./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loop-zilu/benchmark23_conjunctive.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4e77c044 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loop-zilu/benchmark23_conjunctive.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt --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 becf68b1b41bf8f9c75117f82605e436bc8d5a41 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................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-4e77c04 [2021-10-13 00:15:34,693 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-13 00:15:34,696 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-13 00:15:34,746 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-13 00:15:34,746 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-13 00:15:34,748 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-13 00:15:34,750 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-13 00:15:34,752 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-13 00:15:34,755 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-13 00:15:34,757 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-13 00:15:34,758 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-13 00:15:34,760 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-13 00:15:34,760 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-13 00:15:34,762 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-13 00:15:34,764 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-13 00:15:34,766 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-13 00:15:34,767 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-13 00:15:34,768 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-13 00:15:34,771 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-13 00:15:34,774 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-13 00:15:34,776 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-13 00:15:34,778 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-13 00:15:34,779 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-13 00:15:34,781 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-13 00:15:34,785 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-13 00:15:34,786 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-13 00:15:34,786 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-13 00:15:34,787 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-13 00:15:34,788 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-13 00:15:34,789 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-13 00:15:34,790 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-13 00:15:34,791 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-13 00:15:34,792 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-13 00:15:34,793 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-13 00:15:34,795 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-13 00:15:34,795 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-13 00:15:34,800 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-13 00:15:34,801 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-13 00:15:34,801 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-13 00:15:34,802 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-13 00:15:34,803 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-13 00:15:34,806 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-13 00:15:34,854 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-13 00:15:34,854 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-13 00:15:34,855 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-13 00:15:34,855 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-13 00:15:34,861 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-13 00:15:34,862 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-13 00:15:34,862 INFO L138 SettingsManager]: * Use SBE=true [2021-10-13 00:15:34,862 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-13 00:15:34,862 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-13 00:15:34,862 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-13 00:15:34,864 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-13 00:15:34,864 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-13 00:15:34,864 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-13 00:15:34,864 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-13 00:15:34,864 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-13 00:15:34,865 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-13 00:15:34,865 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-13 00:15:34,865 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-13 00:15:34,865 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-13 00:15:34,866 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-13 00:15:34,866 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-13 00:15:34,866 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-13 00:15:34,866 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:15:34,867 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-13 00:15:34,867 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-13 00:15:34,867 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-13 00:15:34,867 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-13 00:15:34,868 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-13 00:15:34,868 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-13 00:15:34,869 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-13 00:15:34,870 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_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> becf68b1b41bf8f9c75117f82605e436bc8d5a41 [2021-10-13 00:15:35,164 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-13 00:15:35,186 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-13 00:15:35,189 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-13 00:15:35,191 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-13 00:15:35,191 INFO L275 PluginConnector]: CDTParser initialized [2021-10-13 00:15:35,192 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/../../sv-benchmarks/c/loop-zilu/benchmark23_conjunctive.i [2021-10-13 00:15:35,267 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/data/2225647a9/c9db22e9509546299af31e9d2950eba1/FLAG9494f1d38 [2021-10-13 00:15:35,736 INFO L306 CDTParser]: Found 1 translation units. [2021-10-13 00:15:35,737 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/sv-benchmarks/c/loop-zilu/benchmark23_conjunctive.i [2021-10-13 00:15:35,743 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/data/2225647a9/c9db22e9509546299af31e9d2950eba1/FLAG9494f1d38 [2021-10-13 00:15:36,123 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/data/2225647a9/c9db22e9509546299af31e9d2950eba1 [2021-10-13 00:15:36,126 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-13 00:15:36,128 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-13 00:15:36,130 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-13 00:15:36,130 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-13 00:15:36,134 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-13 00:15:36,134 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:15:36" (1/1) ... [2021-10-13 00:15:36,135 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@55a9e9c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:15:36, skipping insertion in model container [2021-10-13 00:15:36,136 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 13.10 12:15:36" (1/1) ... [2021-10-13 00:15:36,145 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-13 00:15:36,168 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-13 00:15:36,330 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_61f465c0-3e4e-4d72-a30e-66e99df74857/sv-benchmarks/c/loop-zilu/benchmark23_conjunctive.i[873,886] [2021-10-13 00:15:36,340 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:15:36,349 INFO L203 MainTranslator]: Completed pre-run [2021-10-13 00:15:36,362 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_61f465c0-3e4e-4d72-a30e-66e99df74857/sv-benchmarks/c/loop-zilu/benchmark23_conjunctive.i[873,886] [2021-10-13 00:15:36,365 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-13 00:15:36,378 INFO L208 MainTranslator]: Completed translation [2021-10-13 00:15:36,378 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:15:36 WrapperNode [2021-10-13 00:15:36,378 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-13 00:15:36,380 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-13 00:15:36,380 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-13 00:15:36,380 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-13 00:15:36,399 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:15:36" (1/1) ... [2021-10-13 00:15:36,406 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:15:36" (1/1) ... [2021-10-13 00:15:36,427 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-13 00:15:36,428 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-13 00:15:36,428 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-13 00:15:36,429 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-13 00:15:36,438 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:15:36" (1/1) ... [2021-10-13 00:15:36,438 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:15:36" (1/1) ... [2021-10-13 00:15:36,440 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:15:36" (1/1) ... [2021-10-13 00:15:36,440 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:15:36" (1/1) ... [2021-10-13 00:15:36,447 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:15:36" (1/1) ... [2021-10-13 00:15:36,454 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:15:36" (1/1) ... [2021-10-13 00:15:36,462 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:15:36" (1/1) ... [2021-10-13 00:15:36,467 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-13 00:15:36,469 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-13 00:15:36,470 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-13 00:15:36,470 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-13 00:15:36,471 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:15:36" (1/1) ... [2021-10-13 00:15:36,480 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-13 00:15:36,493 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:15:36,514 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-13 00:15:36,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-13 00:15:36,568 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-13 00:15:36,568 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-13 00:15:36,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-13 00:15:36,571 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-13 00:15:36,785 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-13 00:15:36,786 INFO L299 CfgBuilder]: Removed 7 assume(true) statements. [2021-10-13 00:15:36,787 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:15:36 BoogieIcfgContainer [2021-10-13 00:15:36,788 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-13 00:15:36,790 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-13 00:15:36,790 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-13 00:15:36,793 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-13 00:15:36,794 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 13.10 12:15:36" (1/3) ... [2021-10-13 00:15:36,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@608991d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:15:36, skipping insertion in model container [2021-10-13 00:15:36,795 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 13.10 12:15:36" (2/3) ... [2021-10-13 00:15:36,795 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@608991d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 13.10 12:15:36, skipping insertion in model container [2021-10-13 00:15:36,796 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:15:36" (3/3) ... [2021-10-13 00:15:36,797 INFO L111 eAbstractionObserver]: Analyzing ICFG benchmark23_conjunctive.i [2021-10-13 00:15:36,803 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-13 00:15:36,803 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-13 00:15:36,856 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-13 00:15:36,863 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, mConcurrency=FINITE_AUTOMATA, 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 [2021-10-13 00:15:36,864 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-13 00:15:36,880 INFO L276 IsEmpty]: Start isEmpty. Operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 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) [2021-10-13 00:15:36,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 00:15:36,891 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:15:36,892 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:15:36,893 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:15:36,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:15:36,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1807089479, now seen corresponding path program 1 times [2021-10-13 00:15:36,907 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:15:36,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300649356] [2021-10-13 00:15:36,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:15:36,909 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:15:37,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:15:37,177 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:37,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:15:37,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300649356] [2021-10-13 00:15:37,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300649356] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:15:37,184 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:15:37,189 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-13 00:15:37,191 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079061460] [2021-10-13 00:15:37,196 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-13 00:15:37,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:15:37,219 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-13 00:15:37,220 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 00:15:37,222 INFO L87 Difference]: Start difference. First operand has 12 states, 10 states have (on average 1.5) internal successors, (15), 11 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) Second operand has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:15:37,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:15:37,237 INFO L93 Difference]: Finished difference Result 20 states and 23 transitions. [2021-10-13 00:15:37,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-13 00:15:37,239 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-10-13 00:15:37,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:15:37,247 INFO L225 Difference]: With dead ends: 20 [2021-10-13 00:15:37,248 INFO L226 Difference]: Without dead ends: 8 [2021-10-13 00:15:37,251 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0ms TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-13 00:15:37,268 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8 states. [2021-10-13 00:15:37,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8 to 8. [2021-10-13 00:15:37,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8 states, 7 states have (on average 1.1428571428571428) internal successors, (8), 7 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:15:37,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 8 transitions. [2021-10-13 00:15:37,283 INFO L78 Accepts]: Start accepts. Automaton has 8 states and 8 transitions. Word has length 7 [2021-10-13 00:15:37,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:15:37,284 INFO L470 AbstractCegarLoop]: Abstraction has 8 states and 8 transitions. [2021-10-13 00:15:37,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 3.5) internal successors, (7), 2 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:15:37,284 INFO L276 IsEmpty]: Start isEmpty. Operand 8 states and 8 transitions. [2021-10-13 00:15:37,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2021-10-13 00:15:37,285 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:15:37,285 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:15:37,286 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-13 00:15:37,286 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:15:37,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:15:37,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1806970315, now seen corresponding path program 1 times [2021-10-13 00:15:37,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:15:37,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797248161] [2021-10-13 00:15:37,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:15:37,289 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:15:37,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:15:37,350 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:37,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:15:37,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797248161] [2021-10-13 00:15:37,352 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797248161] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:15:37,352 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:15:37,361 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-13 00:15:37,361 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114037439] [2021-10-13 00:15:37,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-13 00:15:37,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:15:37,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-13 00:15:37,365 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 00:15:37,365 INFO L87 Difference]: Start difference. First operand 8 states and 8 transitions. Second operand has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:15:37,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:15:37,377 INFO L93 Difference]: Finished difference Result 13 states and 13 transitions. [2021-10-13 00:15:37,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-13 00:15:37,378 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2021-10-13 00:15:37,378 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:15:37,379 INFO L225 Difference]: With dead ends: 13 [2021-10-13 00:15:37,379 INFO L226 Difference]: Without dead ends: 9 [2021-10-13 00:15:37,380 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-13 00:15:37,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9 states. [2021-10-13 00:15:37,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9 to 9. [2021-10-13 00:15:37,383 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) [2021-10-13 00:15:37,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 9 transitions. [2021-10-13 00:15:37,384 INFO L78 Accepts]: Start accepts. Automaton has 9 states and 9 transitions. Word has length 7 [2021-10-13 00:15:37,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:15:37,385 INFO L470 AbstractCegarLoop]: Abstraction has 9 states and 9 transitions. [2021-10-13 00:15:37,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:15:37,385 INFO L276 IsEmpty]: Start isEmpty. Operand 9 states and 9 transitions. [2021-10-13 00:15:37,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2021-10-13 00:15:37,386 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:15:37,386 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:15:37,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-13 00:15:37,387 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:15:37,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:15:37,388 INFO L82 PathProgramCache]: Analyzing trace with hash 183170323, now seen corresponding path program 1 times [2021-10-13 00:15:37,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:15:37,408 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789434519] [2021-10-13 00:15:37,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:15:37,408 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:15:37,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:15:37,463 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:37,464 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:15:37,464 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789434519] [2021-10-13 00:15:37,464 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1789434519] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:15:37,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828888527] [2021-10-13 00:15:37,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:15:37,465 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:15:37,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:15:37,476 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:15:37,499 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-13 00:15:37,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:15:37,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 50 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-13 00:15:37,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:15:37,639 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:37,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1828888527] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:15:37,640 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:15:37,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-10-13 00:15:37,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230553282] [2021-10-13 00:15:37,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-13 00:15:37,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:15:37,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-13 00:15:37,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:15:37,643 INFO L87 Difference]: Start difference. First operand 9 states and 9 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:15:37,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:15:37,658 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2021-10-13 00:15:37,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-13 00:15:37,658 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 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 [2021-10-13 00:15:37,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:15:37,659 INFO L225 Difference]: With dead ends: 14 [2021-10-13 00:15:37,659 INFO L226 Difference]: Without dead ends: 10 [2021-10-13 00:15:37,660 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.4ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-13 00:15:37,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 10 states. [2021-10-13 00:15:37,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 10 to 10. [2021-10-13 00:15:37,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 10 states, 9 states have (on average 1.1111111111111112) internal successors, (10), 9 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:15:37,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 10 transitions. [2021-10-13 00:15:37,663 INFO L78 Accepts]: Start accepts. Automaton has 10 states and 10 transitions. Word has length 8 [2021-10-13 00:15:37,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:15:37,664 INFO L470 AbstractCegarLoop]: Abstraction has 10 states and 10 transitions. [2021-10-13 00:15:37,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:15:37,664 INFO L276 IsEmpty]: Start isEmpty. Operand 10 states and 10 transitions. [2021-10-13 00:15:37,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2021-10-13 00:15:37,665 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:15:37,665 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:15:37,706 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-13 00:15:37,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:15:37,892 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:15:37,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:15:37,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1384978123, now seen corresponding path program 2 times [2021-10-13 00:15:37,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:15:37,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931956879] [2021-10-13 00:15:37,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:15:37,894 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:15:37,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:15:37,982 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:37,982 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:15:37,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931956879] [2021-10-13 00:15:37,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931956879] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:15:37,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600725263] [2021-10-13 00:15:37,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:15:37,984 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:15:37,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:15:38,000 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:15:38,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-13 00:15:38,070 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:15:38,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:15:38,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-13 00:15:38,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:15:38,106 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:38,106 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [600725263] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:15:38,106 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:15:38,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-10-13 00:15:38,107 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855857065] [2021-10-13 00:15:38,107 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-13 00:15:38,107 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:15:38,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-13 00:15:38,108 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:15:38,109 INFO L87 Difference]: Start difference. First operand 10 states and 10 transitions. Second operand has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 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) [2021-10-13 00:15:38,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:15:38,121 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2021-10-13 00:15:38,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-13 00:15:38,122 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 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) Word has length 9 [2021-10-13 00:15:38,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:15:38,122 INFO L225 Difference]: With dead ends: 15 [2021-10-13 00:15:38,122 INFO L226 Difference]: Without dead ends: 11 [2021-10-13 00:15:38,123 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 26.9ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-13 00:15:38,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 11 states. [2021-10-13 00:15:38,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 11 to 11. [2021-10-13 00:15:38,125 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) [2021-10-13 00:15:38,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 11 transitions. [2021-10-13 00:15:38,126 INFO L78 Accepts]: Start accepts. Automaton has 11 states and 11 transitions. Word has length 9 [2021-10-13 00:15:38,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:15:38,127 INFO L470 AbstractCegarLoop]: Abstraction has 11 states and 11 transitions. [2021-10-13 00:15:38,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 1.8) internal successors, (9), 5 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) [2021-10-13 00:15:38,127 INFO L276 IsEmpty]: Start isEmpty. Operand 11 states and 11 transitions. [2021-10-13 00:15:38,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2021-10-13 00:15:38,128 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:15:38,128 INFO L512 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:15:38,169 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-13 00:15:38,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:15:38,349 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:15:38,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:15:38,349 INFO L82 PathProgramCache]: Analyzing trace with hash -13685741, now seen corresponding path program 3 times [2021-10-13 00:15:38,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:15:38,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934537530] [2021-10-13 00:15:38,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:15:38,350 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:15:38,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:15:38,437 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:38,437 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:15:38,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934537530] [2021-10-13 00:15:38,438 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934537530] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:15:38,438 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [173555379] [2021-10-13 00:15:38,438 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 00:15:38,438 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:15:38,439 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:15:38,440 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:15:38,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-13 00:15:38,513 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-13 00:15:38,513 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:15:38,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-13 00:15:38,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:15:38,586 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:38,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [173555379] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:15:38,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:15:38,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-10-13 00:15:38,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607261689] [2021-10-13 00:15:38,589 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-10-13 00:15:38,590 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:15:38,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-10-13 00:15:38,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:15:38,591 INFO L87 Difference]: Start difference. First operand 11 states and 11 transitions. Second operand has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:15:38,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:15:38,611 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2021-10-13 00:15:38,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-13 00:15:38,614 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 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 [2021-10-13 00:15:38,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:15:38,615 INFO L225 Difference]: With dead ends: 16 [2021-10-13 00:15:38,615 INFO L226 Difference]: Without dead ends: 12 [2021-10-13 00:15:38,617 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 16.2ms TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2021-10-13 00:15:38,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-10-13 00:15:38,621 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-10-13 00:15:38,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.0909090909090908) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:15:38,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2021-10-13 00:15:38,624 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 10 [2021-10-13 00:15:38,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:15:38,624 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2021-10-13 00:15:38,624 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.6666666666666667) internal successors, (10), 6 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:15:38,624 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2021-10-13 00:15:38,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-10-13 00:15:38,625 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:15:38,625 INFO L512 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:15:38,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-13 00:15:38,830 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:15:38,831 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:15:38,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:15:38,832 INFO L82 PathProgramCache]: Analyzing trace with hash -422592565, now seen corresponding path program 4 times [2021-10-13 00:15:38,832 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:15:38,832 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352380414] [2021-10-13 00:15:38,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:15:38,833 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:15:38,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:15:38,928 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:38,928 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:15:38,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352380414] [2021-10-13 00:15:38,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352380414] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:15:38,928 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684445280] [2021-10-13 00:15:38,929 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 00:15:38,929 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:15:38,929 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:15:38,930 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:15:38,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-13 00:15:38,987 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 00:15:38,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:15:38,988 INFO L263 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-13 00:15:38,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:15:39,027 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:39,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684445280] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:15:39,028 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:15:39,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-10-13 00:15:39,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767033731] [2021-10-13 00:15:39,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-13 00:15:39,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:15:39,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-13 00:15:39,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-13 00:15:39,030 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 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) [2021-10-13 00:15:39,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:15:39,045 INFO L93 Difference]: Finished difference Result 17 states and 17 transitions. [2021-10-13 00:15:39,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-13 00:15:39,046 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 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 11 [2021-10-13 00:15:39,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:15:39,046 INFO L225 Difference]: With dead ends: 17 [2021-10-13 00:15:39,046 INFO L226 Difference]: Without dead ends: 13 [2021-10-13 00:15:39,057 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 19.0ms TimeCoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2021-10-13 00:15:39,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 13 states. [2021-10-13 00:15:39,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 13 to 13. [2021-10-13 00:15:39,060 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) [2021-10-13 00:15:39,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 13 transitions. [2021-10-13 00:15:39,061 INFO L78 Accepts]: Start accepts. Automaton has 13 states and 13 transitions. Word has length 11 [2021-10-13 00:15:39,061 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:15:39,061 INFO L470 AbstractCegarLoop]: Abstraction has 13 states and 13 transitions. [2021-10-13 00:15:39,061 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 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) [2021-10-13 00:15:39,062 INFO L276 IsEmpty]: Start isEmpty. Operand 13 states and 13 transitions. [2021-10-13 00:15:39,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-13 00:15:39,062 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:15:39,062 INFO L512 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:15:39,100 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-13 00:15:39,277 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:15:39,277 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:15:39,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:15:39,278 INFO L82 PathProgramCache]: Analyzing trace with hash -213802221, now seen corresponding path program 5 times [2021-10-13 00:15:39,278 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:15:39,278 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160946473] [2021-10-13 00:15:39,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:15:39,278 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:15:39,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:15:39,360 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:39,360 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:15:39,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160946473] [2021-10-13 00:15:39,361 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160946473] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:15:39,361 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213311031] [2021-10-13 00:15:39,361 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 00:15:39,361 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:15:39,362 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:15:39,373 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:15:39,392 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-13 00:15:39,431 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-10-13 00:15:39,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:15:39,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 70 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-13 00:15:39,434 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:15:39,513 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:39,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213311031] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:15:39,513 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:15:39,514 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2021-10-13 00:15:39,514 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775372111] [2021-10-13 00:15:39,514 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-13 00:15:39,514 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:15:39,515 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-13 00:15:39,515 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-13 00:15:39,519 INFO L87 Difference]: Start difference. First operand 13 states and 13 transitions. Second operand has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:15:39,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:15:39,539 INFO L93 Difference]: Finished difference Result 18 states and 18 transitions. [2021-10-13 00:15:39,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-13 00:15:39,540 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 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 [2021-10-13 00:15:39,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:15:39,541 INFO L225 Difference]: With dead ends: 18 [2021-10-13 00:15:39,541 INFO L226 Difference]: Without dead ends: 14 [2021-10-13 00:15:39,542 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 31.7ms TimeCoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2021-10-13 00:15:39,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2021-10-13 00:15:39,545 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2021-10-13 00:15:39,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 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) [2021-10-13 00:15:39,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2021-10-13 00:15:39,547 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 12 [2021-10-13 00:15:39,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:15:39,548 INFO L470 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2021-10-13 00:15:39,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 1.5) internal successors, (12), 8 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:15:39,548 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2021-10-13 00:15:39,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-13 00:15:39,549 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:15:39,549 INFO L512 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:15:39,586 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-13 00:15:39,775 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:15:39,776 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:15:39,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:15:39,776 INFO L82 PathProgramCache]: Analyzing trace with hash 1963731147, now seen corresponding path program 6 times [2021-10-13 00:15:39,777 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:15:39,777 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612860103] [2021-10-13 00:15:39,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:15:39,777 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:15:39,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:15:39,866 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:39,873 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:15:39,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612860103] [2021-10-13 00:15:39,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612860103] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:15:39,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1560728524] [2021-10-13 00:15:39,874 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 00:15:39,874 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:15:39,876 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:15:39,877 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:15:39,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-13 00:15:39,952 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-13 00:15:39,952 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:15:39,953 INFO L263 TraceCheckSpWp]: Trace formula consists of 75 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-13 00:15:39,954 