344538) internal successors, (239), 119 states have internal predecessors, (239), 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 08:04:09,592 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 239 transitions. [2021-11-07 08:04:09,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2021-11-07 08:04:09,593 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:09,593 INFO L513 BasicCegarLoop]: trace histogram [116, 116, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:09,633 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (116)] Ended with exit code 0 [2021-11-07 08:04:09,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,116 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:04:09,794 INFO L402 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:04:09,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:09,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1010117525, now seen corresponding path program 116 times [2021-11-07 08:04:09,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:09,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678937503] [2021-11-07 08:04:09,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:09,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:09,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:15,396 INFO L134 CoverageAnalysis]: Checked inductivity of 13456 backedges. 0 proven. 13456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:04:15,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:15,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678937503] [2021-11-07 08:04:15,397 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678937503] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:04:15,397 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446300126] [2021-11-07 08:04:15,397 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:04:15,397 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:04:15,397 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:04:15,398 INFO L229 MonitoredProcess]: Starting monitored process 117 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:04:15,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Waiting until timeout for monitored process [2021-11-07 08:04:20,594 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:04:20,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:04:20,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 383 conjuncts, 118 conjunts are in the unsatisfiable core [2021-11-07 08:04:20,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:04:21,310 INFO L134 CoverageAnalysis]: Checked inductivity of 13456 backedges. 0 proven. 13456 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:04:21,311 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446300126] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:04:21,311 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:04:21,311 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [119, 119] total 120 [2021-11-07 08:04:21,311 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88126832] [2021-11-07 08:04:21,312 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2021-11-07 08:04:21,312 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:21,314 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2021-11-07 08:04:21,314 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7140, Invalid=7140, Unknown=0, NotChecked=0, Total=14280 [2021-11-07 08:04:21,315 INFO L87 Difference]: Start difference. First operand 239 states and 239 transitions. Second operand has 120 states, 120 states have (on average 2.0083333333333333) internal successors, (241), 120 states have internal predecessors, (241), 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 08:04:21,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:04:21,691 INFO L93 Difference]: Finished difference Result 246 states and 246 transitions. [2021-11-07 08:04:21,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 119 states. [2021-11-07 08:04:21,692 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 120 states have (on average 2.0083333333333333) internal successors, (241), 120 states have internal predecessors, (241), 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 238 [2021-11-07 08:04:21,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:04:21,693 INFO L225 Difference]: With dead ends: 246 [2021-11-07 08:04:21,693 INFO L226 Difference]: Without dead ends: 242 [2021-11-07 08:04:21,694 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 238 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=7140, Invalid=7140, Unknown=0, NotChecked=0, Total=14280 [2021-11-07 08:04:21,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 242 states. [2021-11-07 08:04:21,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 242 to 241. [2021-11-07 08:04:21,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 240 states have (on average 1.0041666666666667) internal successors, (241), 240 states have internal predecessors, (241), 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 08:04:21,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 241 transitions. [2021-11-07 08:04:21,697 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 241 transitions. Word has length 238 [2021-11-07 08:04:21,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:04:21,698 INFO L470 AbstractCegarLoop]: Abstraction has 241 states and 241 transitions. [2021-11-07 08:04:21,698 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 120 states have (on average 2.0083333333333333) internal successors, (241), 120 states have internal predecessors, (241), 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 08:04:21,698 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 241 transitions. [2021-11-07 08:04:21,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 241 [2021-11-07 08:04:21,699 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:21,699 INFO L513 BasicCegarLoop]: trace histogram [117, 117, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:21,743 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (117)] Ended with exit code 0 [2021-11-07 08:04:21,899 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 117 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2021-11-07 08:04:21,900 INFO L402 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:04:21,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:21,900 INFO L85 PathProgramCache]: Analyzing trace with hash 113564951, now seen corresponding path program 117 times [2021-11-07 08:04:21,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:21,900 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [414091115] [2021-11-07 08:04:21,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:21,901 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:21,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:27,614 INFO L134 CoverageAnalysis]: Checked inductivity of 13689 backedges. 0 proven. 13689 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:04:27,614 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:27,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [414091115] [2021-11-07 08:04:27,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [414091115] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:04:27,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2033774478] [2021-11-07 08:04:27,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:04:27,614 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:04:27,615 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:04:27,615 INFO L229 MonitoredProcess]: Starting monitored process 118 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:04:27,616 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Waiting until timeout for monitored process [2021-11-07 08:04:32,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 118 check-sat command(s) [2021-11-07 08:04:32,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:04:32,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 386 conjuncts, 119 conjunts are in the unsatisfiable core [2021-11-07 08:04:32,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:04:33,730 INFO L134 CoverageAnalysis]: Checked inductivity of 13689 backedges. 0 proven. 