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:15:40,030 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:40,030 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1560728524] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:15:40,030 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:15:40,030 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2021-10-13 00:15:40,031 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266745778] [2021-10-13 00:15:40,031 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-13 00:15:40,032 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:15:40,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-13 00:15:40,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-10-13 00:15:40,033 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 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) [2021-10-13 00:15:40,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:15:40,058 INFO L93 Difference]: Finished difference Result 19 states and 19 transitions. [2021-10-13 00:15:40,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-13 00:15:40,059 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 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 13 [2021-10-13 00:15:40,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:15:40,060 INFO L225 Difference]: With dead ends: 19 [2021-10-13 00:15:40,060 INFO L226 Difference]: Without dead ends: 15 [2021-10-13 00:15:40,061 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 43.0ms TimeCoverageRelationStatistics Valid=36, Invalid=36, Unknown=0, NotChecked=0, Total=72 [2021-10-13 00:15:40,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2021-10-13 00:15:40,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2021-10-13 00:15:40,063 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) [2021-10-13 00:15:40,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2021-10-13 00:15:40,064 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 13 [2021-10-13 00:15:40,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:15:40,064 INFO L470 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2021-10-13 00:15:40,064 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.4444444444444444) internal successors, (13), 9 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) [2021-10-13 00:15:40,065 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2021-10-13 00:15:40,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-13 00:15:40,065 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:15:40,065 INFO L512 BasicCegarLoop]: trace histogram [7, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:15:40,104 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-13 00:15:40,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2021-10-13 00:15:40,292 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:15:40,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:15:40,292 INFO L82 PathProgramCache]: Analyzing trace with hash 747788819, now seen corresponding path program 7 times [2021-10-13 00:15:40,292 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:15:40,292 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636249122] [2021-10-13 00:15:40,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:15:40,293 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:15:40,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:15:40,416 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:40,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:15:40,416 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636249122] [2021-10-13 00:15:40,416 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636249122] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:15:40,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044974566] [2021-10-13 00:15:40,417 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 00:15:40,417 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:15:40,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:15:40,428 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:15:40,445 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-13 00:15:40,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:15:40,504 INFO L263 TraceCheckSpWp]: Trace formula consists of 80 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-13 00:15:40,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:15:40,576 INFO L134 CoverageAnalysis]: Checked inductivity of 28 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:40,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1044974566] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:15:40,577 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:15:40,577 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2021-10-13 00:15:40,580 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59066495] [2021-10-13 00:15:40,580 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-10-13 00:15:40,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:15:40,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-10-13 00:15:40,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-10-13 00:15:40,583 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 10 states, 10 states have (on average 1.4) internal successors, (14), 10 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) [2021-10-13 00:15:40,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:15:40,603 INFO L93 Difference]: Finished difference Result 20 states and 20 transitions. [2021-10-13 00:15:40,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-13 00:15:40,606 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 10 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) Word has length 14 [2021-10-13 00:15:40,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:15:40,608 INFO L225 Difference]: With dead ends: 20 [2021-10-13 00:15:40,608 INFO L226 Difference]: Without dead ends: 16 [2021-10-13 00:15:40,608 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 53.4ms TimeCoverageRelationStatistics Valid=45, Invalid=45, Unknown=0, NotChecked=0, Total=90 [2021-10-13 00:15:40,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-13 00:15:40,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-10-13 00:15:40,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.0666666666666667) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:15:40,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2021-10-13 00:15:40,619 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 14 [2021-10-13 00:15:40,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:15:40,619 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2021-10-13 00:15:40,620 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.4) internal successors, (14), 10 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) [2021-10-13 00:15:40,620 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2021-10-13 00:15:40,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-13 00:15:40,621 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:15:40,621 INFO L512 BasicCegarLoop]: trace histogram [8, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:15:40,664 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-13 00:15:40,844 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:15:40,844 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:15:40,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:15:40,845 INFO L82 PathProgramCache]: Analyzing trace with hash 1708282315, now seen corresponding path program 8 times [2021-10-13 00:15:40,845 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:15:40,845 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819214337] [2021-10-13 00:15:40,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:15:40,845 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:15:40,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:15:40,972 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:40,972 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:15:40,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819214337] [2021-10-13 00:15:40,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819214337] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:15:40,972 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348903252] [2021-10-13 00:15:40,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:15:40,972 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:15:40,973 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:15:40,973 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:15:40,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-13 00:15:41,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:15:41,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:15:41,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-13 00:15:41,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:15:41,105 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:41,105 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348903252] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:15:41,105 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:15:41,106 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2021-10-13 00:15:41,106 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2078875714] [2021-10-13 00:15:41,106 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-13 00:15:41,106 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:15:41,107 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-13 00:15:41,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-10-13 00:15:41,107 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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) [2021-10-13 00:15:41,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:15:41,129 INFO L93 Difference]: Finished difference Result 21 states and 21 transitions. [2021-10-13 00:15:41,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-13 00:15:41,130 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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 15 [2021-10-13 00:15:41,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:15:41,130 INFO L225 Difference]: With dead ends: 21 [2021-10-13 00:15:41,130 INFO L226 Difference]: Without dead ends: 17 [2021-10-13 00:15:41,131 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 46.1ms TimeCoverageRelationStatistics Valid=55, Invalid=55, Unknown=0, NotChecked=0, Total=110 [2021-10-13 00:15:41,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2021-10-13 00:15:41,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2021-10-13 00:15:41,144 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) [2021-10-13 00:15:41,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 17 transitions. [2021-10-13 00:15:41,144 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 17 transitions. Word has length 15 [2021-10-13 00:15:41,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:15:41,145 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 17 transitions. [2021-10-13 00:15:41,145 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 1.3636363636363635) internal successors, (15), 11 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) [2021-10-13 00:15:41,145 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 17 transitions. [2021-10-13 00:15:41,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-13 00:15:41,146 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:15:41,146 INFO L512 BasicCegarLoop]: trace histogram [9, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:15:41,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-13 00:15:41,359 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-10-13 00:15:41,360 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:15:41,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:15:41,360 INFO L82 PathProgramCache]: Analyzing trace with hash 1418809619, now seen corresponding path program 9 times [2021-10-13 00:15:41,360 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:15:41,360 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698408738] [2021-10-13 00:15:41,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:15:41,361 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:15:41,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:15:41,507 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:41,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:15:41,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698408738] [2021-10-13 00:15:41,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698408738] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:15:41,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520354398] [2021-10-13 00:15:41,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 00:15:41,508 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:15:41,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:15:41,509 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:15:41,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-13 00:15:41,604 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-10-13 00:15:41,604 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:15:41,605 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-13 00:15:41,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:15:41,667 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:41,667 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520354398] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:15:41,667 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:15:41,667 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-10-13 00:15:41,668 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1270323765] [2021-10-13 00:15:41,668 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-13 00:15:41,668 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:15:41,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-13 00:15:41,669 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-10-13 00:15:41,669 INFO L87 Difference]: Start difference. First operand 17 states and 17 transitions. Second operand has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:15:41,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:15:41,691 INFO L93 Difference]: Finished difference Result 22 states and 22 transitions. [2021-10-13 00:15:41,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-13 00:15:41,692 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 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 [2021-10-13 00:15:41,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:15:41,692 INFO L225 Difference]: With dead ends: 22 [2021-10-13 00:15:41,692 INFO L226 Difference]: Without dead ends: 18 [2021-10-13 00:15:41,693 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 57.9ms TimeCoverageRelationStatistics Valid=66, Invalid=66, Unknown=0, NotChecked=0, Total=132 [2021-10-13 00:15:41,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-10-13 00:15:41,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-10-13 00:15:41,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.0588235294117647) internal successors, (18), 17 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:15:41,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 18 transitions. [2021-10-13 00:15:41,696 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 18 transitions. Word has length 16 [2021-10-13 00:15:41,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:15:41,696 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 18 transitions. [2021-10-13 00:15:41,696 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.3333333333333333) internal successors, (16), 12 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:15:41,696 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 18 transitions. [2021-10-13 00:15:41,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-13 00:15:41,697 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:15:41,697 INFO L512 BasicCegarLoop]: trace histogram [10, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:15:41,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-13 00:15:41,919 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-13 00:15:41,920 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:15:41,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:15:41,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1035090635, now seen corresponding path program 10 times [2021-10-13 00:15:41,920 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:15:41,921 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [526471230] [2021-10-13 00:15:41,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:15:41,921 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:15:41,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:15:42,046 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:42,046 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:15:42,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [526471230] [2021-10-13 00:15:42,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [526471230] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:15:42,046 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [15326139] [2021-10-13 00:15:42,047 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 00:15:42,047 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:15:42,047 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:15:42,052 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:15:42,067 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-13 00:15:42,142 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 00:15:42,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:15:42,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-13 00:15:42,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:15:42,212 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:42,212 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [15326139] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:15:42,213 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:15:42,213 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2021-10-13 00:15:42,213 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263440157] [2021-10-13 00:15:42,214 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-13 00:15:42,215 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:15:42,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-13 00:15:42,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-10-13 00:15:42,216 INFO L87 Difference]: Start difference. First operand 18 states and 18 transitions. Second operand has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 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) [2021-10-13 00:15:42,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:15:42,240 INFO L93 Difference]: Finished difference Result 23 states and 23 transitions. [2021-10-13 00:15:42,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-13 00:15:42,240 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-13 00:15:42,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:15:42,241 INFO L225 Difference]: With dead ends: 23 [2021-10-13 00:15:42,241 INFO L226 Difference]: Without dead ends: 19 [2021-10-13 00:15:42,242 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 71.4ms TimeCoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2021-10-13 00:15:42,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2021-10-13 00:15:42,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2021-10-13 00:15:42,245 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) [2021-10-13 00:15:42,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 19 transitions. [2021-10-13 00:15:42,247 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 19 transitions. Word has length 17 [2021-10-13 00:15:42,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:15:42,247 INFO L470 AbstractCegarLoop]: Abstraction has 19 states and 19 transitions. [2021-10-13 00:15:42,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.3076923076923077) internal successors, (17), 13 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) [2021-10-13 00:15:42,248 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 19 transitions. [2021-10-13 00:15:42,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-13 00:15:42,249 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:15:42,249 INFO L512 BasicCegarLoop]: trace histogram [11, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:15:42,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-13 00:15:42,463 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:15:42,464 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:15:42,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:15:42,464 INFO L82 PathProgramCache]: Analyzing trace with hash 2024704019, now seen corresponding path program 11 times [2021-10-13 00:15:42,464 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:15:42,464 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385675380] [2021-10-13 00:15:42,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:15:42,464 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:15:42,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:15:42,613 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:42,613 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:15:42,613 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385675380] [2021-10-13 00:15:42,614 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385675380] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:15:42,614 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380295579] [2021-10-13 00:15:42,614 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 00:15:42,614 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:15:42,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:15:42,616 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:15:42,623 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-13 00:15:42,707 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-10-13 00:15:42,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:15:42,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-13 00:15:42,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:15:42,788 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:42,788 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380295579] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:15:42,789 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:15:42,789 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2021-10-13 00:15:42,790 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500096484] [2021-10-13 00:15:42,791 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-13 00:15:42,791 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:15:42,792 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-13 00:15:42,792 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-10-13 00:15:42,793 INFO L87 Difference]: Start difference. First operand 19 states and 19 transitions. Second operand has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:15:42,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:15:42,815 INFO L93 Difference]: Finished difference Result 24 states and 24 transitions. [2021-10-13 00:15:42,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-13 00:15:42,816 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 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 [2021-10-13 00:15:42,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:15:42,818 INFO L225 Difference]: With dead ends: 24 [2021-10-13 00:15:42,819 INFO L226 Difference]: Without dead ends: 20 [2021-10-13 00:15:42,819 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 68.2ms TimeCoverageRelationStatistics Valid=91, Invalid=91, Unknown=0, NotChecked=0, Total=182 [2021-10-13 00:15:42,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-13 00:15:42,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2021-10-13 00:15:42,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.0526315789473684) internal successors, (20), 19 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:15:42,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 20 transitions. [2021-10-13 00:15:42,829 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 20 transitions. Word has length 18 [2021-10-13 00:15:42,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:15:42,829 INFO L470 AbstractCegarLoop]: Abstraction has 20 states and 20 transitions. [2021-10-13 00:15:42,830 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.2857142857142858) internal successors, (18), 14 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:15:42,830 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 20 transitions. [2021-10-13 00:15:42,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-10-13 00:15:42,831 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:15:42,831 INFO L512 BasicCegarLoop]: trace histogram [12, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:15:42,871 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-13 00:15:43,043 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:15:43,044 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:15:43,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:15:43,044 INFO L82 PathProgramCache]: Analyzing trace with hash -1657019445, now seen corresponding path program 12 times [2021-10-13 00:15:43,044 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:15:43,044 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761555625] [2021-10-13 00:15:43,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:15:43,045 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:15:43,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:15:43,193 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:43,194 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:15:43,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761555625] [2021-10-13 00:15:43,194 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761555625] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:15:43,194 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541242154] [2021-10-13 00:15:43,194 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 00:15:43,195 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:15:43,195 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:15:43,196 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:15:43,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-13 00:15:43,291 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-10-13 00:15:43,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:15:43,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-13 00:15:43,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:15:43,356 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 78 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:43,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541242154] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:15:43,356 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:15:43,356 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2021-10-13 00:15:43,357 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766120465] [2021-10-13 00:15:43,357 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-13 00:15:43,357 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:15:43,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-13 00:15:43,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-10-13 00:15:43,358 INFO L87 Difference]: Start difference. First operand 20 states and 20 transitions. Second operand has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 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) [2021-10-13 00:15:43,376 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:15:43,376 INFO L93 Difference]: Finished difference Result 25 states and 25 transitions. [2021-10-13 00:15:43,377 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-13 00:15:43,377 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-10-13 00:15:43,377 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:15:43,378 INFO L225 Difference]: With dead ends: 25 [2021-10-13 00:15:43,378 INFO L226 Difference]: Without dead ends: 21 [2021-10-13 00:15:43,378 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 93.6ms TimeCoverageRelationStatistics Valid=105, Invalid=105, Unknown=0, NotChecked=0, Total=210 [2021-10-13 00:15:43,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2021-10-13 00:15:43,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2021-10-13 00:15:43,381 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) [2021-10-13 00:15:43,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 21 transitions. [2021-10-13 00:15:43,381 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 21 transitions. Word has length 19 [2021-10-13 00:15:43,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:15:43,382 INFO L470 AbstractCegarLoop]: Abstraction has 21 states and 21 transitions. [2021-10-13 00:15:43,382 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 1.2666666666666666) internal successors, (19), 15 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) [2021-10-13 00:15:43,382 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 21 transitions. [2021-10-13 00:15:43,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-10-13 00:15:43,383 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:15:43,383 INFO L512 BasicCegarLoop]: trace histogram [13, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:15:43,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-13 00:15:43,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-13 00:15:43,596 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:15:43,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:15:43,596 INFO L82 PathProgramCache]: Analyzing trace with hash 173670163, now seen corresponding path program 13 times [2021-10-13 00:15:43,596 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:15:43,596 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882703526] [2021-10-13 00:15:43,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:15:43,597 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:15:43,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:15:43,749 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:43,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:15:43,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882703526] [2021-10-13 00:15:43,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882703526] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:15:43,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1513067396] [2021-10-13 00:15:43,750 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 00:15:43,750 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:15:43,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:15:43,754 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:15:43,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-13 00:15:43,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:15:43,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-13 00:15:43,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:15:43,928 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:43,928 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1513067396] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:15:43,928 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:15:43,929 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2021-10-13 00:15:43,929 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106592605] [2021-10-13 00:15:43,929 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-13 00:15:43,929 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:15:43,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-13 00:15:43,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-10-13 00:15:43,930 INFO L87 Difference]: Start difference. First operand 21 states and 21 transitions. Second operand has 16 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:15:43,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:15:43,953 INFO L93 Difference]: Finished difference Result 26 states and 26 transitions. [2021-10-13 00:15:43,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-13 00:15:43,953 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 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 [2021-10-13 00:15:43,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:15:43,954 INFO L225 Difference]: With dead ends: 26 [2021-10-13 00:15:43,954 INFO L226 Difference]: Without dead ends: 22 [2021-10-13 00:15:43,954 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 101.9ms TimeCoverageRelationStatistics Valid=120, Invalid=120, Unknown=0, NotChecked=0, Total=240 [2021-10-13 00:15:43,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-10-13 00:15:43,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-10-13 00:15:43,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.0476190476190477) internal successors, (22), 21 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:15:43,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 22 transitions. [2021-10-13 00:15:43,958 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 22 transitions. Word has length 20 [2021-10-13 00:15:43,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:15:43,958 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 22 transitions. [2021-10-13 00:15:43,958 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.25) internal successors, (20), 16 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:15:43,958 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 22 transitions. [2021-10-13 00:15:43,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-13 00:15:43,959 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:15:43,959 INFO L512 BasicCegarLoop]: trace histogram [14, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:15:43,994 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-13 00:15:44,175 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:15:44,176 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:15:44,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:15:44,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1090473163, now seen corresponding path program 14 times [2021-10-13 00:15:44,176 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:15:44,176 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752704480] [2021-10-13 00:15:44,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:15:44,176 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:15:44,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:15:44,337 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:44,337 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:15:44,337 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752704480] [2021-10-13 00:15:44,338 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [752704480] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:15:44,338 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67657505] [2021-10-13 00:15:44,338 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:15:44,338 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:15:44,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:15:44,339 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:15:44,366 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-13 00:15:44,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:15:44,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:15:44,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-13 00:15:44,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:15:44,523 INFO L134 CoverageAnalysis]: Checked inductivity of 105 backedges. 0 proven. 105 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:44,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67657505] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:15:44,524 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:15:44,524 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2021-10-13 00:15:44,524 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010759463] [2021-10-13 00:15:44,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-13 00:15:44,525 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:15:44,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-13 00:15:44,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-10-13 00:15:44,526 INFO L87 Difference]: Start difference. First operand 22 states and 22 transitions. Second operand has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 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) [2021-10-13 00:15:44,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:15:44,561 INFO L93 Difference]: Finished difference Result 27 states and 27 transitions. [2021-10-13 00:15:44,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-13 00:15:44,562 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 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 21 [2021-10-13 00:15:44,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:15:44,563 INFO L225 Difference]: With dead ends: 27 [2021-10-13 00:15:44,563 INFO L226 Difference]: Without dead ends: 23 [2021-10-13 00:15:44,563 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 100.4ms TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2021-10-13 00:15:44,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-10-13 00:15:44,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-10-13 00:15:44,567 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) [2021-10-13 00:15:44,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 23 transitions. [2021-10-13 00:15:44,568 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 23 transitions. Word has length 21 [2021-10-13 00:15:44,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:15:44,569 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 23 transitions. [2021-10-13 00:15:44,569 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.2352941176470589) internal successors, (21), 17 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) [2021-10-13 00:15:44,570 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 23 transitions. [2021-10-13 00:15:44,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-10-13 00:15:44,572 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:15:44,573 INFO L512 BasicCegarLoop]: trace histogram [15, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:15:44,596 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-13 00:15:44,779 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-13 00:15:44,780 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:15:44,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:15:44,780 INFO L82 PathProgramCache]: Analyzing trace with hash -553404909, now seen corresponding path program 15 times [2021-10-13 00:15:44,781 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:15:44,781 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097587192] [2021-10-13 00:15:44,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:15:44,781 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:15:44,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:15:45,001 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:45,001 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:15:45,001 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097587192] [2021-10-13 00:15:45,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097587192] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:15:45,002 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486963070] [2021-10-13 00:15:45,002 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 00:15:45,002 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:15:45,002 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:15:45,004 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:15:45,030 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-13 00:15:45,131 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2021-10-13 00:15:45,131 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:15:45,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-13 00:15:45,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:15:45,203 INFO L134 CoverageAnalysis]: Checked inductivity of 120 backedges. 0 proven. 