13689 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:04:33,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2033774478] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:04:33,731 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:04:33,731 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [120, 120] total 121 [2021-11-07 08:04:33,731 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1631445595] [2021-11-07 08:04:33,731 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2021-11-07 08:04:33,731 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:33,733 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2021-11-07 08:04:33,734 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7260, Invalid=7260, Unknown=0, NotChecked=0, Total=14520 [2021-11-07 08:04:33,735 INFO L87 Difference]: Start difference. First operand 241 states and 241 transitions. Second operand has 121 states, 121 states have (on average 2.0082644628099175) internal successors, (243), 121 states have internal predecessors, (243), 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 08:04:34,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:04:34,087 INFO L93 Difference]: Finished difference Result 248 states and 248 transitions. [2021-11-07 08:04:34,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2021-11-07 08:04:34,087 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 121 states have (on average 2.0082644628099175) internal successors, (243), 121 states have internal predecessors, (243), 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 240 [2021-11-07 08:04:34,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:04:34,088 INFO L225 Difference]: With dead ends: 248 [2021-11-07 08:04:34,088 INFO L226 Difference]: Without dead ends: 244 [2021-11-07 08:04:34,090 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=7260, Invalid=7260, Unknown=0, NotChecked=0, Total=14520 [2021-11-07 08:04:34,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2021-11-07 08:04:34,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 243. [2021-11-07 08:04:34,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 242 states have (on average 1.0041322314049588) internal successors, (243), 242 states have internal predecessors, (243), 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 08:04:34,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 243 transitions. [2021-11-07 08:04:34,093 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 243 transitions. Word has length 240 [2021-11-07 08:04:34,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:04:34,095 INFO L470 AbstractCegarLoop]: Abstraction has 243 states and 243 transitions. [2021-11-07 08:04:34,095 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 121 states have (on average 2.0082644628099175) internal successors, (243), 121 states have internal predecessors, (243), 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 08:04:34,095 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 243 transitions. [2021-11-07 08:04:34,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 243 [2021-11-07 08:04:34,096 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:34,096 INFO L513 BasicCegarLoop]: trace histogram [118, 118, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:34,139 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (118)] Forceful destruction successful, exit code 0 [2021-11-07 08:04:34,297 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,118 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:04:34,297 INFO L402 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:04:34,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:34,297 INFO L85 PathProgramCache]: Analyzing trace with hash 1814967833, now seen corresponding path program 118 times [2021-11-07 08:04:34,297 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:34,298 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64632822] [2021-11-07 08:04:34,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:34,298 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:34,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:40,221 INFO L134 CoverageAnalysis]: Checked inductivity of 13924 backedges. 0 proven. 13924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:04:40,222 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:40,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64632822] [2021-11-07 08:04:40,222 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64632822] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:04:40,222 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891043334] [2021-11-07 08:04:40,222 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:04:40,222 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:04:40,222 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:04:40,223 INFO L229 MonitoredProcess]: Starting monitored process 119 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:04:40,224 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Waiting until timeout for monitored process [2021-11-07 08:04:45,497 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:04:45,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:04:45,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 389 conjuncts, 120 conjunts are in the unsatisfiable core [2021-11-07 08:04:45,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:04:46,248 INFO L134 CoverageAnalysis]: Checked inductivity of 13924 backedges. 0 proven. 13924 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:04:46,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891043334] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:04:46,248 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:04:46,248 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [121, 121] total 122 [2021-11-07 08:04:46,249 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534147973] [2021-11-07 08:04:46,249 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 122 states [2021-11-07 08:04:46,249 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:46,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 122 interpolants. [2021-11-07 08:04:46,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7381, Invalid=7381, Unknown=0, NotChecked=0, Total=14762 [2021-11-07 08:04:46,252 INFO L87 Difference]: Start difference. First operand 243 states and 243 transitions. Second operand has 122 states, 122 states have (on average 2.0081967213114753) internal successors, (245), 122 states have internal predecessors, (245), 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 08:04:46,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:04:46,615 INFO L93 Difference]: Finished difference Result 250 states and 250 transitions. [2021-11-07 08:04:46,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 121 states. [2021-11-07 08:04:46,616 INFO L78 Accepts]: Start accepts. Automaton has has 122 states, 122 states have (on average 2.0081967213114753) internal successors, (245), 122 states have internal predecessors, (245), 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 242 [2021-11-07 08:04:46,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:04:46,617 INFO L225 Difference]: With dead ends: 250 [2021-11-07 08:04:46,617 INFO L226 Difference]: Without dead ends: 246 [2021-11-07 08:04:46,618 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 362 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 120 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=7381, Invalid=7381, Unknown=0, NotChecked=0, Total=14762 [2021-11-07 08:04:46,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2021-11-07 08:04:46,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 245. [2021-11-07 08:04:46,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 245 states, 244 states have (on average 1.0040983606557377) internal successors, (245), 244 states have internal predecessors, (245), 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 08:04:46,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 245 states to 245 states and 245 transitions. [2021-11-07 08:04:46,622 INFO L78 Accepts]: Start accepts. Automaton has 245 states and 245 transitions. Word has length 242 [2021-11-07 08:04:46,622 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:04:46,622 INFO L470 AbstractCegarLoop]: Abstraction has 245 states and 245 transitions. [2021-11-07 08:04:46,622 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 122 states, 122 states have (on average 2.0081967213114753) internal successors, (245), 122 states have internal predecessors, (245), 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 08:04:46,622 INFO L276 IsEmpty]: Start isEmpty. Operand 245 states and 245 transitions. [2021-11-07 08:04:46,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 245 [2021-11-07 08:04:46,623 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:46,623 INFO L513 BasicCegarLoop]: trace histogram [119, 119, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:46,665 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (119)] Ended with exit code 0 [2021-11-07 08:04:46,824 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2021-11-07 08:04:46,824 INFO L402 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:04:46,824 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:46,824 INFO L85 PathProgramCache]: Analyzing trace with hash 480597659, now seen corresponding path program 119 times [2021-11-07 08:04:46,824 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:46,825 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [119971472] [2021-11-07 08:04:46,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:46,825 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:46,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:04:52,664 INFO L134 CoverageAnalysis]: Checked inductivity of 14161 backedges. 