120 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:45,204 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1486963070] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:15:45,204 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:15:45,204 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2021-10-13 00:15:45,204 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160367054] [2021-10-13 00:15:45,205 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-13 00:15:45,205 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:15:45,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-13 00:15:45,205 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-10-13 00:15:45,205 INFO L87 Difference]: Start difference. First operand 23 states and 23 transitions. Second operand has 18 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:15:45,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:15:45,234 INFO L93 Difference]: Finished difference Result 28 states and 28 transitions. [2021-10-13 00:15:45,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-13 00:15:45,235 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 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 [2021-10-13 00:15:45,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:15:45,236 INFO L225 Difference]: With dead ends: 28 [2021-10-13 00:15:45,236 INFO L226 Difference]: Without dead ends: 24 [2021-10-13 00:15:45,236 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 130.5ms TimeCoverageRelationStatistics Valid=153, Invalid=153, Unknown=0, NotChecked=0, Total=306 [2021-10-13 00:15:45,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2021-10-13 00:15:45,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2021-10-13 00:15:45,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.0434782608695652) internal successors, (24), 23 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:15:45,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 24 transitions. [2021-10-13 00:15:45,240 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 24 transitions. Word has length 22 [2021-10-13 00:15:45,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:15:45,240 INFO L470 AbstractCegarLoop]: Abstraction has 24 states and 24 transitions. [2021-10-13 00:15:45,240 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.2222222222222223) internal successors, (22), 18 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:15:45,241 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 24 transitions. [2021-10-13 00:15:45,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-10-13 00:15:45,241 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:15:45,241 INFO L512 BasicCegarLoop]: trace histogram [16, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:15:45,283 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-13 00:15:45,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-13 00:15:45,468 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:15:45,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:15:45,468 INFO L82 PathProgramCache]: Analyzing trace with hash 25982411, now seen corresponding path program 16 times [2021-10-13 00:15:45,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:15:45,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180837250] [2021-10-13 00:15:45,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:15:45,468 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:15:45,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:15:45,653 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:45,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:15:45,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180837250] [2021-10-13 00:15:45,653 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1180837250] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:15:45,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1337655018] [2021-10-13 00:15:45,653 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 00:15:45,653 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:15:45,654 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:15:45,655 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:15:45,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-13 00:15:45,797 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 00:15:45,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:15:45,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-13 00:15:45,801 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:15:45,907 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:45,908 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1337655018] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:15:45,908 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:15:45,908 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2021-10-13 00:15:45,908 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1548661136] [2021-10-13 00:15:45,909 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-13 00:15:45,909 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:15:45,910 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-13 00:15:45,910 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-10-13 00:15:45,910 INFO L87 Difference]: Start difference. First operand 24 states and 24 transitions. Second operand has 19 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 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) [2021-10-13 00:15:45,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:15:45,933 INFO L93 Difference]: Finished difference Result 29 states and 29 transitions. [2021-10-13 00:15:45,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-13 00:15:45,934 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 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 23 [2021-10-13 00:15:45,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:15:45,934 INFO L225 Difference]: With dead ends: 29 [2021-10-13 00:15:45,934 INFO L226 Difference]: Without dead ends: 25 [2021-10-13 00:15:45,935 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 129.7ms TimeCoverageRelationStatistics Valid=171, Invalid=171, Unknown=0, NotChecked=0, Total=342 [2021-10-13 00:15:45,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-10-13 00:15:45,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2021-10-13 00:15:45,938 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) [2021-10-13 00:15:45,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 25 transitions. [2021-10-13 00:15:45,939 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 25 transitions. Word has length 23 [2021-10-13 00:15:45,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:15:45,939 INFO L470 AbstractCegarLoop]: Abstraction has 25 states and 25 transitions. [2021-10-13 00:15:45,951 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 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) [2021-10-13 00:15:45,951 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 25 transitions. [2021-10-13 00:15:45,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-13 00:15:45,953 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:15:45,954 INFO L512 BasicCegarLoop]: trace histogram [17, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:15:45,991 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-13 00:15:46,179 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-13 00:15:46,180 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:15:46,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:15:46,180 INFO L82 PathProgramCache]: Analyzing trace with hash 807120147, now seen corresponding path program 17 times [2021-10-13 00:15:46,180 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:15:46,180 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901102697] [2021-10-13 00:15:46,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:15:46,181 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:15:46,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:15:46,391 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:46,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:15:46,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901102697] [2021-10-13 00:15:46,392 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901102697] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:15:46,392 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109352199] [2021-10-13 00:15:46,392 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 00:15:46,392 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:15:46,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:15:46,393 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:15:46,410 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-13 00:15:46,525 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-10-13 00:15:46,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:15:46,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-13 00:15:46,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:15:46,610 INFO L134 CoverageAnalysis]: Checked inductivity of 153 backedges. 0 proven. 153 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:46,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109352199] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:15:46,610 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:15:46,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2021-10-13 00:15:46,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25692261] [2021-10-13 00:15:46,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-13 00:15:46,612 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:15:46,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-13 00:15:46,613 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-10-13 00:15:46,613 INFO L87 Difference]: Start difference. First operand 25 states and 25 transitions. Second operand has 20 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:15:46,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:15:46,644 INFO L93 Difference]: Finished difference Result 30 states and 30 transitions. [2021-10-13 00:15:46,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-13 00:15:46,644 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 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 [2021-10-13 00:15:46,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:15:46,645 INFO L225 Difference]: With dead ends: 30 [2021-10-13 00:15:46,645 INFO L226 Difference]: Without dead ends: 26 [2021-10-13 00:15:46,646 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 148.7ms TimeCoverageRelationStatistics Valid=190, Invalid=190, Unknown=0, NotChecked=0, Total=380 [2021-10-13 00:15:46,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2021-10-13 00:15:46,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2021-10-13 00:15:46,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.04) internal successors, (26), 25 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:15:46,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 26 transitions. [2021-10-13 00:15:46,649 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 26 transitions. Word has length 24 [2021-10-13 00:15:46,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:15:46,650 INFO L470 AbstractCegarLoop]: Abstraction has 26 states and 26 transitions. [2021-10-13 00:15:46,650 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.2) internal successors, (24), 20 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:15:46,650 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 26 transitions. [2021-10-13 00:15:46,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-10-13 00:15:46,651 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:15:46,651 INFO L512 BasicCegarLoop]: trace histogram [18, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:15:46,689 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-13 00:15:46,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:15:46,876 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:15:46,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:15:46,876 INFO L82 PathProgramCache]: Analyzing trace with hash -747413813, now seen corresponding path program 18 times [2021-10-13 00:15:46,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:15:46,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365815557] [2021-10-13 00:15:46,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:15:46,877 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:15:46,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:15:47,103 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:47,103 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:15:47,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365815557] [2021-10-13 00:15:47,103 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365815557] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:15:47,103 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077730429] [2021-10-13 00:15:47,103 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 00:15:47,103 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:15:47,103 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:15:47,105 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:15:47,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-13 00:15:47,233 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2021-10-13 00:15:47,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:15:47,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 20 conjunts are in the unsatisfiable core [2021-10-13 00:15:47,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:15:47,335 INFO L134 CoverageAnalysis]: Checked inductivity of 171 backedges. 0 proven. 171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:47,336 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077730429] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:15:47,336 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:15:47,336 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2021-10-13 00:15:47,336 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382182657] [2021-10-13 00:15:47,337 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-13 00:15:47,337 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:15:47,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-13 00:15:47,338 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-10-13 00:15:47,338 INFO L87 Difference]: Start difference. First operand 26 states and 26 transitions. Second operand has 21 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 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) [2021-10-13 00:15:47,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:15:47,367 INFO L93 Difference]: Finished difference Result 31 states and 31 transitions. [2021-10-13 00:15:47,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-13 00:15:47,368 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-10-13 00:15:47,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:15:47,369 INFO L225 Difference]: With dead ends: 31 [2021-10-13 00:15:47,369 INFO L226 Difference]: Without dead ends: 27 [2021-10-13 00:15:47,369 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 153.9ms TimeCoverageRelationStatistics Valid=210, Invalid=210, Unknown=0, NotChecked=0, Total=420 [2021-10-13 00:15:47,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-10-13 00:15:47,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-10-13 00:15:47,372 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) [2021-10-13 00:15:47,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 27 transitions. [2021-10-13 00:15:47,384 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 27 transitions. Word has length 25 [2021-10-13 00:15:47,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:15:47,384 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 27 transitions. [2021-10-13 00:15:47,385 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 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) [2021-10-13 00:15:47,385 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 27 transitions. [2021-10-13 00:15:47,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-10-13 00:15:47,385 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:15:47,386 INFO L512 BasicCegarLoop]: trace histogram [19, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:15:47,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-13 00:15:47,599 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:15:47,599 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:15:47,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:15:47,600 INFO L82 PathProgramCache]: Analyzing trace with hash -1693326317, now seen corresponding path program 19 times [2021-10-13 00:15:47,600 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:15:47,600 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1508603362] [2021-10-13 00:15:47,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:15:47,600 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:15:47,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:15:47,818 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:47,818 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:15:47,818 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1508603362] [2021-10-13 00:15:47,818 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1508603362] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:15:47,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [716246889] [2021-10-13 00:15:47,819 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 00:15:47,819 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:15:47,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:15:47,820 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:15:47,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-13 00:15:47,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:15:47,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-13 00:15:47,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:15:48,060 INFO L134 CoverageAnalysis]: Checked inductivity of 190 backedges. 0 proven. 190 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:48,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [716246889] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:15:48,061 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:15:48,061 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2021-10-13 00:15:48,061 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18797540] [2021-10-13 00:15:48,062 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-10-13 00:15:48,062 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:15:48,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-10-13 00:15:48,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-10-13 00:15:48,063 INFO L87 Difference]: Start difference. First operand 27 states and 27 transitions. Second operand has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:15:48,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:15:48,099 INFO L93 Difference]: Finished difference Result 32 states and 32 transitions. [2021-10-13 00:15:48,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-13 00:15:48,100 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 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 [2021-10-13 00:15:48,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:15:48,100 INFO L225 Difference]: With dead ends: 32 [2021-10-13 00:15:48,100 INFO L226 Difference]: Without dead ends: 28 [2021-10-13 00:15:48,101 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 156.1ms TimeCoverageRelationStatistics Valid=231, Invalid=231, Unknown=0, NotChecked=0, Total=462 [2021-10-13 00:15:48,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2021-10-13 00:15:48,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 28. [2021-10-13 00:15:48,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.037037037037037) internal successors, (28), 27 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:15:48,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 28 transitions. [2021-10-13 00:15:48,104 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 28 transitions. Word has length 26 [2021-10-13 00:15:48,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:15:48,105 INFO L470 AbstractCegarLoop]: Abstraction has 28 states and 28 transitions. [2021-10-13 00:15:48,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.1818181818181819) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:15:48,105 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 28 transitions. [2021-10-13 00:15:48,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-13 00:15:48,106 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:15:48,106 INFO L512 BasicCegarLoop]: trace histogram [20, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:15:48,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-13 00:15:48,319 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:15:48,320 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:15:48,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:15:48,320 INFO L82 PathProgramCache]: Analyzing trace with hash -951842869, now seen corresponding path program 20 times [2021-10-13 00:15:48,320 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:15:48,320 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737284897] [2021-10-13 00:15:48,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:15:48,320 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:15:48,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:15:48,577 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:48,577 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:15:48,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737284897] [2021-10-13 00:15:48,577 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737284897] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:15:48,577 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1684399322] [2021-10-13 00:15:48,579 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:15:48,580 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:15:48,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:15:48,581 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:15:48,595 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-13 00:15:48,722 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:15:48,722 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:15:48,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-13 00:15:48,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:15:48,842 INFO L134 CoverageAnalysis]: Checked inductivity of 210 backedges. 0 proven. 210 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:48,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1684399322] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:15:48,842 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:15:48,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 23 [2021-10-13 00:15:48,843 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233598428] [2021-10-13 00:15:48,844 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-13 00:15:48,844 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:15:48,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-13 00:15:48,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-10-13 00:15:48,846 INFO L87 Difference]: Start difference. First operand 28 states and 28 transitions. Second operand has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 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) [2021-10-13 00:15:48,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:15:48,869 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2021-10-13 00:15:48,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-13 00:15:48,870 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 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 27 [2021-10-13 00:15:48,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:15:48,871 INFO L225 Difference]: With dead ends: 33 [2021-10-13 00:15:48,871 INFO L226 Difference]: Without dead ends: 29 [2021-10-13 00:15:48,872 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 178.8ms TimeCoverageRelationStatistics Valid=253, Invalid=253, Unknown=0, NotChecked=0, Total=506 [2021-10-13 00:15:48,872 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2021-10-13 00:15:48,884 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 29. [2021-10-13 00:15:48,886 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) [2021-10-13 00:15:48,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 29 transitions. [2021-10-13 00:15:48,886 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 29 transitions. Word has length 27 [2021-10-13 00:15:48,887 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:15:48,887 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 29 transitions. [2021-10-13 00:15:48,887 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.173913043478261) internal successors, (27), 23 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) [2021-10-13 00:15:48,887 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 29 transitions. [2021-10-13 00:15:48,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-13 00:15:48,890 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:15:48,890 INFO L512 BasicCegarLoop]: trace histogram [21, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:15:48,927 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-10-13 00:15:49,103 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:15:49,104 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:15:49,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:15:49,104 INFO L82 PathProgramCache]: Analyzing trace with hash 559307539, now seen corresponding path program 21 times [2021-10-13 00:15:49,104 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:15:49,104 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668454894] [2021-10-13 00:15:49,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:15:49,104 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:15:49,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:15:49,370 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:49,371 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:15:49,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668454894] [2021-10-13 00:15:49,371 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1668454894] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:15:49,371 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486915660] [2021-10-13 00:15:49,371 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 00:15:49,371 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:15:49,371 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:15:49,372 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:15:49,373 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-13 00:15:49,525 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2021-10-13 00:15:49,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:15:49,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-13 00:15:49,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:15:49,634 INFO L134 CoverageAnalysis]: Checked inductivity of 231 backedges. 0 proven. 231 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:49,635 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [486915660] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:15:49,635 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:15:49,635 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 24 [2021-10-13 00:15:49,635 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975886487] [2021-10-13 00:15:49,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-13 00:15:49,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:15:49,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-13 00:15:49,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-10-13 00:15:49,637 INFO L87 Difference]: Start difference. First operand 29 states and 29 transitions. Second operand has 24 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:15:49,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:15:49,669 INFO L93 Difference]: Finished difference Result 34 states and 34 transitions. [2021-10-13 00:15:49,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-13 00:15:49,669 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-10-13 00:15:49,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:15:49,670 INFO L225 Difference]: With dead ends: 34 [2021-10-13 00:15:49,670 INFO L226 Difference]: Without dead ends: 30 [2021-10-13 00:15:49,671 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 191.8ms TimeCoverageRelationStatistics Valid=276, Invalid=276, Unknown=0, NotChecked=0, Total=552 [2021-10-13 00:15:49,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2021-10-13 00:15:49,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2021-10-13 00:15:49,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.0344827586206897) internal successors, (30), 29 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:15:49,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 30 transitions. [2021-10-13 00:15:49,674 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 30 transitions. Word has length 28 [2021-10-13 00:15:49,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:15:49,674 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 30 transitions. [2021-10-13 00:15:49,674 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.1666666666666667) internal successors, (28), 24 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:15:49,675 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 30 transitions. [2021-10-13 00:15:49,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-10-13 00:15:49,675 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:15:49,675 INFO L512 BasicCegarLoop]: trace histogram [22, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:15:49,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-13 00:15:49,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-13 00:15:49,892 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:15:49,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:15:49,892 INFO L82 PathProgramCache]: Analyzing trace with hash 160329931, now seen corresponding path program 22 times [2021-10-13 00:15:49,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:15:49,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410787728] [2021-10-13 00:15:49,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:15:49,892 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:15:49,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:15:50,182 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:50,183 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:15:50,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410787728] [2021-10-13 00:15:50,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410787728] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:15:50,183 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955403758] [2021-10-13 00:15:50,183 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 00:15:50,184 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:15:50,184 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:15:50,185 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:15:50,202 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-13 00:15:50,343 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 00:15:50,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:15:50,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-13 00:15:50,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:15:50,432 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 0 proven. 253 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:50,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [955403758] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:15:50,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:15:50,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 25 [2021-10-13 00:15:50,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [801364843] [2021-10-13 00:15:50,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-13 00:15:50,433 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:15:50,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-13 00:15:50,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-10-13 00:15:50,435 INFO L87 Difference]: Start difference. First operand 30 states and 30 transitions. Second operand has 25 states, 25 states have (on average 1.16) internal successors, (29), 25 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) [2021-10-13 00:15:50,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:15:50,459 INFO L93 Difference]: Finished difference Result 35 states and 35 transitions. [2021-10-13 00:15:50,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-13 00:15:50,460 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.16) internal successors, (29), 25 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 29 [2021-10-13 00:15:50,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:15:50,461 INFO L225 Difference]: With dead ends: 35 [2021-10-13 00:15:50,461 INFO L226 Difference]: Without dead ends: 31 [2021-10-13 00:15:50,461 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 225.0ms TimeCoverageRelationStatistics Valid=300, Invalid=300, Unknown=0, NotChecked=0, Total=600 [2021-10-13 00:15:50,462 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2021-10-13 00:15:50,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2021-10-13 00:15:50,464 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) [2021-10-13 00:15:50,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2021-10-13 00:15:50,465 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 29 [2021-10-13 00:15:50,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:15:50,465 INFO L470 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2021-10-13 00:15:50,465 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.16) internal successors, (29), 25 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) [2021-10-13 00:15:50,465 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2021-10-13 00:15:50,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-10-13 00:15:50,466 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:15:50,466 INFO L512 BasicCegarLoop]: trace histogram [23, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:15:50,494 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-13 00:15:50,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-13 00:15:50,688 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:15:50,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:15:50,688 INFO L82 PathProgramCache]: Analyzing trace with hash 676925971, now seen corresponding path program 23 times [2021-10-13 00:15:50,688 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:15:50,688 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929095923] [2021-10-13 00:15:50,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:15:50,688 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:15:50,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:15:50,987 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:50,987 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:15:50,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929095923] [2021-10-13 00:15:50,988 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [929095923] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:15:50,988 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89460928] [2021-10-13 00:15:50,988 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 00:15:50,988 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:15:50,988 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:15:50,989 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:15:51,010 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-13 00:15:51,185 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2021-10-13 00:15:51,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:15:51,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-13 00:15:51,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:15:51,323 INFO L134 CoverageAnalysis]: Checked inductivity of 276 backedges. 0 proven. 276 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:51,323 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89460928] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:15:51,323 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:15:51,324 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 26 [2021-10-13 00:15:51,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007685414] [2021-10-13 00:15:51,324 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-13 00:15:51,324 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:15:51,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-13 00:15:51,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-10-13 00:15:51,326 INFO L87 Difference]: Start difference. First operand 31 states and 31 transitions. Second operand has 26 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:15:51,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:15:51,351 INFO L93 Difference]: Finished difference Result 36 states and 36 transitions. [2021-10-13 00:15:51,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-10-13 00:15:51,352 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-10-13 00:15:51,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:15:51,352 INFO L225 Difference]: With dead ends: 36 [2021-10-13 00:15:51,353 INFO L226 Difference]: Without dead ends: 32 [2021-10-13 00:15:51,353 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 221.6ms TimeCoverageRelationStatistics Valid=325, Invalid=325, Unknown=0, NotChecked=0, Total=650 [2021-10-13 00:15:51,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-13 00:15:51,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2021-10-13 00:15:51,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.032258064516129) internal successors, (32), 31 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:15:51,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 32 transitions. [2021-10-13 00:15:51,360 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 32 transitions. Word has length 30 [2021-10-13 00:15:51,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:15:51,360 INFO L470 AbstractCegarLoop]: Abstraction has 32 states and 32 transitions. [2021-10-13 00:15:51,361 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.1538461538461537) internal successors, (30), 26 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:15:51,361 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 32 transitions. [2021-10-13 00:15:51,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-13 00:15:51,361 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:15:51,361 INFO L512 BasicCegarLoop]: trace histogram [24, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:15:51,400 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-13 00:15:51,576 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-10-13 00:15:51,577 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:15:51,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:15:51,577 INFO L82 PathProgramCache]: Analyzing trace with hash -488465973, now seen corresponding path program 24 times [2021-10-13 00:15:51,577 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:15:51,577 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411973135] [2021-10-13 00:15:51,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:15:51,577 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:15:51,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:15:51,916 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:51,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:15:51,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411973135] [2021-10-13 00:15:51,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411973135] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:15:51,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170842382] [2021-10-13 00:15:51,916 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 00:15:51,916 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:15:51,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:15:51,918 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:15:51,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-13 00:15:52,102 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2021-10-13 00:15:52,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:15:52,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 26 conjunts are in the unsatisfiable core [2021-10-13 00:15:52,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:15:52,196 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 0 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:52,197 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1170842382] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:15:52,197 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:15:52,197 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 27] total 27 [2021-10-13 00:15:52,197 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653571530] [2021-10-13 00:15:52,198 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-13 00:15:52,198 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:15:52,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-13 00:15:52,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-10-13 00:15:52,200 INFO L87 Difference]: Start difference. First operand 32 states and 32 transitions. Second operand has 27 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 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) [2021-10-13 00:15:52,230 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:15:52,230 INFO L93 Difference]: Finished difference Result 37 states and 37 transitions. [2021-10-13 00:15:52,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-13 00:15:52,231 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 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 31 [2021-10-13 00:15:52,231 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:15:52,231 INFO L225 Difference]: With dead ends: 37 [2021-10-13 00:15:52,232 INFO L226 Difference]: Without dead ends: 33 [2021-10-13 00:15:52,232 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 257.8ms TimeCoverageRelationStatistics Valid=351, Invalid=351, Unknown=0, NotChecked=0, Total=702 [2021-10-13 00:15:52,233 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2021-10-13 00:15:52,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 33. [2021-10-13 00:15:52,248 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) [2021-10-13 00:15:52,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 33 transitions. [2021-10-13 00:15:52,249 INFO L78 Accepts]: Start accepts. Automaton has 33 states and 33 transitions. Word has length 31 [2021-10-13 00:15:52,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:15:52,250 INFO L470 AbstractCegarLoop]: Abstraction has 33 states and 33 transitions. [2021-10-13 00:15:52,250 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.1481481481481481) internal successors, (31), 27 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) [2021-10-13 00:15:52,250 INFO L276 IsEmpty]: Start isEmpty. Operand 33 states and 33 transitions. [2021-10-13 00:15:52,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-10-13 00:15:52,251 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:15:52,251 INFO L512 BasicCegarLoop]: trace histogram [25, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:15:52,286 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-13 00:15:52,467 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-13 00:15:52,468 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:15:52,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:15:52,468 INFO L82 PathProgramCache]: Analyzing trace with hash 2039089427, now seen corresponding path program 25 times [2021-10-13 00:15:52,468 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:15:52,468 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242603162] [2021-10-13 00:15:52,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:15:52,468 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:15:52,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:15:52,830 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:52,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:15:52,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242603162] [2021-10-13 00:15:52,831 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [242603162] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:15:52,831 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805818910] [2021-10-13 00:15:52,831 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 00:15:52,831 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:15:52,831 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:15:52,832 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:15:52,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-13 00:15:53,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:15:53,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 27 conjunts are in the unsatisfiable core [2021-10-13 00:15:53,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:15:53,144 INFO L134 CoverageAnalysis]: Checked inductivity of 325 backedges. 