0 proven. 14161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:04:52,665 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:04:52,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [119971472] [2021-11-07 08:04:52,665 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [119971472] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:04:52,665 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [547993028] [2021-11-07 08:04:52,665 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:04:52,665 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:04:52,665 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:04:52,666 INFO L229 MonitoredProcess]: Starting monitored process 120 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:04:52,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Waiting until timeout for monitored process [2021-11-07 08:04:58,117 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 120 check-sat command(s) [2021-11-07 08:04:58,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:04:58,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 121 conjunts are in the unsatisfiable core [2021-11-07 08:04:58,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:04:58,836 INFO L134 CoverageAnalysis]: Checked inductivity of 14161 backedges. 0 proven. 14161 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:04:58,836 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [547993028] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:04:58,836 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:04:58,836 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [122, 122] total 123 [2021-11-07 08:04:58,836 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [323773463] [2021-11-07 08:04:58,837 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 123 states [2021-11-07 08:04:58,837 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:04:58,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 123 interpolants. [2021-11-07 08:04:58,839 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7503, Invalid=7503, Unknown=0, NotChecked=0, Total=15006 [2021-11-07 08:04:58,839 INFO L87 Difference]: Start difference. First operand 245 states and 245 transitions. Second operand has 123 states, 123 states have (on average 2.008130081300813) internal successors, (247), 123 states have internal predecessors, (247), 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 08:04:59,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:04:59,197 INFO L93 Difference]: Finished difference Result 252 states and 252 transitions. [2021-11-07 08:04:59,197 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 122 states. [2021-11-07 08:04:59,197 INFO L78 Accepts]: Start accepts. Automaton has has 123 states, 123 states have (on average 2.008130081300813) internal successors, (247), 123 states have internal predecessors, (247), 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 244 [2021-11-07 08:04:59,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:04:59,198 INFO L225 Difference]: With dead ends: 252 [2021-11-07 08:04:59,198 INFO L226 Difference]: Without dead ends: 248 [2021-11-07 08:04:59,199 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 365 GetRequests, 244 SyntacticMatches, 0 SemanticMatches, 121 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=7503, Invalid=7503, Unknown=0, NotChecked=0, Total=15006 [2021-11-07 08:04:59,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2021-11-07 08:04:59,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 247. [2021-11-07 08:04:59,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 247 states, 246 states have (on average 1.0040650406504066) internal successors, (247), 246 states have internal predecessors, (247), 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 08:04:59,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 247 states to 247 states and 247 transitions. [2021-11-07 08:04:59,203 INFO L78 Accepts]: Start accepts. Automaton has 247 states and 247 transitions. Word has length 244 [2021-11-07 08:04:59,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:04:59,203 INFO L470 AbstractCegarLoop]: Abstraction has 247 states and 247 transitions. [2021-11-07 08:04:59,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 123 states, 123 states have (on average 2.008130081300813) internal successors, (247), 123 states have internal predecessors, (247), 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 08:04:59,203 INFO L276 IsEmpty]: Start isEmpty. Operand 247 states and 247 transitions. [2021-11-07 08:04:59,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 247 [2021-11-07 08:04:59,204 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:04:59,204 INFO L513 BasicCegarLoop]: trace histogram [120, 120, 1, 1, 1, 1, 1, 1] [2021-11-07 08:04:59,246 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (120)] Ended with exit code 0 [2021-11-07 08:04:59,404 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable119 [2021-11-07 08:04:59,405 INFO L402 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:04:59,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:04:59,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1948885347, now seen corresponding path program 120 times [2021-11-07 08:04:59,405 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:04:59,405 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [604082433] [2021-11-07 08:04:59,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:04:59,406 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:04:59,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:05,455 INFO L134 CoverageAnalysis]: Checked inductivity of 14400 backedges. 0 proven. 14400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:05:05,455 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:05:05,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [604082433] [2021-11-07 08:05:05,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [604082433] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:05:05,456 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1357510358] [2021-11-07 08:05:05,456 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:05:05,456 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:05:05,456 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:05:05,457 INFO L229 MonitoredProcess]: Starting monitored process 121 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:05:05,458 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Waiting until timeout for monitored process [2021-11-07 08:05:11,147 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 121 check-sat command(s) [2021-11-07 08:05:11,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:05:11,152 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 122 conjunts are in the unsatisfiable core [2021-11-07 08:05:11,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:05:11,896 INFO L134 CoverageAnalysis]: Checked inductivity of 14400 backedges. 0 proven. 