0 proven. 325 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:53,144 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805818910] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:15:53,144 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:15:53,144 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 28 [2021-10-13 00:15:53,144 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738999551] [2021-10-13 00:15:53,145 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-10-13 00:15:53,145 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:15:53,146 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-10-13 00:15:53,146 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-10-13 00:15:53,146 INFO L87 Difference]: Start difference. First operand 33 states and 33 transitions. Second operand has 28 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:15:53,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:15:53,178 INFO L93 Difference]: Finished difference Result 38 states and 38 transitions. [2021-10-13 00:15:53,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-13 00:15:53,179 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-10-13 00:15:53,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:15:53,179 INFO L225 Difference]: With dead ends: 38 [2021-10-13 00:15:53,179 INFO L226 Difference]: Without dead ends: 34 [2021-10-13 00:15:53,180 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 295.2ms TimeCoverageRelationStatistics Valid=378, Invalid=378, Unknown=0, NotChecked=0, Total=756 [2021-10-13 00:15:53,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2021-10-13 00:15:53,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2021-10-13 00:15:53,182 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0303030303030303) internal successors, (34), 33 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:15:53,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 34 transitions. [2021-10-13 00:15:53,183 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 34 transitions. Word has length 32 [2021-10-13 00:15:53,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:15:53,183 INFO L470 AbstractCegarLoop]: Abstraction has 34 states and 34 transitions. [2021-10-13 00:15:53,184 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.1428571428571428) internal successors, (32), 28 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:15:53,184 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 34 transitions. [2021-10-13 00:15:53,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-10-13 00:15:53,184 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:15:53,184 INFO L512 BasicCegarLoop]: trace histogram [26, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:15:53,216 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-13 00:15:53,411 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-13 00:15:53,412 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:15:53,412 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:15:53,412 INFO L82 PathProgramCache]: Analyzing trace with hash -1211071797, now seen corresponding path program 26 times [2021-10-13 00:15:53,412 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:15:53,412 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424413040] [2021-10-13 00:15:53,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:15:53,412 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:15:53,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:15:53,780 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:53,780 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:15:53,780 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424413040] [2021-10-13 00:15:53,780 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424413040] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:15:53,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527710940] [2021-10-13 00:15:53,781 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:15:53,781 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:15:53,781 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:15:53,782 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:15:53,798 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-13 00:15:53,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:15:53,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:15:53,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-13 00:15:53,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:15:54,098 INFO L134 CoverageAnalysis]: Checked inductivity of 351 backedges. 0 proven. 351 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:54,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527710940] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:15:54,099 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:15:54,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29] total 29 [2021-10-13 00:15:54,099 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827200786] [2021-10-13 00:15:54,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-13 00:15:54,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:15:54,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-13 00:15:54,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-10-13 00:15:54,102 INFO L87 Difference]: Start difference. First operand 34 states and 34 transitions. Second operand has 29 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 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) [2021-10-13 00:15:54,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:15:54,129 INFO L93 Difference]: Finished difference Result 39 states and 39 transitions. [2021-10-13 00:15:54,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-10-13 00:15:54,129 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 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 33 [2021-10-13 00:15:54,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:15:54,130 INFO L225 Difference]: With dead ends: 39 [2021-10-13 00:15:54,130 INFO L226 Difference]: Without dead ends: 35 [2021-10-13 00:15:54,131 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 294.2ms TimeCoverageRelationStatistics Valid=406, Invalid=406, Unknown=0, NotChecked=0, Total=812 [2021-10-13 00:15:54,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2021-10-13 00:15:54,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2021-10-13 00:15:54,133 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) [2021-10-13 00:15:54,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 35 transitions. [2021-10-13 00:15:54,133 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 35 transitions. Word has length 33 [2021-10-13 00:15:54,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:15:54,134 INFO L470 AbstractCegarLoop]: Abstraction has 35 states and 35 transitions. [2021-10-13 00:15:54,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.1379310344827587) internal successors, (33), 29 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) [2021-10-13 00:15:54,142 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 35 transitions. [2021-10-13 00:15:54,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-13 00:15:54,143 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:15:54,143 INFO L512 BasicCegarLoop]: trace histogram [27, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:15:54,177 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-10-13 00:15:54,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:15:54,364 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:15:54,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:15:54,364 INFO L82 PathProgramCache]: Analyzing trace with hash 1113145363, now seen corresponding path program 27 times [2021-10-13 00:15:54,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:15:54,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40399847] [2021-10-13 00:15:54,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:15:54,365 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:15:54,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:15:54,762 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:54,762 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:15:54,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40399847] [2021-10-13 00:15:54,762 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [40399847] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:15:54,762 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1689794828] [2021-10-13 00:15:54,762 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 00:15:54,763 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:15:54,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:15:54,764 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:15:54,779 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-13 00:15:55,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2021-10-13 00:15:55,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:15:55,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-13 00:15:55,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:15:55,120 INFO L134 CoverageAnalysis]: Checked inductivity of 378 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:55,120 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1689794828] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:15:55,120 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:15:55,121 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 30 [2021-10-13 00:15:55,121 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955394986] [2021-10-13 00:15:55,121 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-13 00:15:55,121 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:15:55,122 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-13 00:15:55,122 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-10-13 00:15:55,123 INFO L87 Difference]: Start difference. First operand 35 states and 35 transitions. Second operand has 30 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:15:55,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:15:55,154 INFO L93 Difference]: Finished difference Result 40 states and 40 transitions. [2021-10-13 00:15:55,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-10-13 00:15:55,155 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2021-10-13 00:15:55,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:15:55,156 INFO L225 Difference]: With dead ends: 40 [2021-10-13 00:15:55,156 INFO L226 Difference]: Without dead ends: 36 [2021-10-13 00:15:55,158 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 310.0ms TimeCoverageRelationStatistics Valid=435, Invalid=435, Unknown=0, NotChecked=0, Total=870 [2021-10-13 00:15:55,158 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-13 00:15:55,160 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-10-13 00:15:55,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0285714285714285) internal successors, (36), 35 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:15:55,161 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 36 transitions. [2021-10-13 00:15:55,161 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 36 transitions. Word has length 34 [2021-10-13 00:15:55,162 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:15:55,162 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 36 transitions. [2021-10-13 00:15:55,162 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.1333333333333333) internal successors, (34), 30 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:15:55,162 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 36 transitions. [2021-10-13 00:15:55,162 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-10-13 00:15:55,163 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:15:55,163 INFO L512 BasicCegarLoop]: trace histogram [28, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:15:55,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-13 00:15:55,378 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-13 00:15:55,378 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:15:55,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:15:55,378 INFO L82 PathProgramCache]: Analyzing trace with hash 149433291, now seen corresponding path program 28 times [2021-10-13 00:15:55,379 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:15:55,379 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545420838] [2021-10-13 00:15:55,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:15:55,379 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:15:55,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:15:55,824 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:55,824 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:15:55,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545420838] [2021-10-13 00:15:55,825 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545420838] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:15:55,825 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29309284] [2021-10-13 00:15:55,825 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 00:15:55,825 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:15:55,825 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:15:55,826 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:15:55,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-13 00:15:56,036 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 00:15:56,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:15:56,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-13 00:15:56,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:15:56,183 INFO L134 CoverageAnalysis]: Checked inductivity of 406 backedges. 0 proven. 406 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:56,183 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29309284] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:15:56,183 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:15:56,184 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 31 [2021-10-13 00:15:56,184 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001540862] [2021-10-13 00:15:56,184 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-13 00:15:56,184 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:15:56,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-13 00:15:56,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-10-13 00:15:56,186 INFO L87 Difference]: Start difference. First operand 36 states and 36 transitions. Second operand has 31 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 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) [2021-10-13 00:15:56,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:15:56,226 INFO L93 Difference]: Finished difference Result 41 states and 41 transitions. [2021-10-13 00:15:56,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-10-13 00:15:56,227 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 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 35 [2021-10-13 00:15:56,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:15:56,228 INFO L225 Difference]: With dead ends: 41 [2021-10-13 00:15:56,228 INFO L226 Difference]: Without dead ends: 37 [2021-10-13 00:15:56,230 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 365.1ms TimeCoverageRelationStatistics Valid=465, Invalid=465, Unknown=0, NotChecked=0, Total=930 [2021-10-13 00:15:56,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-10-13 00:15:56,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 37. [2021-10-13 00:15:56,241 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) [2021-10-13 00:15:56,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 37 transitions. [2021-10-13 00:15:56,242 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 37 transitions. Word has length 35 [2021-10-13 00:15:56,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:15:56,242 INFO L470 AbstractCegarLoop]: Abstraction has 37 states and 37 transitions. [2021-10-13 00:15:56,242 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.1290322580645162) internal successors, (35), 31 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) [2021-10-13 00:15:56,242 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 37 transitions. [2021-10-13 00:15:56,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-10-13 00:15:56,244 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:15:56,244 INFO L512 BasicCegarLoop]: trace histogram [29, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:15:56,287 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-10-13 00:15:56,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:15:56,460 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:15:56,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:15:56,460 INFO L82 PathProgramCache]: Analyzing trace with hash 339130131, now seen corresponding path program 29 times [2021-10-13 00:15:56,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:15:56,460 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338195679] [2021-10-13 00:15:56,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:15:56,460 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:15:56,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:15:56,926 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:56,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:15:56,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338195679] [2021-10-13 00:15:56,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338195679] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:15:56,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649598670] [2021-10-13 00:15:56,927 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 00:15:56,927 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:15:56,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:15:56,932 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:15:56,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-13 00:15:57,199 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2021-10-13 00:15:57,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:15:57,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 190 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-13 00:15:57,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:15:57,305 INFO L134 CoverageAnalysis]: Checked inductivity of 435 backedges. 0 proven. 435 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:57,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649598670] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:15:57,306 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:15:57,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 32 [2021-10-13 00:15:57,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1659374775] [2021-10-13 00:15:57,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-10-13 00:15:57,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:15:57,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-10-13 00:15:57,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-10-13 00:15:57,308 INFO L87 Difference]: Start difference. First operand 37 states and 37 transitions. Second operand has 32 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:15:57,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:15:57,337 INFO L93 Difference]: Finished difference Result 42 states and 42 transitions. [2021-10-13 00:15:57,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-10-13 00:15:57,338 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 0 states have call successors, (0), 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 [2021-10-13 00:15:57,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:15:57,338 INFO L225 Difference]: With dead ends: 42 [2021-10-13 00:15:57,339 INFO L226 Difference]: Without dead ends: 38 [2021-10-13 00:15:57,339 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 380.9ms TimeCoverageRelationStatistics Valid=496, Invalid=496, Unknown=0, NotChecked=0, Total=992 [2021-10-13 00:15:57,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2021-10-13 00:15:57,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2021-10-13 00:15:57,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.027027027027027) internal successors, (38), 37 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:15:57,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 38 transitions. [2021-10-13 00:15:57,342 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 38 transitions. Word has length 36 [2021-10-13 00:15:57,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:15:57,342 INFO L470 AbstractCegarLoop]: Abstraction has 38 states and 38 transitions. [2021-10-13 00:15:57,342 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.125) internal successors, (36), 32 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:15:57,342 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 38 transitions. [2021-10-13 00:15:57,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-13 00:15:57,343 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:15:57,343 INFO L512 BasicCegarLoop]: trace histogram [30, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:15:57,385 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-10-13 00:15:57,563 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:15:57,564 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:15:57,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:15:57,564 INFO L82 PathProgramCache]: Analyzing trace with hash 1924764875, now seen corresponding path program 30 times [2021-10-13 00:15:57,564 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:15:57,564 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420158032] [2021-10-13 00:15:57,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:15:57,564 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:15:57,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:15:58,025 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:58,025 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:15:58,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420158032] [2021-10-13 00:15:58,025 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1420158032] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:15:58,025 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1308850792] [2021-10-13 00:15:58,026 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 00:15:58,026 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:15:58,026 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:15:58,027 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:15:58,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-13 00:15:58,291 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 16 check-sat command(s) [2021-10-13 00:15:58,291 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:15:58,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 32 conjunts are in the unsatisfiable core [2021-10-13 00:15:58,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:15:58,432 INFO L134 CoverageAnalysis]: Checked inductivity of 465 backedges. 0 proven. 465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:58,432 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1308850792] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:15:58,433 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:15:58,433 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33] total 33 [2021-10-13 00:15:58,433 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188591602] [2021-10-13 00:15:58,433 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-13 00:15:58,434 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:15:58,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-13 00:15:58,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-10-13 00:15:58,435 INFO L87 Difference]: Start difference. First operand 38 states and 38 transitions. Second operand has 33 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 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) [2021-10-13 00:15:58,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:15:58,474 INFO L93 Difference]: Finished difference Result 43 states and 43 transitions. [2021-10-13 00:15:58,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-10-13 00:15:58,474 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 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 37 [2021-10-13 00:15:58,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:15:58,475 INFO L225 Difference]: With dead ends: 43 [2021-10-13 00:15:58,475 INFO L226 Difference]: Without dead ends: 39 [2021-10-13 00:15:58,476 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 387.7ms TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2021-10-13 00:15:58,476 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2021-10-13 00:15:58,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 39. [2021-10-13 00:15:58,482 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) [2021-10-13 00:15:58,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 39 transitions. [2021-10-13 00:15:58,483 INFO L78 Accepts]: Start accepts. Automaton has 39 states and 39 transitions. Word has length 37 [2021-10-13 00:15:58,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:15:58,484 INFO L470 AbstractCegarLoop]: Abstraction has 39 states and 39 transitions. [2021-10-13 00:15:58,484 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.121212121212121) internal successors, (37), 33 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) [2021-10-13 00:15:58,484 INFO L276 IsEmpty]: Start isEmpty. Operand 39 states and 39 transitions. [2021-10-13 00:15:58,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-10-13 00:15:58,484 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:15:58,485 INFO L512 BasicCegarLoop]: trace histogram [31, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:15:58,522 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-13 00:15:58,707 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-10-13 00:15:58,708 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:15:58,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:15:58,708 INFO L82 PathProgramCache]: Analyzing trace with hash -460165613, now seen corresponding path program 31 times [2021-10-13 00:15:58,708 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:15:58,708 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [280005861] [2021-10-13 00:15:58,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:15:58,708 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:15:58,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:15:59,189 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:59,189 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:15:59,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [280005861] [2021-10-13 00:15:59,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [280005861] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:15:59,189 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974195797] [2021-10-13 00:15:59,189 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 00:15:59,189 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:15:59,190 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:15:59,191 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:15:59,215 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-13 00:15:59,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:15:59,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-13 00:15:59,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:15:59,610 INFO L134 CoverageAnalysis]: Checked inductivity of 496 backedges. 0 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:15:59,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974195797] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:15:59,611 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:15:59,611 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34] total 34 [2021-10-13 00:15:59,611 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648921337] [2021-10-13 00:15:59,612 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-10-13 00:15:59,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:15:59,613 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-10-13 00:15:59,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-10-13 00:15:59,614 INFO L87 Difference]: Start difference. First operand 39 states and 39 transitions. Second operand has 34 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:15:59,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:15:59,645 INFO L93 Difference]: Finished difference Result 44 states and 44 transitions. [2021-10-13 00:15:59,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-13 00:15:59,646 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 0 states have call successors, (0), 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 [2021-10-13 00:15:59,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:15:59,647 INFO L225 Difference]: With dead ends: 44 [2021-10-13 00:15:59,647 INFO L226 Difference]: Without dead ends: 40 [2021-10-13 00:15:59,648 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 400.5ms TimeCoverageRelationStatistics Valid=561, Invalid=561, Unknown=0, NotChecked=0, Total=1122 [2021-10-13 00:15:59,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2021-10-13 00:15:59,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2021-10-13 00:15:59,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0256410256410255) internal successors, (40), 39 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:15:59,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 40 transitions. [2021-10-13 00:15:59,652 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 40 transitions. Word has length 38 [2021-10-13 00:15:59,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:15:59,652 INFO L470 AbstractCegarLoop]: Abstraction has 40 states and 40 transitions. [2021-10-13 00:15:59,652 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.1176470588235294) internal successors, (38), 34 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:15:59,652 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 40 transitions. [2021-10-13 00:15:59,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-10-13 00:15:59,653 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:15:59,653 INFO L512 BasicCegarLoop]: trace histogram [32, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:15:59,691 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-10-13 00:15:59,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2021-10-13 00:15:59,866 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:15:59,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:15:59,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1378566709, now seen corresponding path program 32 times [2021-10-13 00:15:59,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:15:59,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [16238773] [2021-10-13 00:15:59,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:15:59,867 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:15:59,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:16:00,442 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:00,442 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:16:00,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [16238773] [2021-10-13 00:16:00,442 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [16238773] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:16:00,442 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835401291] [2021-10-13 00:16:00,442 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:16:00,442 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:16:00,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:16:00,448 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:16:00,463 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-10-13 00:16:00,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:16:00,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:16:00,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-13 00:16:00,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:16:00,850 INFO L134 CoverageAnalysis]: Checked inductivity of 528 backedges. 0 proven. 528 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:00,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [835401291] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:16:00,850 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:16:00,850 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 35 [2021-10-13 00:16:00,851 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2147090023] [2021-10-13 00:16:00,851 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-13 00:16:00,851 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:16:00,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-13 00:16:00,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-10-13 00:16:00,853 INFO L87 Difference]: Start difference. First operand 40 states and 40 transitions. Second operand has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 35 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) [2021-10-13 00:16:00,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:16:00,884 INFO L93 Difference]: Finished difference Result 45 states and 45 transitions. [2021-10-13 00:16:00,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-10-13 00:16:00,885 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 35 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 39 [2021-10-13 00:16:00,885 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:16:00,885 INFO L225 Difference]: With dead ends: 45 [2021-10-13 00:16:00,886 INFO L226 Difference]: Without dead ends: 41 [2021-10-13 00:16:00,886 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 469.4ms TimeCoverageRelationStatistics Valid=595, Invalid=595, Unknown=0, NotChecked=0, Total=1190 [2021-10-13 00:16:00,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-10-13 00:16:00,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 41. [2021-10-13 00:16:00,888 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) [2021-10-13 00:16:00,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 41 transitions. [2021-10-13 00:16:00,889 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 41 transitions. Word has length 39 [2021-10-13 00:16:00,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:16:00,889 INFO L470 AbstractCegarLoop]: Abstraction has 41 states and 41 transitions. [2021-10-13 00:16:00,889 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.1142857142857143) internal successors, (39), 35 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) [2021-10-13 00:16:00,890 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 41 transitions. [2021-10-13 00:16:00,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-13 00:16:00,890 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:16:00,890 INFO L512 BasicCegarLoop]: trace histogram [33, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:16:00,929 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-10-13 00:16:01,115 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-10-13 00:16:01,116 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:16:01,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:16:01,116 INFO L82 PathProgramCache]: Analyzing trace with hash 215770387, now seen corresponding path program 33 times [2021-10-13 00:16:01,116 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:16:01,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770428946] [2021-10-13 00:16:01,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:16:01,117 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:16:01,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:16:01,626 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:01,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:16:01,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770428946] [2021-10-13 00:16:01,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770428946] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:16:01,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825623785] [2021-10-13 00:16:01,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 00:16:01,627 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:16:01,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:16:01,632 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:16:01,633 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-10-13 00:16:01,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2021-10-13 00:16:01,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:16:01,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 35 conjunts are in the unsatisfiable core [2021-10-13 00:16:01,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:16:02,089 INFO L134 CoverageAnalysis]: Checked inductivity of 561 backedges. 0 proven. 561 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:02,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825623785] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:16:02,089 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:16:02,089 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 36 [2021-10-13 00:16:02,089 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937635533] [2021-10-13 00:16:02,089 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-13 00:16:02,090 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:16:02,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-13 00:16:02,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-10-13 00:16:02,091 INFO L87 Difference]: Start difference. First operand 41 states and 41 transitions. Second operand has 36 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 36 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:16:02,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:16:02,147 INFO L93 Difference]: Finished difference Result 46 states and 46 transitions. [2021-10-13 00:16:02,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-10-13 00:16:02,148 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 36 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-10-13 00:16:02,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:16:02,148 INFO L225 Difference]: With dead ends: 46 [2021-10-13 00:16:02,148 INFO L226 Difference]: Without dead ends: 42 [2021-10-13 00:16:02,149 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 430.1ms TimeCoverageRelationStatistics Valid=630, Invalid=630, Unknown=0, NotChecked=0, Total=1260 [2021-10-13 00:16:02,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-13 00:16:02,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-10-13 00:16:02,151 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.024390243902439) internal successors, (42), 41 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:16:02,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 42 transitions. [2021-10-13 00:16:02,151 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 42 transitions. Word has length 40 [2021-10-13 00:16:02,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:16:02,151 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 42 transitions. [2021-10-13 00:16:02,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.1111111111111112) internal successors, (40), 36 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:16:02,152 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 42 transitions. [2021-10-13 00:16:02,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-10-13 00:16:02,152 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:16:02,152 INFO L512 BasicCegarLoop]: trace histogram [34, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:16:02,190 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-10-13 00:16:02,363 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:16:02,364 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:16:02,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:16:02,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1899387189, now seen corresponding path program 34 times [2021-10-13 00:16:02,364 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:16:02,364 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958805784] [2021-10-13 00:16:02,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:16:02,364 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:16:02,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:16:02,945 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:02,945 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:16:02,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958805784] [2021-10-13 00:16:02,946 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958805784] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:16:02,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985972903] [2021-10-13 00:16:02,946 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 00:16:02,946 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:16:02,946 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:16:02,952 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:16:02,979 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-10-13 00:16:03,253 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 00:16:03,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:16:03,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 36 conjunts are in the unsatisfiable core [2021-10-13 00:16:03,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:16:03,359 INFO L134 CoverageAnalysis]: Checked inductivity of 595 backedges. 0 proven. 595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:03,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985972903] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:16:03,360 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:16:03,360 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37] total 37 [2021-10-13 00:16:03,360 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1412505162] [2021-10-13 00:16:03,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-13 00:16:03,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:16:03,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-13 00:16:03,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-10-13 00:16:03,362 INFO L87 Difference]: Start difference. First operand 42 states and 42 transitions. Second operand has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 37 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) [2021-10-13 00:16:03,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:16:03,396 INFO L93 Difference]: Finished difference Result 47 states and 47 transitions. [2021-10-13 00:16:03,396 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-10-13 00:16:03,397 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 37 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 41 [2021-10-13 00:16:03,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:16:03,397 INFO L225 Difference]: With dead ends: 47 [2021-10-13 00:16:03,397 INFO L226 Difference]: Without dead ends: 43 [2021-10-13 00:16:03,398 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 497.8ms TimeCoverageRelationStatistics Valid=666, Invalid=666, Unknown=0, NotChecked=0, Total=1332 [2021-10-13 00:16:03,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2021-10-13 00:16:03,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2021-10-13 00:16:03,400 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) [2021-10-13 00:16:03,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 43 transitions. [2021-10-13 00:16:03,401 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 43 transitions. Word has length 41 [2021-10-13 00:16:03,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:16:03,401 INFO L470 AbstractCegarLoop]: Abstraction has 43 states and 43 transitions. [2021-10-13 00:16:03,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.1081081081081081) internal successors, (41), 37 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) [2021-10-13 00:16:03,402 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 43 transitions. [2021-10-13 00:16:03,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-10-13 00:16:03,402 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:16:03,402 INFO L512 BasicCegarLoop]: trace histogram [35, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:16:03,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-10-13 00:16:03,615 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:16:03,616 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:16:03,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:16:03,616 INFO L82 PathProgramCache]: Analyzing trace with hash 1250204691, now seen corresponding path program 35 times [2021-10-13 00:16:03,616 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:16:03,616 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760366439] [2021-10-13 00:16:03,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:16:03,616 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:16:03,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:16:04,140 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:04,140 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:16:04,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760366439] [2021-10-13 00:16:04,140 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760366439] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:16:04,140 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [921044703] [2021-10-13 00:16:04,140 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 00:16:04,140 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:16:04,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:16:04,141 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:16:04,143 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-10-13 00:16:04,449 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2021-10-13 00:16:04,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:16:04,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-13 00:16:04,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:16:04,569 INFO L134 CoverageAnalysis]: Checked inductivity of 630 backedges. 0 proven. 630 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:04,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [921044703] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:16:04,569 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:16:04,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38] total 38 [2021-10-13 00:16:04,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489601390] [2021-10-13 00:16:04,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-10-13 00:16:04,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:16:04,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-10-13 00:16:04,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-10-13 00:16:04,571 INFO L87 Difference]: Start difference. First operand 43 states and 43 transitions. Second operand has 38 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:16:04,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:16:04,620 INFO L93 Difference]: Finished difference Result 48 states and 48 transitions. [2021-10-13 00:16:04,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-10-13 00:16:04,620 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-10-13 00:16:04,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:16:04,621 INFO L225 Difference]: With dead ends: 48 [2021-10-13 00:16:04,621 INFO L226 Difference]: Without dead ends: 44 [2021-10-13 00:16:04,622 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 448.1ms TimeCoverageRelationStatistics Valid=703, Invalid=703, Unknown=0, NotChecked=0, Total=1406 [2021-10-13 00:16:04,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2021-10-13 00:16:04,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2021-10-13 00:16:04,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.0232558139534884) internal successors, (44), 43 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:16:04,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 44 transitions. [2021-10-13 00:16:04,624 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 44 transitions. Word has length 42 [2021-10-13 00:16:04,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:16:04,624 INFO L470 AbstractCegarLoop]: Abstraction has 44 states and 44 transitions. [2021-10-13 00:16:04,625 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.105263157894737) internal successors, (42), 38 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:16:04,625 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 44 transitions. [2021-10-13 00:16:04,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-13 00:16:04,625 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:16:04,625 INFO L512 BasicCegarLoop]: trace histogram [36, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:16:04,654 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-10-13 00:16:04,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:16:04,844 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:16:04,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:16:04,844 INFO L82 PathProgramCache]: Analyzing trace with hash 103305163, now seen corresponding path program 36 times [2021-10-13 00:16:04,844 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:16:04,844 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069533512] [2021-10-13 00:16:04,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:16:04,844 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:16:04,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:16:05,413 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:05,413 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:16:05,413 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069533512] [2021-10-13 00:16:05,414 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069533512] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:16:05,414 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [724989554] [2021-10-13 00:16:05,414 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 00:16:05,414 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:16:05,414 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:16:05,415 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:16:05,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-10-13 00:16:05,741 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 19 check-sat command(s) [2021-10-13 00:16:05,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:16:05,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 225 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-13 00:16:05,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:16:05,869 INFO L134 CoverageAnalysis]: Checked inductivity of 666 backedges. 0 proven. 666 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:05,869 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [724989554] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:16:05,869 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:16:05,869 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39] total 39 [2021-10-13 00:16:05,869 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [135355956] [2021-10-13 00:16:05,870 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-10-13 00:16:05,870 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:16:05,871 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-10-13 00:16:05,871 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-10-13 00:16:05,871 INFO L87 Difference]: Start difference. First operand 44 states and 44 transitions. Second operand has 39 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 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) [2021-10-13 00:16:05,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:16:05,922 INFO L93 Difference]: Finished difference Result 49 states and 49 transitions. [2021-10-13 00:16:05,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-10-13 00:16:05,922 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 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 43 [2021-10-13 00:16:05,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:16:05,923 INFO L225 Difference]: With dead ends: 49 [2021-10-13 00:16:05,923 INFO L226 Difference]: Without dead ends: 45 [2021-10-13 00:16:05,924 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 486.6ms TimeCoverageRelationStatistics Valid=741, Invalid=741, Unknown=0, NotChecked=0, Total=1482 [2021-10-13 00:16:05,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-10-13 00:16:05,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-10-13 00:16:05,926 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) [2021-10-13 00:16:05,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 45 transitions. [2021-10-13 00:16:05,927 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 45 transitions. Word has length 43 [2021-10-13 00:16:05,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:16:05,927 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 45 transitions. [2021-10-13 00:16:05,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 1.1025641025641026) internal successors, (43), 39 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) [2021-10-13 00:16:05,928 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 45 transitions. [2021-10-13 00:16:05,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-10-13 00:16:05,928 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:16:05,928 INFO L512 BasicCegarLoop]: trace histogram [37, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:16:05,971 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-10-13 00:16:06,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-10-13 00:16:06,144 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:16:06,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:16:06,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1090841837, now seen corresponding path program 37 times [2021-10-13 00:16:06,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:16:06,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845763278] [2021-10-13 00:16:06,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:16:06,144 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:16:06,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:16:06,742 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:06,742 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:16:06,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845763278] [2021-10-13 00:16:06,743 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845763278] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:16:06,743 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348227808] [2021-10-13 00:16:06,743 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 00:16:06,743 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:16:06,743 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:16:06,744 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:16:06,744 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-10-13 00:16:07,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:16:07,071 INFO L263 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 39 conjunts are in the unsatisfiable core [2021-10-13 00:16:07,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:16:07,227 INFO L134 CoverageAnalysis]: Checked inductivity of 703 backedges. 0 proven. 703 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:07,227 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348227808] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:16:07,227 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:16:07,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40] total 40 [2021-10-13 00:16:07,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840401850] [2021-10-13 00:16:07,228 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2021-10-13 00:16:07,228 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:16:07,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2021-10-13 00:16:07,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-10-13 00:16:07,230 INFO L87 Difference]: Start difference. First operand 45 states and 45 transitions. Second operand has 40 states, 40 states have (on average 1.1) internal successors, (44), 40 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:16:07,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:16:07,272 INFO L93 Difference]: Finished difference Result 50 states and 50 transitions. [2021-10-13 00:16:07,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-10-13 00:16:07,273 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 1.1) internal successors, (44), 40 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-10-13 00:16:07,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:16:07,277 INFO L225 Difference]: With dead ends: 50 [2021-10-13 00:16:07,277 INFO L226 Difference]: Without dead ends: 46 [2021-10-13 00:16:07,278 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 46 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 514.8ms TimeCoverageRelationStatistics Valid=780, Invalid=780, Unknown=0, NotChecked=0, Total=1560 [2021-10-13 00:16:07,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2021-10-13 00:16:07,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2021-10-13 00:16:07,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.0222222222222221) internal successors, (46), 45 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:16:07,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 46 transitions. [2021-10-13 00:16:07,282 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 46 transitions. Word has length 44 [2021-10-13 00:16:07,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:16:07,282 INFO L470 AbstractCegarLoop]: Abstraction has 46 states and 46 transitions. [2021-10-13 00:16:07,282 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 1.1) internal successors, (44), 40 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:16:07,283 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 46 transitions. [2021-10-13 00:16:07,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-10-13 00:16:07,283 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:16:07,283 INFO L512 BasicCegarLoop]: trace histogram [38, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:16:07,323 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-10-13 00:16:07,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-10-13 00:16:07,512 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:16:07,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:16:07,512 INFO L82 PathProgramCache]: Analyzing trace with hash 545306827, now seen corresponding path program 38 times [2021-10-13 00:16:07,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:16:07,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891130110] [2021-10-13 00:16:07,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:16:07,512 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:16:07,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:16:08,138 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:08,139 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:16:08,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891130110] [2021-10-13 00:16:08,139 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891130110] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:16:08,139 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223214579] [2021-10-13 00:16:08,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:16:08,139 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:16:08,140 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:16:08,143 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:16:08,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-10-13 00:16:08,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:16:08,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:16:08,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-13 00:16:08,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:16:08,642 INFO L134 CoverageAnalysis]: Checked inductivity of 741 backedges. 0 proven. 741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:08,642 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223214579] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:16:08,643 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:16:08,643 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41] total 41 [2021-10-13 00:16:08,643 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133275351] [2021-10-13 00:16:08,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-10-13 00:16:08,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:16:08,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-10-13 00:16:08,646 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-10-13 00:16:08,647 INFO L87 Difference]: Start difference. First operand 46 states and 46 transitions. Second operand has 41 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 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) [2021-10-13 00:16:08,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:16:08,686 INFO L93 Difference]: Finished difference Result 51 states and 51 transitions. [2021-10-13 00:16:08,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-10-13 00:16:08,686 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 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 45 [2021-10-13 00:16:08,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:16:08,687 INFO L225 Difference]: With dead ends: 51 [2021-10-13 00:16:08,687 INFO L226 Difference]: Without dead ends: 47 [2021-10-13 00:16:08,688 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 536.7ms TimeCoverageRelationStatistics Valid=820, Invalid=820, Unknown=0, NotChecked=0, Total=1640 [2021-10-13 00:16:08,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2021-10-13 00:16:08,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 47. [2021-10-13 00:16:08,691 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) [2021-10-13 00:16:08,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 47 transitions. [2021-10-13 00:16:08,691 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 47 transitions. Word has length 45 [2021-10-13 00:16:08,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:16:08,692 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 47 transitions. [2021-10-13 00:16:08,692 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.0975609756097562) internal successors, (45), 41 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) [2021-10-13 00:16:08,692 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 47 transitions. [2021-10-13 00:16:08,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-13 00:16:08,693 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:16:08,693 INFO L512 BasicCegarLoop]: trace histogram [39, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:16:08,735 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-10-13 00:16:08,907 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-10-13 00:16:08,908 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:16:08,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:16:08,908 INFO L82 PathProgramCache]: Analyzing trace with hash -273692141, now seen corresponding path program 39 times [2021-10-13 00:16:08,908 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:16:08,908 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596201780] [2021-10-13 00:16:08,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:16:08,908 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:16:08,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:16:09,530 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:09,531 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:16:09,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596201780] [2021-10-13 00:16:09,531 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596201780] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:16:09,531 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1627598916] [2021-10-13 00:16:09,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 00:16:09,531 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:16:09,531 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:16:09,532 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:16:09,534 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-10-13 00:16:09,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2021-10-13 00:16:09,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:16:09,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 41 conjunts are in the unsatisfiable core [2021-10-13 00:16:09,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:16:10,044 INFO L134 CoverageAnalysis]: Checked inductivity of 780 backedges. 0 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:10,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1627598916] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:16:10,044 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:16:10,044 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42] total 42 [2021-10-13 00:16:10,044 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176842382] [2021-10-13 00:16:10,045 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2021-10-13 00:16:10,045 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:16:10,045 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2021-10-13 00:16:10,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-10-13 00:16:10,046 INFO L87 Difference]: Start difference. First operand 47 states and 47 transitions. Second operand has 42 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:16:10,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:16:10,096 INFO L93 Difference]: Finished difference Result 52 states and 52 transitions. [2021-10-13 00:16:10,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-10-13 00:16:10,096 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-10-13 00:16:10,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:16:10,097 INFO L225 Difference]: With dead ends: 52 [2021-10-13 00:16:10,097 INFO L226 Difference]: Without dead ends: 48 [2021-10-13 00:16:10,098 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 531.6ms TimeCoverageRelationStatistics Valid=861, Invalid=861, Unknown=0, NotChecked=0, Total=1722 [2021-10-13 00:16:10,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-10-13 00:16:10,100 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-10-13 00:16:10,100 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0212765957446808) internal successors, (48), 47 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:16:10,100 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 48 transitions. [2021-10-13 00:16:10,100 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 48 transitions. Word has length 46 [2021-10-13 00:16:10,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:16:10,101 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 48 transitions. [2021-10-13 00:16:10,101 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 1.0952380952380953) internal successors, (46), 42 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:16:10,101 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 48 transitions. [2021-10-13 00:16:10,101 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-10-13 00:16:10,102 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:16:10,102 INFO L512 BasicCegarLoop]: trace histogram [40, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:16:10,129 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-10-13 00:16:10,315 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:16:10,316 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:16:10,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:16:10,316 INFO L82 PathProgramCache]: Analyzing trace with hash 107143627, now seen corresponding path program 40 times [2021-10-13 00:16:10,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:16:10,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412591903] [2021-10-13 00:16:10,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:16:10,317 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:16:10,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:16:11,077 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:11,077 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:16:11,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412591903] [2021-10-13 00:16:11,077 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [412591903] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:16:11,077 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060805988] [2021-10-13 00:16:11,077 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 00:16:11,078 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:16:11,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:16:11,080 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:16:11,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-10-13 00:16:11,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 00:16:11,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:16:11,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 42 conjunts are in the unsatisfiable core [2021-10-13 00:16:11,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:16:11,643 INFO L134 CoverageAnalysis]: Checked inductivity of 820 backedges. 0 proven. 820 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:11,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060805988] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:16:11,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:16:11,644 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43] total 43 [2021-10-13 00:16:11,644 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999407515] [2021-10-13 00:16:11,644 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-10-13 00:16:11,644 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:16:11,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-10-13 00:16:11,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-10-13 00:16:11,645 INFO L87 Difference]: Start difference. First operand 48 states and 48 transitions. Second operand has 43 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 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) [2021-10-13 00:16:11,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:16:11,678 INFO L93 Difference]: Finished difference Result 53 states and 53 transitions. [2021-10-13 00:16:11,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-10-13 00:16:11,679 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 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 47 [2021-10-13 00:16:11,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:16:11,679 INFO L225 Difference]: With dead ends: 53 [2021-10-13 00:16:11,679 INFO L226 Difference]: Without dead ends: 49 [2021-10-13 00:16:11,680 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 667.5ms TimeCoverageRelationStatistics Valid=903, Invalid=903, Unknown=0, NotChecked=0, Total=1806 [2021-10-13 00:16:11,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2021-10-13 00:16:11,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2021-10-13 00:16:11,682 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) [2021-10-13 00:16:11,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 49 transitions. [2021-10-13 00:16:11,682 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 49 transitions. Word has length 47 [2021-10-13 00:16:11,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:16:11,682 INFO L470 AbstractCegarLoop]: Abstraction has 49 states and 49 transitions. [2021-10-13 00:16:11,682 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 1.0930232558139534) internal successors, (47), 43 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) [2021-10-13 00:16:11,682 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 49 transitions. [2021-10-13 00:16:11,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-10-13 00:16:11,683 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:16:11,683 INFO L512 BasicCegarLoop]: trace histogram [41, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:16:11,715 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-10-13 00:16:11,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:16:11,896 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:16:11,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:16:11,896 INFO L82 PathProgramCache]: Analyzing trace with hash -971849453, now seen corresponding path program 41 times [2021-10-13 00:16:11,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:16:11,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1036924933] [2021-10-13 00:16:11,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:16:11,896 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:16:11,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:16:12,736 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:12,736 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:16:12,736 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1036924933] [2021-10-13 00:16:12,736 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1036924933] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:16:12,737 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024959532] [2021-10-13 00:16:12,737 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 00:16:12,737 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:16:12,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:16:12,738 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:16:12,754 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-10-13 00:16:13,247 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2021-10-13 00:16:13,247 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:16:13,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 43 conjunts are in the unsatisfiable core [2021-10-13 00:16:13,250 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:16:13,403 INFO L134 CoverageAnalysis]: Checked inductivity of 861 backedges. 0 proven. 861 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:13,403 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024959532] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:16:13,403 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:16:13,404 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44] total 44 [2021-10-13 00:16:13,404 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856739443] [2021-10-13 00:16:13,404 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-10-13 00:16:13,404 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:16:13,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-10-13 00:16:13,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-10-13 00:16:13,406 INFO L87 Difference]: Start difference. First operand 49 states and 49 transitions. Second operand has 44 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 44 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:16:13,445 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:16:13,446 INFO L93 Difference]: Finished difference Result 54 states and 54 transitions. [2021-10-13 00:16:13,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-10-13 00:16:13,446 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 44 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-10-13 00:16:13,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:16:13,447 INFO L225 Difference]: With dead ends: 54 [2021-10-13 00:16:13,447 INFO L226 Difference]: Without dead ends: 50 [2021-10-13 00:16:13,449 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 50 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 740.1ms TimeCoverageRelationStatistics Valid=946, Invalid=946, Unknown=0, NotChecked=0, Total=1892 [2021-10-13 00:16:13,449 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2021-10-13 00:16:13,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 50. [2021-10-13 00:16:13,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 1.0204081632653061) internal successors, (50), 49 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:16:13,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 50 transitions. [2021-10-13 00:16:13,452 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 50 transitions. Word has length 48 [2021-10-13 00:16:13,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:16:13,454 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 50 transitions. [2021-10-13 00:16:13,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.0909090909090908) internal successors, (48), 44 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:16:13,455 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 50 transitions. [2021-10-13 00:16:13,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-10-13 00:16:13,455 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:16:13,456 INFO L512 BasicCegarLoop]: trace histogram [42, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:16:13,490 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-10-13 00:16:13,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-10-13 00:16:13,670 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:16:13,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:16:13,670 INFO L82 PathProgramCache]: Analyzing trace with hash -60896565, now seen corresponding path program 42 times [2021-10-13 00:16:13,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:16:13,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731866048] [2021-10-13 00:16:13,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:16:13,670 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:16:13,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:16:14,513 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:14,513 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:16:14,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731866048] [2021-10-13 00:16:14,513 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731866048] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:16:14,513 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854031603] [2021-10-13 00:16:14,513 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 00:16:14,513 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:16:14,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:16:14,514 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:16:14,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-10-13 00:16:14,922 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 22 check-sat command(s) [2021-10-13 00:16:14,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:16:14,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 44 conjunts are in the unsatisfiable core [2021-10-13 00:16:14,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:16:15,065 INFO L134 CoverageAnalysis]: Checked inductivity of 903 backedges. 0 proven. 903 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:15,066 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854031603] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:16:15,066 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:16:15,066 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45] total 45 [2021-10-13 00:16:15,066 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837472420] [2021-10-13 00:16:15,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-10-13 00:16:15,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:16:15,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-10-13 00:16:15,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-10-13 00:16:15,068 INFO L87 Difference]: Start difference. First operand 50 states and 50 transitions. Second operand has 45 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 45 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) [2021-10-13 00:16:15,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:16:15,120 INFO L93 Difference]: Finished difference Result 55 states and 55 transitions. [2021-10-13 00:16:15,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-10-13 00:16:15,120 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 45 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 49 [2021-10-13 00:16:15,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:16:15,121 INFO L225 Difference]: With dead ends: 55 [2021-10-13 00:16:15,121 INFO L226 Difference]: Without dead ends: 51 [2021-10-13 00:16:15,121 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 51 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 729.7ms TimeCoverageRelationStatistics Valid=990, Invalid=990, Unknown=0, NotChecked=0, Total=1980 [2021-10-13 00:16:15,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2021-10-13 00:16:15,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 51. [2021-10-13 00:16:15,123 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) [2021-10-13 00:16:15,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 51 transitions. [2021-10-13 00:16:15,123 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 51 transitions. Word has length 49 [2021-10-13 00:16:15,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:16:15,124 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 51 transitions. [2021-10-13 00:16:15,124 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 1.0888888888888888) internal successors, (49), 45 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) [2021-10-13 00:16:15,124 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 51 transitions. [2021-10-13 00:16:15,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-10-13 00:16:15,124 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:16:15,124 INFO L512 BasicCegarLoop]: trace histogram [43, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:16:15,146 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-10-13 00:16:15,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:16:15,325 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:16:15,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:16:15,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1886128109, now seen corresponding path program 43 times [2021-10-13 00:16:15,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:16:15,325 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740748075] [2021-10-13 00:16:15,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:16:15,326 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:16:15,345 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:16:16,113 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:16,113 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:16:16,113 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740748075] [2021-10-13 00:16:16,114 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740748075] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:16:16,114 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806027947] [2021-10-13 00:16:16,114 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 00:16:16,114 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:16:16,114 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:16:16,115 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:16:16,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-10-13 00:16:16,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:16:16,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 260 conjuncts, 45 conjunts are in the unsatisfiable core [2021-10-13 00:16:16,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:16:16,704 INFO L134 CoverageAnalysis]: Checked inductivity of 946 backedges. 