14400 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:05:11,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1357510358] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:05:11,896 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:05:11,896 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [123, 123] total 124 [2021-11-07 08:05:11,896 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081813055] [2021-11-07 08:05:11,897 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2021-11-07 08:05:11,897 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:05:11,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2021-11-07 08:05:11,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7626, Invalid=7626, Unknown=0, NotChecked=0, Total=15252 [2021-11-07 08:05:11,900 INFO L87 Difference]: Start difference. First operand 247 states and 247 transitions. Second operand has 124 states, 124 states have (on average 2.0080645161290325) internal successors, (249), 124 states have internal predecessors, (249), 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 08:05:12,278 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:05:12,278 INFO L93 Difference]: Finished difference Result 254 states and 254 transitions. [2021-11-07 08:05:12,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 123 states. [2021-11-07 08:05:12,278 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 2.0080645161290325) internal successors, (249), 124 states have internal predecessors, (249), 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 246 [2021-11-07 08:05:12,279 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:05:12,279 INFO L225 Difference]: With dead ends: 254 [2021-11-07 08:05:12,279 INFO L226 Difference]: Without dead ends: 250 [2021-11-07 08:05:12,281 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 368 GetRequests, 246 SyntacticMatches, 0 SemanticMatches, 122 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=7626, Invalid=7626, Unknown=0, NotChecked=0, Total=15252 [2021-11-07 08:05:12,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2021-11-07 08:05:12,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 249. [2021-11-07 08:05:12,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 249 states, 248 states have (on average 1.0040322580645162) internal successors, (249), 248 states have internal predecessors, (249), 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 08:05:12,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 249 states to 249 states and 249 transitions. [2021-11-07 08:05:12,284 INFO L78 Accepts]: Start accepts. Automaton has 249 states and 249 transitions. Word has length 246 [2021-11-07 08:05:12,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:05:12,285 INFO L470 AbstractCegarLoop]: Abstraction has 249 states and 249 transitions. [2021-11-07 08:05:12,285 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 2.0080645161290325) internal successors, (249), 124 states have internal predecessors, (249), 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 08:05:12,285 INFO L276 IsEmpty]: Start isEmpty. Operand 249 states and 249 transitions. [2021-11-07 08:05:12,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 249 [2021-11-07 08:05:12,286 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:05:12,286 INFO L513 BasicCegarLoop]: trace histogram [121, 121, 1, 1, 1, 1, 1, 1] [2021-11-07 08:05:12,329 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (121)] Ended with exit code 0 [2021-11-07 08:05:12,486 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,121 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:05:12,487 INFO L402 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:05:12,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:05:12,487 INFO L85 PathProgramCache]: Analyzing trace with hash -219845089, now seen corresponding path program 121 times [2021-11-07 08:05:12,487 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:05:12,487 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665233200] [2021-11-07 08:05:12,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:05:12,487 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:05:12,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:18,494 INFO L134 CoverageAnalysis]: Checked inductivity of 14641 backedges. 0 proven. 14641 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:05:18,494 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:05:18,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665233200] [2021-11-07 08:05:18,494 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665233200] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:05:18,494 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506938152] [2021-11-07 08:05:18,494 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:05:18,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:05:18,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:05:18,495 INFO L229 MonitoredProcess]: Starting monitored process 122 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:05:18,497 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Waiting until timeout for monitored process [2021-11-07 08:05:23,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:23,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 123 conjunts are in the unsatisfiable core [2021-11-07 08:05:23,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:05:24,720 INFO L134 CoverageAnalysis]: Checked inductivity of 14641 backedges. 0 proven. 14641 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:05:24,720 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1506938152] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:05:24,720 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:05:24,720 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [124, 124] total 125 [2021-11-07 08:05:24,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296210225] [2021-11-07 08:05:24,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2021-11-07 08:05:24,721 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:05:24,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2021-11-07 08:05:24,724 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7750, Invalid=7750, Unknown=0, NotChecked=0, Total=15500 [2021-11-07 08:05:24,725 INFO L87 Difference]: Start difference. First operand 249 states and 249 transitions. Second operand has 125 states, 125 states have (on average 2.008) internal successors, (251), 125 states have internal predecessors, (251), 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 08:05:25,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:05:25,116 INFO L93 Difference]: Finished difference Result 256 states and 256 transitions. [2021-11-07 08:05:25,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-11-07 08:05:25,117 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 2.008) internal successors, (251), 125 states have internal predecessors, (251), 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 248 [2021-11-07 08:05:25,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:05:25,117 INFO L225 Difference]: With dead ends: 256 [2021-11-07 08:05:25,118 INFO L226 Difference]: Without dead ends: 252 [2021-11-07 08:05:25,119 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 371 GetRequests, 248 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=7750, Invalid=7750, Unknown=0, NotChecked=0, Total=15500 [2021-11-07 08:05:25,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2021-11-07 08:05:25,122 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 251. [2021-11-07 08:05:25,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 251 states, 250 states have (on average 1.004) internal successors, (251), 250 states have internal predecessors, (251), 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 08:05:25,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 251 states to 251 states and 251 transitions. [2021-11-07 08:05:25,123 INFO L78 Accepts]: Start accepts. Automaton has 251 states and 251 transitions. Word has length 248 [2021-11-07 08:05:25,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:05:25,123 INFO L470 AbstractCegarLoop]: Abstraction has 251 states and 251 transitions. [2021-11-07 08:05:25,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 2.008) internal successors, (251), 125 states have internal predecessors, (251), 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 08:05:25,123 INFO L276 IsEmpty]: Start isEmpty. Operand 251 states and 251 transitions. [2021-11-07 08:05:25,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2021-11-07 08:05:25,124 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:05:25,124 INFO L513 BasicCegarLoop]: trace histogram [122, 122, 1, 1, 1, 1, 1, 1] [2021-11-07 08:05:25,166 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (122)] Forceful destruction successful, exit code 0 [2021-11-07 08:05:25,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,122 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:05:25,325 INFO L402 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:05:25,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:05:25,325 INFO L85 PathProgramCache]: Analyzing trace with hash -764500703, now seen corresponding path program 122 times [2021-11-07 08:05:25,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:05:25,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313224266] [2021-11-07 08:05:25,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:05:25,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:05:25,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:31,412 INFO L134 CoverageAnalysis]: Checked inductivity of 14884 backedges. 0 proven. 14884 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:05:31,412 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:05:31,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313224266] [2021-11-07 08:05:31,412 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313224266] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:05:31,412 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396010933] [2021-11-07 08:05:31,412 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-07 08:05:31,413 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:05:31,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:05:31,413 INFO L229 MonitoredProcess]: Starting monitored process 123 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:05:31,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Waiting until timeout for monitored process [2021-11-07 08:05:36,892 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-07 08:05:36,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:05:36,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 401 conjuncts, 124 conjunts are in the unsatisfiable core [2021-11-07 08:05:36,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:05:37,636 INFO L134 CoverageAnalysis]: Checked inductivity of 14884 backedges. 0 proven. 14884 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:05:37,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [396010933] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:05:37,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:05:37,637 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [125, 125] total 126 [2021-11-07 08:05:37,637 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491211742] [2021-11-07 08:05:37,637 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2021-11-07 08:05:37,637 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:05:37,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2021-11-07 08:05:37,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7875, Invalid=7875, Unknown=0, NotChecked=0, Total=15750 [2021-11-07 08:05:37,640 INFO L87 Difference]: Start difference. First operand 251 states and 251 transitions. Second operand has 126 states, 126 states have (on average 2.007936507936508) internal successors, (253), 126 states have internal predecessors, (253), 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 08:05:37,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:05:37,992 INFO L93 Difference]: Finished difference Result 258 states and 258 transitions. [2021-11-07 08:05:37,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2021-11-07 08:05:37,992 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 126 states have (on average 2.007936507936508) internal successors, (253), 126 states have internal predecessors, (253), 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 250 [2021-11-07 08:05:37,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:05:37,993 INFO L225 Difference]: With dead ends: 258 [2021-11-07 08:05:37,993 INFO L226 Difference]: Without dead ends: 254 [2021-11-07 08:05:37,994 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 250 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=7875, Invalid=7875, Unknown=0, NotChecked=0, Total=15750 [2021-11-07 08:05:37,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2021-11-07 08:05:37,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 253. [2021-11-07 08:05:37,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 253 states, 252 states have (on average 1.003968253968254) internal successors, (253), 252 states have internal predecessors, (253), 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 08:05:37,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 253 states to 253 states and 253 transitions. [2021-11-07 08:05:37,998 INFO L78 Accepts]: Start accepts. Automaton has 253 states and 253 transitions. Word has length 250 [2021-11-07 08:05:37,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:05:37,998 INFO L470 AbstractCegarLoop]: Abstraction has 253 states and 253 transitions. [2021-11-07 08:05:37,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 126 states have (on average 2.007936507936508) internal successors, (253), 126 states have internal predecessors, (253), 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 08:05:37,999 INFO L276 IsEmpty]: Start isEmpty. Operand 253 states and 253 transitions. [2021-11-07 08:05:38,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2021-11-07 08:05:38,000 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:05:38,000 INFO L513 BasicCegarLoop]: trace histogram [123, 123, 1, 1, 1, 1, 1, 1] [2021-11-07 08:05:38,043 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (123)] Ended with exit code 0 [2021-11-07 08:05:38,200 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 123 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2021-11-07 08:05:38,201 INFO L402 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:05:38,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:05:38,201 INFO L85 PathProgramCache]: Analyzing trace with hash -192535645, now seen corresponding path program 123 times [2021-11-07 08:05:38,201 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:05:38,201 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110657756] [2021-11-07 08:05:38,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:05:38,201 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:05:38,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:44,395 INFO L134 CoverageAnalysis]: Checked inductivity of 15129 backedges. 0 proven. 15129 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:05:44,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:05:44,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110657756] [2021-11-07 08:05:44,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110657756] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:05:44,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [952610303] [2021-11-07 08:05:44,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-07 08:05:44,396 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:05:44,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:05:44,397 INFO L229 MonitoredProcess]: Starting monitored process 124 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:05:44,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Waiting until timeout for monitored process [2021-11-07 08:05:50,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 124 check-sat command(s) [2021-11-07 08:05:50,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:05:50,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 125 conjunts are in the unsatisfiable core [2021-11-07 08:05:50,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:05:51,091 INFO L134 CoverageAnalysis]: Checked inductivity of 15129 backedges. 0 proven. 