0 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:16,705 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1806027947] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:16:16,705 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:16:16,705 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 46] total 46 [2021-10-13 00:16:16,705 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519238734] [2021-10-13 00:16:16,706 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2021-10-13 00:16:16,706 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:16:16,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2021-10-13 00:16:16,707 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-10-13 00:16:16,707 INFO L87 Difference]: Start difference. First operand 51 states and 51 transitions. Second operand has 46 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:16:16,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:16:16,752 INFO L93 Difference]: Finished difference Result 56 states and 56 transitions. [2021-10-13 00:16:16,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-10-13 00:16:16,752 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-10-13 00:16:16,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:16:16,753 INFO L225 Difference]: With dead ends: 56 [2021-10-13 00:16:16,753 INFO L226 Difference]: Without dead ends: 52 [2021-10-13 00:16:16,753 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 690.7ms TimeCoverageRelationStatistics Valid=1035, Invalid=1035, Unknown=0, NotChecked=0, Total=2070 [2021-10-13 00:16:16,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2021-10-13 00:16:16,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2021-10-13 00:16:16,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 1.0196078431372548) internal successors, (52), 51 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:16:16,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 52 transitions. [2021-10-13 00:16:16,755 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 52 transitions. Word has length 50 [2021-10-13 00:16:16,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:16:16,755 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 52 transitions. [2021-10-13 00:16:16,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 1.0869565217391304) internal successors, (50), 46 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:16:16,755 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 52 transitions. [2021-10-13 00:16:16,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-10-13 00:16:16,755 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:16:16,756 INFO L512 BasicCegarLoop]: trace histogram [44, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:16:16,796 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-10-13 00:16:16,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:16:16,956 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:16:16,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:16:16,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1661236171, now seen corresponding path program 44 times [2021-10-13 00:16:16,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:16:16,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183622138] [2021-10-13 00:16:16,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:16:16,957 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:16:16,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:16:17,763 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:17,763 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:16:17,763 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183622138] [2021-10-13 00:16:17,764 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183622138] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:16:17,764 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1555407196] [2021-10-13 00:16:17,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:16:17,764 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:16:17,764 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:16:17,765 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:16:17,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-10-13 00:16:18,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:16:18,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:16:18,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 46 conjunts are in the unsatisfiable core [2021-10-13 00:16:18,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:16:18,361 INFO L134 CoverageAnalysis]: Checked inductivity of 990 backedges. 0 proven. 990 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:18,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1555407196] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:16:18,362 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:16:18,362 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47] total 47 [2021-10-13 00:16:18,362 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995602766] [2021-10-13 00:16:18,362 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2021-10-13 00:16:18,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:16:18,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2021-10-13 00:16:18,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-10-13 00:16:18,364 INFO L87 Difference]: Start difference. First operand 52 states and 52 transitions. Second operand has 47 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 47 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) [2021-10-13 00:16:18,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:16:18,413 INFO L93 Difference]: Finished difference Result 57 states and 57 transitions. [2021-10-13 00:16:18,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-10-13 00:16:18,413 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 47 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 51 [2021-10-13 00:16:18,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:16:18,415 INFO L225 Difference]: With dead ends: 57 [2021-10-13 00:16:18,415 INFO L226 Difference]: Without dead ends: 53 [2021-10-13 00:16:18,416 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 53 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 708.8ms TimeCoverageRelationStatistics Valid=1081, Invalid=1081, Unknown=0, NotChecked=0, Total=2162 [2021-10-13 00:16:18,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2021-10-13 00:16:18,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 53. [2021-10-13 00:16:18,418 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) [2021-10-13 00:16:18,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 53 transitions. [2021-10-13 00:16:18,419 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 53 transitions. Word has length 51 [2021-10-13 00:16:18,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:16:18,419 INFO L470 AbstractCegarLoop]: Abstraction has 53 states and 53 transitions. [2021-10-13 00:16:18,420 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 1.0851063829787233) internal successors, (51), 47 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) [2021-10-13 00:16:18,420 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 53 transitions. [2021-10-13 00:16:18,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-10-13 00:16:18,420 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:16:18,420 INFO L512 BasicCegarLoop]: trace histogram [45, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:16:18,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-10-13 00:16:18,635 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2021-10-13 00:16:18,636 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:16:18,636 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:16:18,636 INFO L82 PathProgramCache]: Analyzing trace with hash -39620845, now seen corresponding path program 45 times [2021-10-13 00:16:18,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:16:18,636 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720559816] [2021-10-13 00:16:18,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:16:18,636 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:16:18,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:16:19,488 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:19,489 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:16:19,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720559816] [2021-10-13 00:16:19,489 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720559816] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:16:19,489 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777494478] [2021-10-13 00:16:19,489 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 00:16:19,489 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:16:19,489 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:16:19,490 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:16:19,491 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-10-13 00:16:19,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2021-10-13 00:16:19,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:16:19,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 47 conjunts are in the unsatisfiable core [2021-10-13 00:16:19,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:16:20,099 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 0 proven. 1035 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:20,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777494478] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:16:20,100 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:16:20,100 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48] total 48 [2021-10-13 00:16:20,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612298938] [2021-10-13 00:16:20,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-10-13 00:16:20,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:16:20,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-10-13 00:16:20,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-10-13 00:16:20,101 INFO L87 Difference]: Start difference. First operand 53 states and 53 transitions. Second operand has 48 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 48 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:16:20,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:16:20,167 INFO L93 Difference]: Finished difference Result 58 states and 58 transitions. [2021-10-13 00:16:20,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-10-13 00:16:20,168 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 48 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-10-13 00:16:20,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:16:20,169 INFO L225 Difference]: With dead ends: 58 [2021-10-13 00:16:20,169 INFO L226 Difference]: Without dead ends: 54 [2021-10-13 00:16:20,169 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 54 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 730.7ms TimeCoverageRelationStatistics Valid=1128, Invalid=1128, Unknown=0, NotChecked=0, Total=2256 [2021-10-13 00:16:20,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-10-13 00:16:20,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-10-13 00:16:20,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0188679245283019) internal successors, (54), 53 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:16:20,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 54 transitions. [2021-10-13 00:16:20,173 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 54 transitions. Word has length 52 [2021-10-13 00:16:20,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:16:20,173 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 54 transitions. [2021-10-13 00:16:20,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 1.0833333333333333) internal successors, (52), 48 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:16:20,173 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 54 transitions. [2021-10-13 00:16:20,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-10-13 00:16:20,174 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:16:20,174 INFO L512 BasicCegarLoop]: trace histogram [46, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:16:20,210 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-10-13 00:16:20,387 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-10-13 00:16:20,388 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:16:20,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:16:20,388 INFO L82 PathProgramCache]: Analyzing trace with hash -1226580789, now seen corresponding path program 46 times [2021-10-13 00:16:20,388 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:16:20,388 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870527079] [2021-10-13 00:16:20,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:16:20,388 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:16:20,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:16:21,398 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:21,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:16:21,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870527079] [2021-10-13 00:16:21,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870527079] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:16:21,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838327288] [2021-10-13 00:16:21,399 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 00:16:21,399 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:16:21,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:16:21,400 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:16:21,401 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-10-13 00:16:21,870 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 00:16:21,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:16:21,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 48 conjunts are in the unsatisfiable core [2021-10-13 00:16:21,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:16:22,028 INFO L134 CoverageAnalysis]: Checked inductivity of 1081 backedges. 0 proven. 1081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:22,028 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838327288] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:16:22,028 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:16:22,028 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49] total 49 [2021-10-13 00:16:22,029 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118655646] [2021-10-13 00:16:22,029 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 49 states [2021-10-13 00:16:22,029 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:16:22,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 49 interpolants. [2021-10-13 00:16:22,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-10-13 00:16:22,030 INFO L87 Difference]: Start difference. First operand 54 states and 54 transitions. Second operand has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 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) [2021-10-13 00:16:22,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:16:22,095 INFO L93 Difference]: Finished difference Result 59 states and 59 transitions. [2021-10-13 00:16:22,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-10-13 00:16:22,096 INFO L78 Accepts]: Start accepts. Automaton has has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 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 53 [2021-10-13 00:16:22,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:16:22,096 INFO L225 Difference]: With dead ends: 59 [2021-10-13 00:16:22,096 INFO L226 Difference]: Without dead ends: 55 [2021-10-13 00:16:22,098 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 867.4ms TimeCoverageRelationStatistics Valid=1176, Invalid=1176, Unknown=0, NotChecked=0, Total=2352 [2021-10-13 00:16:22,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2021-10-13 00:16:22,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 55. [2021-10-13 00:16:22,101 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) [2021-10-13 00:16:22,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 55 transitions. [2021-10-13 00:16:22,102 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 55 transitions. Word has length 53 [2021-10-13 00:16:22,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:16:22,102 INFO L470 AbstractCegarLoop]: Abstraction has 55 states and 55 transitions. [2021-10-13 00:16:22,103 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 49 states, 49 states have (on average 1.0816326530612246) internal successors, (53), 49 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) [2021-10-13 00:16:22,103 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 55 transitions. [2021-10-13 00:16:22,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-10-13 00:16:22,103 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:16:22,103 INFO L512 BasicCegarLoop]: trace histogram [47, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:16:22,142 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-10-13 00:16:22,342 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-10-13 00:16:22,342 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:16:22,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:16:22,342 INFO L82 PathProgramCache]: Analyzing trace with hash 632366611, now seen corresponding path program 47 times [2021-10-13 00:16:22,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:16:22,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184396029] [2021-10-13 00:16:22,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:16:22,343 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:16:22,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:16:23,358 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:23,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:16:23,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184396029] [2021-10-13 00:16:23,359 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184396029] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:16:23,359 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365926791] [2021-10-13 00:16:23,359 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 00:16:23,359 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:16:23,359 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:16:23,360 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:16:23,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-10-13 00:16:23,867 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 25 check-sat command(s) [2021-10-13 00:16:23,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:16:23,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 280 conjuncts, 49 conjunts are in the unsatisfiable core [2021-10-13 00:16:23,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:16:24,016 INFO L134 CoverageAnalysis]: Checked inductivity of 1128 backedges. 0 proven. 1128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:24,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365926791] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:16:24,017 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:16:24,017 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50] total 50 [2021-10-13 00:16:24,017 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460396882] [2021-10-13 00:16:24,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-10-13 00:16:24,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:16:24,019 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-10-13 00:16:24,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2021-10-13 00:16:24,020 INFO L87 Difference]: Start difference. First operand 55 states and 55 transitions. Second operand has 50 states, 50 states have (on average 1.08) internal successors, (54), 50 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:16:24,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:16:24,072 INFO L93 Difference]: Finished difference Result 60 states and 60 transitions. [2021-10-13 00:16:24,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-10-13 00:16:24,072 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.08) internal successors, (54), 50 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-10-13 00:16:24,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:16:24,073 INFO L225 Difference]: With dead ends: 60 [2021-10-13 00:16:24,073 INFO L226 Difference]: Without dead ends: 56 [2021-10-13 00:16:24,073 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 903.6ms TimeCoverageRelationStatistics Valid=1225, Invalid=1225, Unknown=0, NotChecked=0, Total=2450 [2021-10-13 00:16:24,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2021-10-13 00:16:24,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2021-10-13 00:16:24,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.018181818181818) internal successors, (56), 55 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:16:24,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 56 transitions. [2021-10-13 00:16:24,075 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 56 transitions. Word has length 54 [2021-10-13 00:16:24,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:16:24,075 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 56 transitions. [2021-10-13 00:16:24,075 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.08) internal successors, (54), 50 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:16:24,075 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 56 transitions. [2021-10-13 00:16:24,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-10-13 00:16:24,076 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:16:24,076 INFO L512 BasicCegarLoop]: trace histogram [48, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:16:24,101 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-10-13 00:16:24,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-10-13 00:16:24,276 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:16:24,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:16:24,277 INFO L82 PathProgramCache]: Analyzing trace with hash -1869806133, now seen corresponding path program 48 times [2021-10-13 00:16:24,277 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:16:24,277 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453831392] [2021-10-13 00:16:24,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:16:24,277 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:16:24,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:16:25,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:25,198 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:16:25,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453831392] [2021-10-13 00:16:25,198 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453831392] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:16:25,198 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511707126] [2021-10-13 00:16:25,198 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 00:16:25,199 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:16:25,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:16:25,202 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:16:25,203 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-10-13 00:16:25,726 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2021-10-13 00:16:25,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:16:25,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 285 conjuncts, 50 conjunts are in the unsatisfiable core [2021-10-13 00:16:25,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:16:25,874 INFO L134 CoverageAnalysis]: Checked inductivity of 1176 backedges. 0 proven. 1176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:25,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511707126] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:16:25,874 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:16:25,875 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51] total 51 [2021-10-13 00:16:25,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043550751] [2021-10-13 00:16:25,875 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-10-13 00:16:25,875 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:16:25,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-10-13 00:16:25,876 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-10-13 00:16:25,876 INFO L87 Difference]: Start difference. First operand 56 states and 56 transitions. Second operand has 51 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 51 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) [2021-10-13 00:16:25,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:16:25,913 INFO L93 Difference]: Finished difference Result 61 states and 61 transitions. [2021-10-13 00:16:25,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-10-13 00:16:25,914 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 51 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-10-13 00:16:25,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:16:25,922 INFO L225 Difference]: With dead ends: 61 [2021-10-13 00:16:25,922 INFO L226 Difference]: Without dead ends: 57 [2021-10-13 00:16:25,923 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 816.6ms TimeCoverageRelationStatistics Valid=1275, Invalid=1275, Unknown=0, NotChecked=0, Total=2550 [2021-10-13 00:16:25,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2021-10-13 00:16:25,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 57. [2021-10-13 00:16:25,925 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) [2021-10-13 00:16:25,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 57 transitions. [2021-10-13 00:16:25,926 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 57 transitions. Word has length 55 [2021-10-13 00:16:25,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:16:25,926 INFO L470 AbstractCegarLoop]: Abstraction has 57 states and 57 transitions. [2021-10-13 00:16:25,926 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 1.0784313725490196) internal successors, (55), 51 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) [2021-10-13 00:16:25,927 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 57 transitions. [2021-10-13 00:16:25,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-10-13 00:16:25,927 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:16:25,927 INFO L512 BasicCegarLoop]: trace histogram [49, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:16:25,955 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-10-13 00:16:26,138 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-10-13 00:16:26,139 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:16:26,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:16:26,139 INFO L82 PathProgramCache]: Analyzing trace with hash -2127749869, now seen corresponding path program 49 times [2021-10-13 00:16:26,139 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:16:26,139 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218187390] [2021-10-13 00:16:26,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:16:26,139 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:16:26,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:16:27,187 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:27,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:16:27,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218187390] [2021-10-13 00:16:27,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218187390] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:16:27,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740069828] [2021-10-13 00:16:27,187 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 00:16:27,187 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:16:27,187 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:16:27,188 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:16:27,189 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-10-13 00:16:27,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:16:27,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 51 conjunts are in the unsatisfiable core [2021-10-13 00:16:27,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:16:27,878 INFO L134 CoverageAnalysis]: Checked inductivity of 1225 backedges. 0 proven. 1225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:27,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1740069828] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:16:27,878 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:16:27,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52] total 52 [2021-10-13 00:16:27,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705028622] [2021-10-13 00:16:27,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2021-10-13 00:16:27,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:16:27,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2021-10-13 00:16:27,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-10-13 00:16:27,881 INFO L87 Difference]: Start difference. First operand 57 states and 57 transitions. Second operand has 52 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 52 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:16:27,932 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:16:27,932 INFO L93 Difference]: Finished difference Result 62 states and 62 transitions. [2021-10-13 00:16:27,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2021-10-13 00:16:27,932 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 52 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2021-10-13 00:16:27,933 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:16:27,933 INFO L225 Difference]: With dead ends: 62 [2021-10-13 00:16:27,933 INFO L226 Difference]: Without dead ends: 58 [2021-10-13 00:16:27,934 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 924.8ms TimeCoverageRelationStatistics Valid=1326, Invalid=1326, Unknown=0, NotChecked=0, Total=2652 [2021-10-13 00:16:27,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-10-13 00:16:27,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 58. [2021-10-13 00:16:27,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0175438596491229) internal successors, (58), 57 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:16:27,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 58 transitions. [2021-10-13 00:16:27,937 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 58 transitions. Word has length 56 [2021-10-13 00:16:27,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:16:27,937 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 58 transitions. [2021-10-13 00:16:27,938 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 1.0769230769230769) internal successors, (56), 52 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:16:27,938 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 58 transitions. [2021-10-13 00:16:27,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2021-10-13 00:16:27,938 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:16:27,939 INFO L512 BasicCegarLoop]: trace histogram [50, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:16:27,962 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-10-13 00:16:28,143 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:16:28,144 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:16:28,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:16:28,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1534071093, now seen corresponding path program 50 times [2021-10-13 00:16:28,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:16:28,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715865628] [2021-10-13 00:16:28,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:16:28,145 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:16:28,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:16:29,209 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:29,209 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:16:29,209 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715865628] [2021-10-13 00:16:29,210 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715865628] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:16:29,210 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1614706566] [2021-10-13 00:16:29,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:16:29,210 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:16:29,210 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:16:29,212 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:16:29,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-10-13 00:16:29,749 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:16:29,749 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:16:29,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 52 conjunts are in the unsatisfiable core [2021-10-13 00:16:29,752 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:16:29,906 INFO L134 CoverageAnalysis]: Checked inductivity of 1275 backedges. 0 proven. 1275 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:29,906 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1614706566] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:16:29,906 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:16:29,906 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53] total 53 [2021-10-13 00:16:29,907 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835419440] [2021-10-13 00:16:29,907 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2021-10-13 00:16:29,907 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:16:29,908 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2021-10-13 00:16:29,908 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-10-13 00:16:29,908 INFO L87 Difference]: Start difference. First operand 58 states and 58 transitions. Second operand has 53 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 53 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) [2021-10-13 00:16:29,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:16:29,950 INFO L93 Difference]: Finished difference Result 63 states and 63 transitions. [2021-10-13 00:16:29,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-10-13 00:16:29,950 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 53 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 57 [2021-10-13 00:16:29,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:16:29,950 INFO L225 Difference]: With dead ends: 63 [2021-10-13 00:16:29,951 INFO L226 Difference]: Without dead ends: 59 [2021-10-13 00:16:29,951 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 922.3ms TimeCoverageRelationStatistics Valid=1378, Invalid=1378, Unknown=0, NotChecked=0, Total=2756 [2021-10-13 00:16:29,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2021-10-13 00:16:29,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 59. [2021-10-13 00:16:29,953 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) [2021-10-13 00:16:29,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 59 transitions. [2021-10-13 00:16:29,953 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 59 transitions. Word has length 57 [2021-10-13 00:16:29,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:16:29,954 INFO L470 AbstractCegarLoop]: Abstraction has 59 states and 59 transitions. [2021-10-13 00:16:29,954 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 1.0754716981132075) internal successors, (57), 53 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) [2021-10-13 00:16:29,954 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 59 transitions. [2021-10-13 00:16:29,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2021-10-13 00:16:29,954 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:16:29,954 INFO L512 BasicCegarLoop]: trace histogram [51, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:16:29,977 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-10-13 00:16:30,155 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2021-10-13 00:16:30,155 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:16:30,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:16:30,155 INFO L82 PathProgramCache]: Analyzing trace with hash -309898221, now seen corresponding path program 51 times [2021-10-13 00:16:30,155 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:16:30,155 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77635023] [2021-10-13 00:16:30,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:16:30,156 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:16:30,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:16:31,192 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:31,192 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:16:31,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77635023] [2021-10-13 00:16:31,192 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77635023] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:16:31,192 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128202057] [2021-10-13 00:16:31,192 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 00:16:31,192 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:16:31,193 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:16:31,193 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:16:31,194 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-10-13 00:16:31,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2021-10-13 00:16:31,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:16:31,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 300 conjuncts, 53 conjunts are in the unsatisfiable core [2021-10-13 00:16:31,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:16:31,934 INFO L134 CoverageAnalysis]: Checked inductivity of 1326 backedges. 0 proven. 1326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:31,934 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128202057] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:16:31,935 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:16:31,935 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [54, 54] total 54 [2021-10-13 00:16:31,935 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1972906363] [2021-10-13 00:16:31,935 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2021-10-13 00:16:31,936 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:16:31,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2021-10-13 00:16:31,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-10-13 00:16:31,937 INFO L87 Difference]: Start difference. First operand 59 states and 59 transitions. Second operand has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:16:32,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:16:32,001 INFO L93 Difference]: Finished difference Result 64 states and 64 transitions. [2021-10-13 00:16:32,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2021-10-13 00:16:32,002 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2021-10-13 00:16:32,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:16:32,003 INFO L225 Difference]: With dead ends: 64 [2021-10-13 00:16:32,003 INFO L226 Difference]: Without dead ends: 60 [2021-10-13 00:16:32,003 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 112 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 930.6ms TimeCoverageRelationStatistics Valid=1431, Invalid=1431, Unknown=0, NotChecked=0, Total=2862 [2021-10-13 00:16:32,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2021-10-13 00:16:32,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 60. [2021-10-13 00:16:32,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0169491525423728) internal successors, (60), 59 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:16:32,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 60 transitions. [2021-10-13 00:16:32,005 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 60 transitions. Word has length 58 [2021-10-13 00:16:32,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:16:32,005 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 60 transitions. [2021-10-13 00:16:32,006 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 54 states have (on average 1.0740740740740742) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:16:32,006 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 60 transitions. [2021-10-13 00:16:32,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2021-10-13 00:16:32,006 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:16:32,006 INFO L512 BasicCegarLoop]: trace histogram [52, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:16:32,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-10-13 00:16:32,206 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:16:32,207 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:16:32,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:16:32,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1015244853, now seen corresponding path program 52 times [2021-10-13 00:16:32,207 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:16:32,207 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969969879] [2021-10-13 00:16:32,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:16:32,207 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:16:32,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:16:33,312 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:33,312 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:16:33,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969969879] [2021-10-13 00:16:33,312 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969969879] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:16:33,312 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181261314] [2021-10-13 00:16:33,312 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 00:16:33,312 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:16:33,312 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:16:33,313 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:16:33,314 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-10-13 00:16:33,884 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 00:16:33,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:16:33,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 305 conjuncts, 54 conjunts are in the unsatisfiable core [2021-10-13 00:16:33,887 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:16:34,097 INFO L134 CoverageAnalysis]: Checked inductivity of 1378 backedges. 0 proven. 