15129 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:05:51,091 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [952610303] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:05:51,092 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:05:51,092 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [126, 126] total 127 [2021-11-07 08:05:51,092 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842867224] [2021-11-07 08:05:51,092 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 127 states [2021-11-07 08:05:51,092 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:05:51,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 127 interpolants. [2021-11-07 08:05:51,094 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8001, Invalid=8001, Unknown=0, NotChecked=0, Total=16002 [2021-11-07 08:05:51,095 INFO L87 Difference]: Start difference. First operand 253 states and 253 transitions. Second operand has 127 states, 127 states have (on average 2.0078740157480315) internal successors, (255), 127 states have internal predecessors, (255), 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 08:05:51,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:05:51,435 INFO L93 Difference]: Finished difference Result 260 states and 260 transitions. [2021-11-07 08:05:51,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2021-11-07 08:05:51,435 INFO L78 Accepts]: Start accepts. Automaton has has 127 states, 127 states have (on average 2.0078740157480315) internal successors, (255), 127 states have internal predecessors, (255), 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 252 [2021-11-07 08:05:51,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:05:51,436 INFO L225 Difference]: With dead ends: 260 [2021-11-07 08:05:51,436 INFO L226 Difference]: Without dead ends: 256 [2021-11-07 08:05:51,437 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 377 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=8001, Invalid=8001, Unknown=0, NotChecked=0, Total=16002 [2021-11-07 08:05:51,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-11-07 08:05:51,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 255. [2021-11-07 08:05:51,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 255 states, 254 states have (on average 1.0039370078740157) internal successors, (255), 254 states have internal predecessors, (255), 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 08:05:51,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 255 states to 255 states and 255 transitions. [2021-11-07 08:05:51,440 INFO L78 Accepts]: Start accepts. Automaton has 255 states and 255 transitions. Word has length 252 [2021-11-07 08:05:51,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:05:51,440 INFO L470 AbstractCegarLoop]: Abstraction has 255 states and 255 transitions. [2021-11-07 08:05:51,440 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 127 states, 127 states have (on average 2.0078740157480315) internal successors, (255), 127 states have internal predecessors, (255), 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 08:05:51,441 INFO L276 IsEmpty]: Start isEmpty. Operand 255 states and 255 transitions. [2021-11-07 08:05:51,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 255 [2021-11-07 08:05:51,441 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:05:51,442 INFO L513 BasicCegarLoop]: trace histogram [124, 124, 1, 1, 1, 1, 1, 1] [2021-11-07 08:05:51,484 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (124)] Forceful destruction successful, exit code 0 [2021-11-07 08:05:51,642 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-11-07 08:05:51,642 INFO L402 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:05:51,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:05:51,643 INFO L85 PathProgramCache]: Analyzing trace with hash -289928795, now seen corresponding path program 124 times [2021-11-07 08:05:51,643 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:05:51,643 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [153613354] [2021-11-07 08:05:51,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:05:51,643 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:05:51,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:05:57,903 INFO L134 CoverageAnalysis]: Checked inductivity of 15376 backedges. 0 proven. 15376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:05:57,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:05:57,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [153613354] [2021-11-07 08:05:57,903 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [153613354] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:05:57,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587014235] [2021-11-07 08:05:57,903 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-07 08:05:57,903 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:05:57,904 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:05:57,904 INFO L229 MonitoredProcess]: Starting monitored process 125 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:05:57,906 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Waiting until timeout for monitored process [2021-11-07 08:06:03,891 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-07 08:06:03,892 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:06:03,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 126 conjunts are in the unsatisfiable core [2021-11-07 08:06:03,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:06:04,703 INFO L134 CoverageAnalysis]: Checked inductivity of 15376 backedges. 0 proven. 15376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:06:04,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [587014235] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:06:04,704 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:06:04,704 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [127, 127] total 128 [2021-11-07 08:06:04,704 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951200172] [2021-11-07 08:06:04,705 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2021-11-07 08:06:04,705 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:06:04,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2021-11-07 08:06:04,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8128, Invalid=8128, Unknown=0, NotChecked=0, Total=16256 [2021-11-07 08:06:04,708 INFO L87 Difference]: Start difference. First operand 255 states and 255 transitions. Second operand has 128 states, 128 states have (on average 2.0078125) internal successors, (257), 128 states have internal predecessors, (257), 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 08:06:05,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:06:05,185 INFO L93 Difference]: Finished difference Result 262 states and 262 transitions. [2021-11-07 08:06:05,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 127 states. [2021-11-07 08:06:05,186 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 128 states have (on average 2.0078125) internal successors, (257), 128 states have internal predecessors, (257), 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 254 [2021-11-07 08:06:05,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:06:05,187 INFO L225 Difference]: With dead ends: 262 [2021-11-07 08:06:05,187 INFO L226 Difference]: Without dead ends: 258 [2021-11-07 08:06:05,188 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 380 GetRequests, 254 SyntacticMatches, 0 SemanticMatches, 126 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 5.9s TimeCoverageRelationStatistics Valid=8128, Invalid=8128, Unknown=0, NotChecked=0, Total=16256 [2021-11-07 08:06:05,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2021-11-07 08:06:05,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 257. [2021-11-07 08:06:05,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 257 states, 256 states have (on average 1.00390625) internal successors, (257), 256 states have internal predecessors, (257), 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 08:06:05,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 257 states to 257 states and 257 transitions. [2021-11-07 08:06:05,192 INFO L78 Accepts]: Start accepts. Automaton has 257 states and 257 transitions. Word has length 254 [2021-11-07 08:06:05,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:06:05,192 INFO L470 AbstractCegarLoop]: Abstraction has 257 states and 257 transitions. [2021-11-07 08:06:05,193 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 128 states have (on average 2.0078125) internal successors, (257), 128 states have internal predecessors, (257), 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 08:06:05,193 INFO L276 IsEmpty]: Start isEmpty. Operand 257 states and 257 transitions. [2021-11-07 08:06:05,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 257 [2021-11-07 08:06:05,194 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:06:05,194 INFO L513 BasicCegarLoop]: trace histogram [125, 125, 1, 1, 1, 1, 1, 1] [2021-11-07 08:06:05,237 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (125)] Ended with exit code 0 [2021-11-07 08:06:05,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2021-11-07 08:06:05,395 INFO L402 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:06:05,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:06:05,395 INFO L85 PathProgramCache]: Analyzing trace with hash 604534567, now seen corresponding path program 125 times [2021-11-07 08:06:05,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:06:05,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804915503] [2021-11-07 08:06:05,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:06:05,396 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:06:05,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:06:11,943 INFO L134 CoverageAnalysis]: Checked inductivity of 15625 backedges. 0 proven. 15625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:06:11,943 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:06:11,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804915503] [2021-11-07 08:06:11,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804915503] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:06:11,944 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373724294] [2021-11-07 08:06:11,944 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-07 08:06:11,944 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:06:11,944 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:06:11,945 INFO L229 MonitoredProcess]: Starting monitored process 126 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:06:11,946 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Waiting until timeout for monitored process [2021-11-07 08:06:17,914 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 126 check-sat command(s) [2021-11-07 08:06:17,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:06:17,919 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 127 conjunts are in the unsatisfiable core [2021-11-07 08:06:17,920 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:06:18,723 INFO L134 CoverageAnalysis]: Checked inductivity of 15625 backedges. 0 proven. 15625 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:06:18,724 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373724294] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:06:18,724 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:06:18,724 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [128, 128] total 129 [2021-11-07 08:06:18,724 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491507711] [2021-11-07 08:06:18,725 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2021-11-07 08:06:18,725 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:06:18,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2021-11-07 08:06:18,728 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2021-11-07 08:06:18,728 INFO L87 Difference]: Start difference. First operand 257 states and 257 transitions. Second operand has 129 states, 129 states have (on average 2.007751937984496) internal successors, (259), 129 states have internal predecessors, (259), 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 08:06:19,136 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:06:19,136 INFO L93 Difference]: Finished difference Result 264 states and 264 transitions. [2021-11-07 08:06:19,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2021-11-07 08:06:19,137 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 2.007751937984496) internal successors, (259), 129 states have internal predecessors, (259), 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 256 [2021-11-07 08:06:19,137 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:06:19,138 INFO L225 Difference]: With dead ends: 264 [2021-11-07 08:06:19,138 INFO L226 Difference]: Without dead ends: 260 [2021-11-07 08:06:19,139 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 383 GetRequests, 256 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2021-11-07 08:06:19,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2021-11-07 08:06:19,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 259. [2021-11-07 08:06:19,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 259 states, 258 states have (on average 1.003875968992248) internal successors, (259), 258 states have internal predecessors, (259), 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 08:06:19,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 259 states to 259 states and 259 transitions. [2021-11-07 08:06:19,143 INFO L78 Accepts]: Start accepts. Automaton has 259 states and 259 transitions. Word has length 256 [2021-11-07 08:06:19,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:06:19,143 INFO L470 AbstractCegarLoop]: Abstraction has 259 states and 259 transitions. [2021-11-07 08:06:19,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 2.007751937984496) internal successors, (259), 129 states have internal predecessors, (259), 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 08:06:19,144 INFO L276 IsEmpty]: Start isEmpty. Operand 259 states and 259 transitions. [2021-11-07 08:06:19,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2021-11-07 08:06:19,144 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:06:19,145 INFO L513 BasicCegarLoop]: trace histogram [126, 126, 1, 1, 1, 1, 1, 1] [2021-11-07 08:06:19,187 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (126)] Ended with exit code 0 [2021-11-07 08:06:19,345 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-11-07 08:06:19,345 INFO L402 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:06:19,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:06:19,346 INFO L85 PathProgramCache]: Analyzing trace with hash 1190366249, now seen corresponding path program 126 times [2021-11-07 08:06:19,346 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:06:19,346 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934959168] [2021-11-07 08:06:19,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:06:19,346 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:06:19,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:06:25,792 INFO L134 CoverageAnalysis]: Checked inductivity of 15876 backedges. 0 proven. 15876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:06:25,792 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:06:25,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934959168] [2021-11-07 08:06:25,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934959168] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:06:25,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361732783] [2021-11-07 08:06:25,792 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-07 08:06:25,792 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:06:25,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:06:25,793 INFO L229 MonitoredProcess]: Starting monitored process 127 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:06:25,795 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Waiting until timeout for monitored process [2021-11-07 08:06:32,070 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 127 check-sat command(s) [2021-11-07 08:06:32,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-07 08:06:32,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 413 conjuncts, 128 conjunts are in the unsatisfiable core [2021-11-07 08:06:32,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:06:32,865 INFO L134 CoverageAnalysis]: Checked inductivity of 15876 backedges. 0 proven. 15876 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:06:32,865 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1361732783] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:06:32,865 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:06:32,865 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [129, 129] total 130 [2021-11-07 08:06:32,865 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [821718850] [2021-11-07 08:06:32,866 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 130 states [2021-11-07 08:06:32,866 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:06:32,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 130 interpolants. [2021-11-07 08:06:32,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8385, Invalid=8385, Unknown=0, NotChecked=0, Total=16770 [2021-11-07 08:06:32,869 INFO L87 Difference]: Start difference. First operand 259 states and 259 transitions. Second operand has 130 states, 130 states have (on average 2.0076923076923077) internal successors, (261), 130 states have internal predecessors, (261), 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 08:06:33,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:06:33,284 INFO L93 Difference]: Finished difference Result 266 states and 266 transitions. [2021-11-07 08:06:33,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-11-07 08:06:33,284 INFO L78 Accepts]: Start accepts. Automaton has has 130 states, 130 