1378 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:34,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181261314] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:16:34,097 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:16:34,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55] total 55 [2021-10-13 00:16:34,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430280071] [2021-10-13 00:16:34,098 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-10-13 00:16:34,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:16:34,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-10-13 00:16:34,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2021-10-13 00:16:34,100 INFO L87 Difference]: Start difference. First operand 60 states and 60 transitions. Second operand has 55 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 55 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) [2021-10-13 00:16:34,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:16:34,166 INFO L93 Difference]: Finished difference Result 65 states and 65 transitions. [2021-10-13 00:16:34,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-10-13 00:16:34,166 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 55 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 59 [2021-10-13 00:16:34,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:16:34,167 INFO L225 Difference]: With dead ends: 65 [2021-10-13 00:16:34,168 INFO L226 Difference]: Without dead ends: 61 [2021-10-13 00:16:34,168 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 114 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 968.9ms TimeCoverageRelationStatistics Valid=1485, Invalid=1485, Unknown=0, NotChecked=0, Total=2970 [2021-10-13 00:16:34,169 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2021-10-13 00:16:34,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 61. [2021-10-13 00:16:34,172 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) [2021-10-13 00:16:34,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 61 transitions. [2021-10-13 00:16:34,173 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 61 transitions. Word has length 59 [2021-10-13 00:16:34,173 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:16:34,173 INFO L470 AbstractCegarLoop]: Abstraction has 61 states and 61 transitions. [2021-10-13 00:16:34,173 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 1.0727272727272728) internal successors, (59), 55 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) [2021-10-13 00:16:34,173 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 61 transitions. [2021-10-13 00:16:34,174 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2021-10-13 00:16:34,174 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:16:34,174 INFO L512 BasicCegarLoop]: trace histogram [53, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:16:34,211 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-10-13 00:16:34,395 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:16:34,396 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:16:34,396 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:16:34,396 INFO L82 PathProgramCache]: Analyzing trace with hash -1406153965, now seen corresponding path program 53 times [2021-10-13 00:16:34,396 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:16:34,396 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121196930] [2021-10-13 00:16:34,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:16:34,397 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:16:34,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:16:35,586 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:35,586 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:16:35,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121196930] [2021-10-13 00:16:35,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2121196930] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:16:35,586 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268543360] [2021-10-13 00:16:35,586 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 00:16:35,586 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:16:35,586 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:16:35,588 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:16:35,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-10-13 00:16:36,191 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2021-10-13 00:16:36,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:16:36,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 310 conjuncts, 55 conjunts are in the unsatisfiable core [2021-10-13 00:16:36,198 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:16:36,362 INFO L134 CoverageAnalysis]: Checked inductivity of 1431 backedges. 0 proven. 1431 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:36,362 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268543360] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:16:36,362 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:16:36,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [56, 56] total 56 [2021-10-13 00:16:36,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419574081] [2021-10-13 00:16:36,364 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2021-10-13 00:16:36,365 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:16:36,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2021-10-13 00:16:36,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2021-10-13 00:16:36,366 INFO L87 Difference]: Start difference. First operand 61 states and 61 transitions. Second operand has 56 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 56 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:16:36,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:16:36,416 INFO L93 Difference]: Finished difference Result 66 states and 66 transitions. [2021-10-13 00:16:36,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-10-13 00:16:36,416 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 56 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 60 [2021-10-13 00:16:36,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:16:36,417 INFO L225 Difference]: With dead ends: 66 [2021-10-13 00:16:36,417 INFO L226 Difference]: Without dead ends: 62 [2021-10-13 00:16:36,417 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 62 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1056.1ms TimeCoverageRelationStatistics Valid=1540, Invalid=1540, Unknown=0, NotChecked=0, Total=3080 [2021-10-13 00:16:36,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2021-10-13 00:16:36,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 62. [2021-10-13 00:16:36,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.0163934426229508) internal successors, (62), 61 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:16:36,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 62 transitions. [2021-10-13 00:16:36,419 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 62 transitions. Word has length 60 [2021-10-13 00:16:36,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:16:36,419 INFO L470 AbstractCegarLoop]: Abstraction has 62 states and 62 transitions. [2021-10-13 00:16:36,419 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 1.0714285714285714) internal successors, (60), 56 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:16:36,420 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 62 transitions. [2021-10-13 00:16:36,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2021-10-13 00:16:36,420 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:16:36,420 INFO L512 BasicCegarLoop]: trace histogram [54, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:16:36,442 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-10-13 00:16:36,620 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-10-13 00:16:36,620 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:16:36,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:16:36,621 INFO L82 PathProgramCache]: Analyzing trace with hash -639434549, now seen corresponding path program 54 times [2021-10-13 00:16:36,621 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:16:36,621 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1890071930] [2021-10-13 00:16:36,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:16:36,621 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:16:36,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:16:37,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:37,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:16:37,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1890071930] [2021-10-13 00:16:37,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1890071930] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:16:37,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198574558] [2021-10-13 00:16:37,852 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 00:16:37,852 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:16:37,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:16:37,853 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:16:37,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-10-13 00:16:38,486 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 28 check-sat command(s) [2021-10-13 00:16:38,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:16:38,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 315 conjuncts, 56 conjunts are in the unsatisfiable core [2021-10-13 00:16:38,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:16:38,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1485 backedges. 0 proven. 1485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:38,644 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198574558] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:16:38,644 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:16:38,645 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57] total 57 [2021-10-13 00:16:38,645 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [88648323] [2021-10-13 00:16:38,645 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2021-10-13 00:16:38,645 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:16:38,646 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2021-10-13 00:16:38,647 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2021-10-13 00:16:38,647 INFO L87 Difference]: Start difference. First operand 62 states and 62 transitions. Second operand has 57 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 57 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) [2021-10-13 00:16:38,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:16:38,720 INFO L93 Difference]: Finished difference Result 67 states and 67 transitions. [2021-10-13 00:16:38,720 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2021-10-13 00:16:38,720 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 57 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 61 [2021-10-13 00:16:38,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:16:38,721 INFO L225 Difference]: With dead ends: 67 [2021-10-13 00:16:38,721 INFO L226 Difference]: Without dead ends: 63 [2021-10-13 00:16:38,721 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 118 GetRequests, 63 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1090.3ms TimeCoverageRelationStatistics Valid=1596, Invalid=1596, Unknown=0, NotChecked=0, Total=3192 [2021-10-13 00:16:38,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2021-10-13 00:16:38,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 63. [2021-10-13 00:16:38,723 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) [2021-10-13 00:16:38,723 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 63 transitions. [2021-10-13 00:16:38,723 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 63 transitions. Word has length 61 [2021-10-13 00:16:38,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:16:38,723 INFO L470 AbstractCegarLoop]: Abstraction has 63 states and 63 transitions. [2021-10-13 00:16:38,724 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 1.0701754385964912) internal successors, (61), 57 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) [2021-10-13 00:16:38,724 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 63 transitions. [2021-10-13 00:16:38,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2021-10-13 00:16:38,724 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:16:38,724 INFO L512 BasicCegarLoop]: trace histogram [55, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:16:38,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-10-13 00:16:38,925 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-10-13 00:16:38,925 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:16:38,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:16:38,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1654030867, now seen corresponding path program 55 times [2021-10-13 00:16:38,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:16:38,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987299151] [2021-10-13 00:16:38,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:16:38,926 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:16:38,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:16:40,132 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:40,132 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:16:40,132 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987299151] [2021-10-13 00:16:40,133 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [987299151] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:16:40,133 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [876106657] [2021-10-13 00:16:40,133 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 00:16:40,133 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:16:40,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:16:40,134 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:16:40,135 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-10-13 00:16:40,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:16:40,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 57 conjunts are in the unsatisfiable core [2021-10-13 00:16:40,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:16:40,940 INFO L134 CoverageAnalysis]: Checked inductivity of 1540 backedges. 0 proven. 1540 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:40,940 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [876106657] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:16:40,940 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:16:40,940 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [58, 58] total 58 [2021-10-13 00:16:40,941 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599271203] [2021-10-13 00:16:40,941 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2021-10-13 00:16:40,941 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:16:40,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2021-10-13 00:16:40,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2021-10-13 00:16:40,942 INFO L87 Difference]: Start difference. First operand 63 states and 63 transitions. Second operand has 58 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 58 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:16:40,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:16:40,988 INFO L93 Difference]: Finished difference Result 68 states and 68 transitions. [2021-10-13 00:16:40,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-10-13 00:16:40,988 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 58 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 62 [2021-10-13 00:16:40,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:16:40,989 INFO L225 Difference]: With dead ends: 68 [2021-10-13 00:16:40,989 INFO L226 Difference]: Without dead ends: 64 [2021-10-13 00:16:40,989 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 120 GetRequests, 64 SyntacticMatches, 0 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1072.2ms TimeCoverageRelationStatistics Valid=1653, Invalid=1653, Unknown=0, NotChecked=0, Total=3306 [2021-10-13 00:16:40,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-10-13 00:16:40,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 64. [2021-10-13 00:16:40,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0158730158730158) internal successors, (64), 63 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:16:40,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 64 transitions. [2021-10-13 00:16:40,991 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 64 transitions. Word has length 62 [2021-10-13 00:16:40,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:16:40,992 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 64 transitions. [2021-10-13 00:16:40,992 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 1.0689655172413792) internal successors, (62), 58 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:16:40,992 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 64 transitions. [2021-10-13 00:16:40,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2021-10-13 00:16:40,992 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:16:40,992 INFO L512 BasicCegarLoop]: trace histogram [56, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:16:41,015 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-10-13 00:16:41,192 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:16:41,193 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:16:41,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:16:41,193 INFO L82 PathProgramCache]: Analyzing trace with hash -262985269, now seen corresponding path program 56 times [2021-10-13 00:16:41,193 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:16:41,193 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124748578] [2021-10-13 00:16:41,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:16:41,193 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:16:41,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:16:42,395 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:42,396 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:16:42,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124748578] [2021-10-13 00:16:42,396 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124748578] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:16:42,396 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689227770] [2021-10-13 00:16:42,396 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:16:42,396 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:16:42,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:16:42,397 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:16:42,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-10-13 00:16:43,062 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:16:43,062 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:16:43,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 58 conjunts are in the unsatisfiable core [2021-10-13 00:16:43,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:16:43,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1596 backedges. 0 proven. 1596 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:43,251 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689227770] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:16:43,252 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:16:43,252 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59] total 59 [2021-10-13 00:16:43,252 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759548318] [2021-10-13 00:16:43,252 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 59 states [2021-10-13 00:16:43,253 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:16:43,253 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 59 interpolants. [2021-10-13 00:16:43,254 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2021-10-13 00:16:43,254 INFO L87 Difference]: Start difference. First operand 64 states and 64 transitions. Second operand has 59 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 59 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) [2021-10-13 00:16:43,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:16:43,307 INFO L93 Difference]: Finished difference Result 69 states and 69 transitions. [2021-10-13 00:16:43,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2021-10-13 00:16:43,308 INFO L78 Accepts]: Start accepts. Automaton has has 59 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 59 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 63 [2021-10-13 00:16:43,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:16:43,309 INFO L225 Difference]: With dead ends: 69 [2021-10-13 00:16:43,309 INFO L226 Difference]: Without dead ends: 65 [2021-10-13 00:16:43,309 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 122 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1069.2ms TimeCoverageRelationStatistics Valid=1711, Invalid=1711, Unknown=0, NotChecked=0, Total=3422 [2021-10-13 00:16:43,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2021-10-13 00:16:43,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 65. [2021-10-13 00:16:43,312 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) [2021-10-13 00:16:43,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 65 transitions. [2021-10-13 00:16:43,312 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 65 transitions. Word has length 63 [2021-10-13 00:16:43,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:16:43,313 INFO L470 AbstractCegarLoop]: Abstraction has 65 states and 65 transitions. [2021-10-13 00:16:43,313 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 59 states, 59 states have (on average 1.0677966101694916) internal successors, (63), 59 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) [2021-10-13 00:16:43,313 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 65 transitions. [2021-10-13 00:16:43,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 65 [2021-10-13 00:16:43,314 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:16:43,314 INFO L512 BasicCegarLoop]: trace histogram [57, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:16:43,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-10-13 00:16:43,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:16:43,539 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:16:43,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:16:43,540 INFO L82 PathProgramCache]: Analyzing trace with hash 439056659, now seen corresponding path program 57 times [2021-10-13 00:16:43,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:16:43,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31745584] [2021-10-13 00:16:43,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:16:43,540 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:16:43,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:16:45,077 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:45,078 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:16:45,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31745584] [2021-10-13 00:16:45,078 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31745584] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:16:45,078 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511388720] [2021-10-13 00:16:45,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 00:16:45,078 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:16:45,079 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:16:45,080 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:16:45,099 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-10-13 00:16:45,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 30 check-sat command(s) [2021-10-13 00:16:45,813 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:16:45,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 59 conjunts are in the unsatisfiable core [2021-10-13 00:16:45,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:16:46,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1653 backedges. 0 proven. 1653 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:46,046 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511388720] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:16:46,046 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:16:46,047 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [60, 60] total 60 [2021-10-13 00:16:46,047 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [581822707] [2021-10-13 00:16:46,047 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-10-13 00:16:46,047 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:16:46,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-10-13 00:16:46,049 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2021-10-13 00:16:46,049 INFO L87 Difference]: Start difference. First operand 65 states and 65 transitions. Second operand has 60 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 60 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:16:46,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:16:46,119 INFO L93 Difference]: Finished difference Result 70 states and 70 transitions. [2021-10-13 00:16:46,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2021-10-13 00:16:46,120 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 60 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 64 [2021-10-13 00:16:46,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:16:46,121 INFO L225 Difference]: With dead ends: 70 [2021-10-13 00:16:46,121 INFO L226 Difference]: Without dead ends: 66 [2021-10-13 00:16:46,122 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 124 GetRequests, 66 SyntacticMatches, 0 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1413.3ms TimeCoverageRelationStatistics Valid=1770, Invalid=1770, Unknown=0, NotChecked=0, Total=3540 [2021-10-13 00:16:46,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-10-13 00:16:46,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 66. [2021-10-13 00:16:46,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0153846153846153) internal successors, (66), 65 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:16:46,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 66 transitions. [2021-10-13 00:16:46,125 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 66 transitions. Word has length 64 [2021-10-13 00:16:46,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:16:46,126 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 66 transitions. [2021-10-13 00:16:46,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 1.0666666666666667) internal successors, (64), 60 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:16:46,126 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 66 transitions. [2021-10-13 00:16:46,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2021-10-13 00:16:46,127 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:16:46,127 INFO L512 BasicCegarLoop]: trace histogram [58, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:16:46,172 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-10-13 00:16:46,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:16:46,343 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:16:46,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:16:46,344 INFO L82 PathProgramCache]: Analyzing trace with hash 727519947, now seen corresponding path program 58 times [2021-10-13 00:16:46,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:16:46,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185896379] [2021-10-13 00:16:46,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:16:46,344 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:16:46,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:16:47,664 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:47,664 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:16:47,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185896379] [2021-10-13 00:16:47,664 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185896379] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:16:47,664 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387715245] [2021-10-13 00:16:47,664 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 00:16:47,664 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:16:47,664 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:16:47,665 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:16:47,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-10-13 00:16:48,355 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 00:16:48,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:16:48,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 60 conjunts are in the unsatisfiable core [2021-10-13 00:16:48,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:16:48,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1711 backedges. 0 proven. 1711 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:48,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387715245] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:16:48,569 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:16:48,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61] total 61 [2021-10-13 00:16:48,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983345553] [2021-10-13 00:16:48,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 61 states [2021-10-13 00:16:48,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:16:48,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 61 interpolants. [2021-10-13 00:16:48,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2021-10-13 00:16:48,571 INFO L87 Difference]: Start difference. First operand 66 states and 66 transitions. Second operand has 61 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 61 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) [2021-10-13 00:16:48,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:16:48,637 INFO L93 Difference]: Finished difference Result 71 states and 71 transitions. [2021-10-13 00:16:48,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-10-13 00:16:48,638 INFO L78 Accepts]: Start accepts. Automaton has has 61 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 61 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 65 [2021-10-13 00:16:48,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:16:48,638 INFO L225 Difference]: With dead ends: 71 [2021-10-13 00:16:48,639 INFO L226 Difference]: Without dead ends: 67 [2021-10-13 00:16:48,639 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 126 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1178.9ms TimeCoverageRelationStatistics Valid=1830, Invalid=1830, Unknown=0, NotChecked=0, Total=3660 [2021-10-13 00:16:48,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2021-10-13 00:16:48,641 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 67. [2021-10-13 00:16:48,642 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) [2021-10-13 00:16:48,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 67 transitions. [2021-10-13 00:16:48,643 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 67 transitions. Word has length 65 [2021-10-13 00:16:48,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:16:48,643 INFO L470 AbstractCegarLoop]: Abstraction has 67 states and 67 transitions. [2021-10-13 00:16:48,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 61 states, 61 states have (on average 1.0655737704918034) internal successors, (65), 61 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) [2021-10-13 00:16:48,644 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 67 transitions. [2021-10-13 00:16:48,644 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2021-10-13 00:16:48,644 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:16:48,644 INFO L512 BasicCegarLoop]: trace histogram [59, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:16:48,669 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-10-13 00:16:48,851 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-10-13 00:16:48,852 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:16:48,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:16:48,852 INFO L82 PathProgramCache]: Analyzing trace with hash 1079947283, now seen corresponding path program 59 times [2021-10-13 00:16:48,852 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:16:48,852 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209474437] [2021-10-13 00:16:48,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:16:48,852 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:16:48,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:16:50,347 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:50,347 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:16:50,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209474437] [2021-10-13 00:16:50,347 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209474437] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:16:50,347 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551248346] [2021-10-13 00:16:50,347 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 00:16:50,347 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:16:50,348 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:16:50,349 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:16:50,350 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-10-13 00:16:51,079 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 31 check-sat command(s) [2021-10-13 00:16:51,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:16:51,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 61 conjunts are in the unsatisfiable core [2021-10-13 00:16:51,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:16:51,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:51,250 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1551248346] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:16:51,250 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:16:51,250 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [62, 62] total 62 [2021-10-13 00:16:51,250 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757922640] [2021-10-13 00:16:51,250 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2021-10-13 00:16:51,251 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:16:51,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2021-10-13 00:16:51,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2021-10-13 00:16:51,252 INFO L87 Difference]: Start difference. First operand 67 states and 67 transitions. Second operand has 62 states, 62 states have (on average 1.064516129032258) internal successors, (66), 62 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:16:51,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:16:51,314 INFO L93 Difference]: Finished difference Result 72 states and 72 transitions. [2021-10-13 00:16:51,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-10-13 00:16:51,314 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 62 states have (on average 1.064516129032258) internal successors, (66), 62 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2021-10-13 00:16:51,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:16:51,315 INFO L225 Difference]: With dead ends: 72 [2021-10-13 00:16:51,315 INFO L226 Difference]: Without dead ends: 68 [2021-10-13 00:16:51,315 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 68 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1356.2ms TimeCoverageRelationStatistics Valid=1891, Invalid=1891, Unknown=0, NotChecked=0, Total=3782 [2021-10-13 00:16:51,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-10-13 00:16:51,317 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 68. [2021-10-13 00:16:51,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0149253731343284) internal successors, (68), 67 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:16:51,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 68 transitions. [2021-10-13 00:16:51,318 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 68 transitions. Word has length 66 [2021-10-13 00:16:51,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:16:51,319 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 68 transitions. [2021-10-13 00:16:51,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 62 states have (on average 1.064516129032258) internal successors, (66), 62 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:16:51,319 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 68 transitions. [2021-10-13 00:16:51,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2021-10-13 00:16:51,320 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:16:51,320 INFO L512 BasicCegarLoop]: trace histogram [60, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:16:51,345 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-10-13 00:16:51,539 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:16:51,540 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:16:51,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:16:51,540 INFO L82 PathProgramCache]: Analyzing trace with hash -879707189, now seen corresponding path program 60 times [2021-10-13 00:16:51,540 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:16:51,540 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672380503] [2021-10-13 00:16:51,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:16:51,540 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:16:51,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:16:52,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:52,941 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:16:52,941 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672380503] [2021-10-13 00:16:52,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672380503] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:16:52,942 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200094775] [2021-10-13 00:16:52,942 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 00:16:52,942 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:16:52,942 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:16:52,943 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:16:52,956 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-10-13 00:16:53,733 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 31 check-sat command(s) [2021-10-13 00:16:53,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:16:53,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 62 conjunts are in the unsatisfiable core [2021-10-13 00:16:53,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:16:53,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1830 backedges. 0 proven. 1830 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:53,932 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1200094775] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:16:53,932 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:16:53,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63] total 63 [2021-10-13 00:16:53,933 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812203040] [2021-10-13 00:16:53,933 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-10-13 00:16:53,933 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:16:53,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-10-13 00:16:53,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2021-10-13 00:16:53,935 INFO L87 Difference]: Start difference. First operand 68 states and 68 transitions. Second operand has 63 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 63 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) [2021-10-13 00:16:54,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:16:54,002 INFO L93 Difference]: Finished difference Result 73 states and 73 transitions. [2021-10-13 00:16:54,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2021-10-13 00:16:54,003 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 63 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 67 [2021-10-13 00:16:54,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:16:54,004 INFO L225 Difference]: With dead ends: 73 [2021-10-13 00:16:54,004 INFO L226 Difference]: Without dead ends: 69 [2021-10-13 00:16:54,005 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 130 GetRequests, 69 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1252.4ms TimeCoverageRelationStatistics Valid=1953, Invalid=1953, Unknown=0, NotChecked=0, Total=3906 [2021-10-13 00:16:54,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2021-10-13 00:16:54,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 69. [2021-10-13 00:16:54,008 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) [2021-10-13 00:16:54,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 69 transitions. [2021-10-13 00:16:54,009 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 69 transitions. Word has length 67 [2021-10-13 00:16:54,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:16:54,009 INFO L470 AbstractCegarLoop]: Abstraction has 69 states and 69 transitions. [2021-10-13 00:16:54,009 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 1.0634920634920635) internal successors, (67), 63 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) [2021-10-13 00:16:54,010 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 69 transitions. [2021-10-13 00:16:54,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2021-10-13 00:16:54,010 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:16:54,010 INFO L512 BasicCegarLoop]: trace histogram [61, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:16:54,036 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-10-13 00:16:54,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:16:54,224 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:16:54,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:16:54,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1499453677, now seen corresponding path program 61 times [2021-10-13 00:16:54,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:16:54,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059909013] [2021-10-13 00:16:54,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:16:54,225 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:16:54,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:16:55,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:55,611 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:16:55,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059909013] [2021-10-13 00:16:55,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059909013] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:16:55,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1999836792] [2021-10-13 00:16:55,611 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 00:16:55,611 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:16:55,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:16:55,612 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:16:55,612 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-10-13 00:16:56,393 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:16:56,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 63 conjunts are in the unsatisfiable core [2021-10-13 00:16:56,397 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:16:56,600 INFO L134 CoverageAnalysis]: Checked inductivity of 1891 backedges. 0 proven. 1891 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:56,600 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1999836792] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:16:56,600 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:16:56,600 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 64] total 64 [2021-10-13 00:16:56,601 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [714823193] [2021-10-13 00:16:56,601 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-10-13 00:16:56,601 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:16:56,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-10-13 00:16:56,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2021-10-13 00:16:56,604 INFO L87 Difference]: Start difference. First operand 69 states and 69 transitions. Second operand has 64 states, 64 states have (on average 1.0625) internal successors, (68), 64 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:16:56,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:16:56,669 INFO L93 Difference]: Finished difference Result 74 states and 74 transitions. [2021-10-13 00:16:56,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-10-13 00:16:56,669 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 1.0625) internal successors, (68), 64 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2021-10-13 00:16:56,670 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:16:56,670 INFO L225 Difference]: With dead ends: 74 [2021-10-13 00:16:56,670 INFO L226 Difference]: Without dead ends: 70 [2021-10-13 00:16:56,671 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 132 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1261.7ms TimeCoverageRelationStatistics Valid=2016, Invalid=2016, Unknown=0, NotChecked=0, Total=4032 [2021-10-13 00:16:56,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-10-13 00:16:56,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2021-10-13 00:16:56,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0144927536231885) internal successors, (70), 69 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:16:56,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 70 transitions. [2021-10-13 00:16:56,674 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 70 transitions. Word has length 68 [2021-10-13 00:16:56,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:16:56,674 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 70 transitions. [2021-10-13 00:16:56,675 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 1.0625) internal successors, (68), 64 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:16:56,675 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 70 transitions. [2021-10-13 00:16:56,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2021-10-13 00:16:56,675 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:16:56,676 INFO L512 BasicCegarLoop]: trace histogram [62, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:16:56,712 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-10-13 00:16:56,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:16:56,892 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:16:56,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:16:56,892 INFO L82 PathProgramCache]: Analyzing trace with hash 763241675, now seen corresponding path program 62 times [2021-10-13 00:16:56,892 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:16:56,892 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732635718] [2021-10-13 00:16:56,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:16:56,892 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:16:56,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:16:58,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:58,356 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:16:58,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732635718] [2021-10-13 00:16:58,356 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732635718] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:16:58,356 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253131527] [2021-10-13 00:16:58,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:16:58,357 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:16:58,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:16:58,377 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:16:58,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-10-13 00:16:59,212 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:16:59,212 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:16:59,214 INFO L263 TraceCheckSpWp]: Trace formula consists of 355 conjuncts, 64 conjunts are in the unsatisfiable core [2021-10-13 00:16:59,215 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:16:59,388 INFO L134 CoverageAnalysis]: Checked inductivity of 1953 backedges. 0 proven. 1953 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:16:59,389 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253131527] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:16:59,389 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:16:59,389 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65] total 65 [2021-10-13 00:16:59,389 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [892674559] [2021-10-13 00:16:59,389 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-10-13 00:16:59,390 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:16:59,390 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-10-13 00:16:59,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2021-10-13 00:16:59,391 INFO L87 Difference]: Start difference. First operand 70 states and 70 transitions. Second operand has 65 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 65 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) [2021-10-13 00:16:59,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:16:59,477 INFO L93 Difference]: Finished difference Result 75 states and 75 transitions. [2021-10-13 00:16:59,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2021-10-13 00:16:59,478 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 65 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 69 [2021-10-13 00:16:59,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:16:59,479 INFO L225 Difference]: With dead ends: 75 [2021-10-13 00:16:59,479 INFO L226 Difference]: Without dead ends: 71 [2021-10-13 00:16:59,480 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1275.1ms TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2021-10-13 00:16:59,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2021-10-13 00:16:59,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 71. [2021-10-13 00:16:59,482 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) [2021-10-13 00:16:59,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 71 transitions. [2021-10-13 00:16:59,482 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 71 transitions. Word has length 69 [2021-10-13 00:16:59,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:16:59,483 INFO L470 AbstractCegarLoop]: Abstraction has 71 states and 71 transitions. [2021-10-13 00:16:59,483 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 1.0615384615384615) internal successors, (69), 65 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) [2021-10-13 00:16:59,483 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 71 transitions. [2021-10-13 00:16:59,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2021-10-13 00:16:59,484 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:16:59,484 INFO L512 BasicCegarLoop]: trace histogram [63, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:16:59,507 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-10-13 00:16:59,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:16:59,685 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:16:59,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:16:59,685 INFO L82 PathProgramCache]: Analyzing trace with hash -2107646445, now seen corresponding path program 63 times [2021-10-13 00:16:59,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:16:59,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316142369] [2021-10-13 00:16:59,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:16:59,685 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:16:59,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:17:01,203 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:17:01,203 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:17:01,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316142369] [2021-10-13 00:17:01,203 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316142369] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:17:01,203 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [656465266] [2021-10-13 00:17:01,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 00:17:01,204 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:17:01,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:17:01,206 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:17:01,207 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-10-13 00:17:02,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 33 check-sat command(s) [2021-10-13 00:17:02,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:17:02,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 360 conjuncts, 65 conjunts are in the unsatisfiable core [2021-10-13 00:17:02,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:17:02,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2016 backedges. 0 proven. 2016 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:17:02,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [656465266] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:17:02,256 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:17:02,256 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [66, 66] total 66 [2021-10-13 00:17:02,257 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482420884] [2021-10-13 00:17:02,257 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2021-10-13 00:17:02,257 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:17:02,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2021-10-13 00:17:02,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2021-10-13 00:17:02,259 INFO L87 Difference]: Start difference. First operand 71 states and 71 transitions. Second operand has 66 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 66 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:17:02,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:17:02,331 INFO L93 Difference]: Finished difference Result 76 states and 76 transitions. [2021-10-13 00:17:02,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2021-10-13 00:17:02,332 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 66 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 70 [2021-10-13 00:17:02,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:17:02,332 INFO L225 Difference]: With dead ends: 76 [2021-10-13 00:17:02,333 INFO L226 Difference]: Without dead ends: 72 [2021-10-13 00:17:02,333 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1370.1ms TimeCoverageRelationStatistics Valid=2145, Invalid=2145, Unknown=0, NotChecked=0, Total=4290 [2021-10-13 00:17:02,333 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-13 00:17:02,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-10-13 00:17:02,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.0140845070422535) internal successors, (72), 71 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:17:02,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 72 transitions. [2021-10-13 00:17:02,336 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 72 transitions. Word has length 70 [2021-10-13 00:17:02,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:17:02,336 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 72 transitions. [2021-10-13 00:17:02,337 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 66 states have (on average 1.0606060606060606) internal successors, (70), 66 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:17:02,337 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 72 transitions. [2021-10-13 00:17:02,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2021-10-13 00:17:02,337 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:17:02,337 INFO L512 BasicCegarLoop]: trace histogram [64, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:17:02,361 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-10-13 00:17:02,538 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-10-13 00:17:02,538 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:17:02,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:17:02,539 INFO L82 PathProgramCache]: Analyzing trace with hash -910864949, now seen corresponding path program 64 times [2021-10-13 00:17:02,539 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:17:02,539 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [353117707] [2021-10-13 00:17:02,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:17:02,539 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:17:02,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:17:04,060 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:17:04,060 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:17:04,060 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [353117707] [2021-10-13 00:17:04,061 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [353117707] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:17:04,061 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [624483721] [2021-10-13 00:17:04,061 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 00:17:04,061 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:17:04,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:17:04,088 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:17:04,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-10-13 00:17:04,929 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 00:17:04,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:17:04,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 66 conjunts are in the unsatisfiable core [2021-10-13 00:17:04,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:17:05,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2080 backedges. 0 proven. 2080 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:17:05,150 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [624483721] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:17:05,150 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:17:05,150 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67] total 67 [2021-10-13 00:17:05,150 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [482287051] [2021-10-13 00:17:05,151 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2021-10-13 00:17:05,151 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:17:05,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2021-10-13 00:17:05,152 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2021-10-13 00:17:05,153 INFO L87 Difference]: Start difference. First operand 72 states and 72 transitions. Second operand has 67 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 67 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) [2021-10-13 00:17:05,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:17:05,216 INFO L93 Difference]: Finished difference Result 77 states and 77 transitions. [2021-10-13 00:17:05,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-10-13 00:17:05,217 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 67 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2021-10-13 00:17:05,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:17:05,217 INFO L225 Difference]: With dead ends: 77 [2021-10-13 00:17:05,217 INFO L226 Difference]: Without dead ends: 73 [2021-10-13 00:17:05,218 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 73 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1383.5ms TimeCoverageRelationStatistics Valid=2211, Invalid=2211, Unknown=0, NotChecked=0, Total=4422 [2021-10-13 00:17:05,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-10-13 00:17:05,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 73. [2021-10-13 00:17:05,220 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) [2021-10-13 00:17:05,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 73 transitions. [2021-10-13 00:17:05,221 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 73 transitions. Word has length 71 [2021-10-13 00:17:05,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:17:05,222 INFO L470 AbstractCegarLoop]: Abstraction has 73 states and 73 transitions. [2021-10-13 00:17:05,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 1.0597014925373134) internal successors, (71), 67 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) [2021-10-13 00:17:05,222 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 73 transitions. [2021-10-13 00:17:05,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 73 [2021-10-13 00:17:05,222 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:17:05,223 INFO L512 BasicCegarLoop]: trace histogram [65, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:17:05,248 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-10-13 00:17:05,431 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:17:05,432 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:17:05,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:17:05,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1829623059, now seen corresponding path program 65 times [2021-10-13 00:17:05,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:17:05,432 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834571078] [2021-10-13 00:17:05,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:17:05,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:17:05,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:17:07,011 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:17:07,012 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:17:07,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834571078] [2021-10-13 00:17:07,012 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834571078] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:17:07,012 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320919924] [2021-10-13 00:17:07,012 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 00:17:07,012 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:17:07,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:17:07,018 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:17:07,019 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-10-13 00:17:07,892 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 34 check-sat command(s) [2021-10-13 00:17:07,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:17:07,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 67 conjunts are in the unsatisfiable core [2021-10-13 00:17:07,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:17:08,082 INFO L134 CoverageAnalysis]: Checked inductivity of 2145 backedges. 0 proven. 2145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:17:08,083 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320919924] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:17:08,083 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:17:08,083 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [68, 68] total 68 [2021-10-13 00:17:08,083 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839229517] [2021-10-13 00:17:08,083 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2021-10-13 00:17:08,083 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:17:08,084 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2021-10-13 00:17:08,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2021-10-13 00:17:08,084 INFO L87 Difference]: Start difference. First operand 73 states and 73 transitions. Second operand has 68 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 68 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:17:08,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:17:08,138 INFO L93 Difference]: Finished difference Result 78 states and 78 transitions. [2021-10-13 00:17:08,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2021-10-13 00:17:08,138 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 68 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 72 [2021-10-13 00:17:08,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:17:08,139 INFO L225 Difference]: With dead ends: 78 [2021-10-13 00:17:08,139 INFO L226 Difference]: Without dead ends: 74 [2021-10-13 00:17:08,140 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 74 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1425.8ms TimeCoverageRelationStatistics Valid=2278, Invalid=2278, Unknown=0, NotChecked=0, Total=4556 [2021-10-13 00:17:08,140 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-10-13 00:17:08,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-10-13 00:17:08,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 1.0136986301369864) internal successors, (74), 73 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:17:08,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 74 transitions. [2021-10-13 00:17:08,143 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 74 transitions. Word has length 72 [2021-10-13 00:17:08,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:17:08,143 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 74 transitions. [2021-10-13 00:17:08,143 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 1.0588235294117647) internal successors, (72), 68 states have internal predecessors, (72), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:17:08,144 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 74 transitions. [2021-10-13 00:17:08,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 74 [2021-10-13 00:17:08,144 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:17:08,144 INFO L512 BasicCegarLoop]: trace histogram [66, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:17:08,167 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Ended with exit code 0 [2021-10-13 00:17:08,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:17:08,344 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:17:08,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:17:08,345 INFO L82 PathProgramCache]: Analyzing trace with hash 885405387, now seen corresponding path program 66 times [2021-10-13 00:17:08,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:17:08,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214191933] [2021-10-13 00:17:08,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:17:08,345 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:17:08,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:17:09,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:17:09,955 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:17:09,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214191933] [2021-10-13 00:17:09,955 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214191933] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:17:09,955 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082244164] [2021-10-13 00:17:09,955 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 00:17:09,955 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:17:09,955 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:17:09,956 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:17:09,959 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-10-13 00:17:10,865 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 34 check-sat command(s) [2021-10-13 00:17:10,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:17:10,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 68 conjunts are in the unsatisfiable core [2021-10-13 00:17:10,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:17:11,054 INFO L134 CoverageAnalysis]: Checked inductivity of 2211 backedges. 0 proven. 2211 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:17:11,054 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082244164] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:17:11,054 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:17:11,054 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69] total 69 [2021-10-13 00:17:11,054 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663863384] [2021-10-13 00:17:11,055 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 69 states [2021-10-13 00:17:11,055 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:17:11,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 69 interpolants. [2021-10-13 00:17:11,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2021-10-13 00:17:11,056 INFO L87 Difference]: Start difference. First operand 74 states and 74 transitions. Second operand has 69 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 69 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) [2021-10-13 00:17:11,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:17:11,120 INFO L93 Difference]: Finished difference Result 79 states and 79 transitions. [2021-10-13 00:17:11,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2021-10-13 00:17:11,120 INFO L78 Accepts]: Start accepts. Automaton has has 69 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 69 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 73 [2021-10-13 00:17:11,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:17:11,121 INFO L225 Difference]: With dead ends: 79 [2021-10-13 00:17:11,121 INFO L226 Difference]: Without dead ends: 75 [2021-10-13 00:17:11,121 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1474.3ms TimeCoverageRelationStatistics Valid=2346, Invalid=2346, Unknown=0, NotChecked=0, Total=4692 [2021-10-13 00:17:11,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2021-10-13 00:17:11,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 75. [2021-10-13 00:17:11,124 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) [2021-10-13 00:17:11,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 75 transitions. [2021-10-13 00:17:11,125 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 75 transitions. Word has length 73 [2021-10-13 00:17:11,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:17:11,125 INFO L470 AbstractCegarLoop]: Abstraction has 75 states and 75 transitions. [2021-10-13 00:17:11,146 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 69 states, 69 states have (on average 1.0579710144927537) internal successors, (73), 69 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) [2021-10-13 00:17:11,146 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 75 transitions. [2021-10-13 00:17:11,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 75 [2021-10-13 00:17:11,147 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:17:11,147 INFO L512 BasicCegarLoop]: trace histogram [67, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:17:11,185 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-10-13 00:17:11,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-10-13 00:17:11,361 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:17:11,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:17:11,361 INFO L82 PathProgramCache]: Analyzing trace with hash 1679428627, now seen corresponding path program 67 times [2021-10-13 00:17:11,361 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:17:11,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298650089] [2021-10-13 00:17:11,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:17:11,362 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:17:11,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:17:13,051 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:17:13,051 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:17:13,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298650089] [2021-10-13 00:17:13,051 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298650089] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:17:13,051 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [579178363] [2021-10-13 00:17:13,051 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 00:17:13,051 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:17:13,051 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:17:13,052 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:17:13,053 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-10-13 00:17:13,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:17:13,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 380 conjuncts, 69 conjunts are in the unsatisfiable core [2021-10-13 00:17:13,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:17:14,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2278 backedges. 0 proven. 2278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:17:14,158 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [579178363] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:17:14,158 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:17:14,158 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [70, 70] total 70 [2021-10-13 00:17:14,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082615263] [2021-10-13 00:17:14,159 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2021-10-13 00:17:14,159 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:17:14,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2021-10-13 00:17:14,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2021-10-13 00:17:14,161 INFO L87 Difference]: Start difference. First operand 75 states and 75 transitions. Second operand has 70 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 70 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:17:14,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:17:14,247 INFO L93 Difference]: Finished difference Result 80 states and 80 transitions. [2021-10-13 00:17:14,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-10-13 00:17:14,247 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 70 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 74 [2021-10-13 00:17:14,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:17:14,248 INFO L225 Difference]: With dead ends: 80 [2021-10-13 00:17:14,248 INFO L226 Difference]: Without dead ends: 76 [2021-10-13 00:17:14,248 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 76 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1540.5ms TimeCoverageRelationStatistics Valid=2415, Invalid=2415, Unknown=0, NotChecked=0, Total=4830 [2021-10-13 00:17:14,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2021-10-13 00:17:14,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 76. [2021-10-13 00:17:14,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.0133333333333334) internal successors, (76), 75 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:17:14,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 76 transitions. [2021-10-13 00:17:14,254 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 76 transitions. Word has length 74 [2021-10-13 00:17:14,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:17:14,254 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 76 transitions. [2021-10-13 00:17:14,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 1.0571428571428572) internal successors, (74), 70 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:17:14,255 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 76 transitions. [2021-10-13 00:17:14,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2021-10-13 00:17:14,255 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:17:14,255 INFO L512 BasicCegarLoop]: trace histogram [68, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:17:14,293 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-10-13 00:17:14,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-10-13 00:17:14,470 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:17:14,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:17:14,470 INFO L82 PathProgramCache]: Analyzing trace with hash 524345291, now seen corresponding path program 68 times [2021-10-13 00:17:14,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:17:14,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563771849] [2021-10-13 00:17:14,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:17:14,470 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:17:14,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:17:16,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:17:16,278 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:17:16,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563771849] [2021-10-13 00:17:16,278 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563771849] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:17:16,278 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [924579783] [2021-10-13 00:17:16,279 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:17:16,279 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:17:16,279 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:17:16,280 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:17:16,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-10-13 00:17:17,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:17:17,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:17:17,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 385 conjuncts, 70 conjunts are in the unsatisfiable core [2021-10-13 00:17:17,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:17:17,454 INFO L134 CoverageAnalysis]: Checked inductivity of 2346 backedges. 0 proven. 2346 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:17:17,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [924579783] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:17:17,455 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:17:17,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71] total 71 [2021-10-13 00:17:17,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1347464558] [2021-10-13 00:17:17,456 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 71 states [2021-10-13 00:17:17,456 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:17:17,457 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 71 interpolants. [2021-10-13 00:17:17,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2021-10-13 00:17:17,458 INFO L87 Difference]: Start difference. First operand 76 states and 76 transitions. Second operand has 71 states, 71 states have (on average 1.056338028169014) internal successors, (75), 71 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) [2021-10-13 00:17:17,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:17:17,540 INFO L93 Difference]: Finished difference Result 81 states and 81 transitions. [2021-10-13 00:17:17,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2021-10-13 00:17:17,541 INFO L78 Accepts]: Start accepts. Automaton has has 71 states, 71 states have (on average 1.056338028169014) internal successors, (75), 71 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 75 [2021-10-13 00:17:17,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:17:17,542 INFO L225 Difference]: With dead ends: 81 [2021-10-13 00:17:17,542 INFO L226 Difference]: Without dead ends: 77 [2021-10-13 00:17:17,543 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 146 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1648.2ms TimeCoverageRelationStatistics Valid=2485, Invalid=2485, Unknown=0, NotChecked=0, Total=4970 [2021-10-13 00:17:17,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2021-10-13 00:17:17,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 77. [2021-10-13 00:17:17,547 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) [2021-10-13 00:17:17,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 77 transitions. [2021-10-13 00:17:17,548 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 77 transitions. Word has length 75 [2021-10-13 00:17:17,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:17:17,548 INFO L470 AbstractCegarLoop]: Abstraction has 77 states and 77 transitions. [2021-10-13 00:17:17,549 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 71 states, 71 states have (on average 1.056338028169014) internal successors, (75), 71 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) [2021-10-13 00:17:17,549 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 77 transitions. [2021-10-13 00:17:17,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 77 [2021-10-13 00:17:17,549 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:17:17,550 INFO L512 BasicCegarLoop]: trace histogram [69, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:17:17,587 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-10-13 00:17:17,766 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-10-13 00:17:17,767 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:17:17,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:17:17,767 INFO L82 PathProgramCache]: Analyzing trace with hash -923499757, now seen corresponding path program 69 times [2021-10-13 00:17:17,767 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:17:17,767 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066075109] [2021-10-13 00:17:17,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:17:17,767 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:17:17,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:17:19,507 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:17:19,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:17:19,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066075109] [2021-10-13 00:17:19,507 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1066075109] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:17:19,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531930800] [2021-10-13 00:17:19,508 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 00:17:19,508 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:17:19,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:17:19,508 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:17:19,509 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-10-13 00:17:20,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 36 check-sat command(s) [2021-10-13 00:17:20,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:17:20,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 390 conjuncts, 71 conjunts are in the unsatisfiable core [2021-10-13 00:17:20,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:17:20,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2415 backedges. 0 proven. 2415 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:17:20,700 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531930800] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:17:20,700 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:17:20,701 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [72, 72] total 72 [2021-10-13 00:17:20,701 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035230525] [2021-10-13 00:17:20,701 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2021-10-13 00:17:20,701 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:17:20,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2021-10-13 00:17:20,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2021-10-13 00:17:20,702 INFO L87 Difference]: Start difference. First operand 77 states and 77 transitions. Second operand has 72 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 72 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:17:20,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:17:20,761 INFO L93 Difference]: Finished difference Result 82 states and 82 transitions. [2021-10-13 00:17:20,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2021-10-13 00:17:20,762 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 72 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 76 [2021-10-13 00:17:20,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:17:20,762 INFO L225 Difference]: With dead ends: 82 [2021-10-13 00:17:20,762 INFO L226 Difference]: Without dead ends: 78 [2021-10-13 00:17:20,763 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 148 GetRequests, 78 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1581.6ms TimeCoverageRelationStatistics Valid=2556, Invalid=2556, Unknown=0, NotChecked=0, Total=5112 [2021-10-13 00:17:20,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-10-13 00:17:20,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 78. [2021-10-13 00:17:20,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.0129870129870129) internal successors, (78), 77 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:17:20,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 78 transitions. [2021-10-13 00:17:20,765 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 78 transitions. Word has length 76 [2021-10-13 00:17:20,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:17:20,765 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 78 transitions. [2021-10-13 00:17:20,765 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 1.0555555555555556) internal successors, (76), 72 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:17:20,765 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 78 transitions. [2021-10-13 00:17:20,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2021-10-13 00:17:20,766 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:17:20,766 INFO L512 BasicCegarLoop]: trace histogram [70, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:17:20,806 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Ended with exit code 0 [2021-10-13 00:17:20,982 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:17:20,982 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:17:20,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:17:20,983 INFO L82 PathProgramCache]: Analyzing trace with hash 1437944011, now seen corresponding path program 70 times [2021-10-13 00:17:20,983 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:17:20,983 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [183854158] [2021-10-13 00:17:20,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:17:20,984 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:17:21,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:17:22,731 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:17:22,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:17:22,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [183854158] [2021-10-13 00:17:22,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [183854158] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:17:22,732 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937246125] [2021-10-13 00:17:22,732 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 00:17:22,732 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:17:22,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:17:22,733 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:17:22,750 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-10-13 00:17:23,728 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 00:17:23,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:17:23,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 395 conjuncts, 72 conjunts are in the unsatisfiable core [2021-10-13 00:17:23,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:17:23,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2485 backedges. 0 proven. 2485 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:17:23,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937246125] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:17:23,931 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:17:23,932 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73] total 73 [2021-10-13 00:17:23,932 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060957072] [2021-10-13 00:17:23,932 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2021-10-13 00:17:23,932 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:17:23,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2021-10-13 00:17:23,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2021