states have (on average 2.0076923076923077) internal successors, (261), 130 states have internal predecessors, (261), 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 258 [2021-11-07 08:06:33,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:06:33,285 INFO L225 Difference]: With dead ends: 266 [2021-11-07 08:06:33,285 INFO L226 Difference]: Without dead ends: 262 [2021-11-07 08:06:33,287 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 386 GetRequests, 258 SyntacticMatches, 0 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 6.1s TimeCoverageRelationStatistics Valid=8385, Invalid=8385, Unknown=0, NotChecked=0, Total=16770 [2021-11-07 08:06:33,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2021-11-07 08:06:33,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 261. [2021-11-07 08:06:33,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 261 states, 260 states have (on average 1.0038461538461538) internal successors, (261), 260 states have internal predecessors, (261), 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 08:06:33,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 261 states to 261 states and 261 transitions. [2021-11-07 08:06:33,290 INFO L78 Accepts]: Start accepts. Automaton has 261 states and 261 transitions. Word has length 258 [2021-11-07 08:06:33,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:06:33,291 INFO L470 AbstractCegarLoop]: Abstraction has 261 states and 261 transitions. [2021-11-07 08:06:33,291 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 130 states, 130 states have (on average 2.0076923076923077) internal successors, (261), 130 states have internal predecessors, (261), 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 08:06:33,291 INFO L276 IsEmpty]: Start isEmpty. Operand 261 states and 261 transitions. [2021-11-07 08:06:33,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 261 [2021-11-07 08:06:33,292 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:06:33,292 INFO L513 BasicCegarLoop]: trace histogram [127, 127, 1, 1, 1, 1, 1, 1] [2021-11-07 08:06:33,338 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (127)] Forceful destruction successful, exit code 0 [2021-11-07 08:06:33,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable126 [2021-11-07 08:06:33,498 INFO L402 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:06:33,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:06:33,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1533896875, now seen corresponding path program 127 times [2021-11-07 08:06:33,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:06:33,499 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366547635] [2021-11-07 08:06:33,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:06:33,499 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:06:33,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:06:40,175 INFO L134 CoverageAnalysis]: Checked inductivity of 16129 backedges. 0 proven. 16129 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:06:40,175 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-07 08:06:40,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366547635] [2021-11-07 08:06:40,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [366547635] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:06:40,176 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1628050696] [2021-11-07 08:06:40,176 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-07 08:06:40,176 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:06:40,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 [2021-11-07 08:06:40,178 INFO L229 MonitoredProcess]: Starting monitored process 128 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-07 08:06:40,182 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Waiting until timeout for monitored process [2021-11-07 08:06:46,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-07 08:06:46,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 416 conjuncts, 129 conjunts are in the unsatisfiable core [2021-11-07 08:06:46,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-07 08:06:47,269 INFO L134 CoverageAnalysis]: Checked inductivity of 16129 backedges. 0 proven. 16129 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-07 08:06:47,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1628050696] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-07 08:06:47,269 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-07 08:06:47,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [130, 130] total 131 [2021-11-07 08:06:47,269 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131685328] [2021-11-07 08:06:47,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2021-11-07 08:06:47,271 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-07 08:06:47,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2021-11-07 08:06:47,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8515, Invalid=8515, Unknown=0, NotChecked=0, Total=17030 [2021-11-07 08:06:47,274 INFO L87 Difference]: Start difference. First operand 261 states and 261 transitions. Second operand has 131 states, 131 states have (on average 2.0076335877862594) internal successors, (263), 131 states have internal predecessors, (263), 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 08:06:47,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-07 08:06:47,678 INFO L93 Difference]: Finished difference Result 268 states and 268 transitions. [2021-11-07 08:06:47,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2021-11-07 08:06:47,679 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.0076335877862594) internal successors, (263), 131 states have internal predecessors, (263), 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 260 [2021-11-07 08:06:47,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-07 08:06:47,680 INFO L225 Difference]: With dead ends: 268 [2021-11-07 08:06:47,680 INFO L226 Difference]: Without dead ends: 264 [2021-11-07 08:06:47,682 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 389 GetRequests, 260 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 6.3s TimeCoverageRelationStatistics Valid=8515, Invalid=8515, Unknown=0, NotChecked=0, Total=17030 [2021-11-07 08:06:47,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2021-11-07 08:06:47,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 263. [2021-11-07 08:06:47,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 1.0038167938931297) internal successors, (263), 262 states have internal predecessors, (263), 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 08:06:47,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 263 transitions. [2021-11-07 08:06:47,687 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 263 transitions. Word has length 260 [2021-11-07 08:06:47,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-07 08:06:47,688 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 263 transitions. [2021-11-07 08:06:47,688 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 2.0076335877862594) internal successors, (263), 131 states have internal predecessors, (263), 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 08:06:47,688 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 263 transitions. [2021-11-07 08:06:47,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 263 [2021-11-07 08:06:47,690 INFO L505 BasicCegarLoop]: Found error trace [2021-11-07 08:06:47,690 INFO L513 BasicCegarLoop]: trace histogram [128, 128, 1, 1, 1, 1, 1, 1] [2021-11-07 08:06:47,733 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true (128)] Ended with exit code 0 [2021-11-07 08:06:47,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,128 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0929692-d43a-42c2-963a-a6d1322276cd/bin/uautomizer-AkOaLMaTGY/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-07 08:06:47,894 INFO L402 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-07 08:06:47,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-07 08:06:47,894 INFO L85 PathProgramCache]: Analyzing trace with hash 954346669, now seen corresponding path program 128 times [2021-11-07 08:06:47,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-07 08:06:47,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720147403] [2021-11-07 08:06:47,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-07 08:06:47,895 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-07 08:06:47,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat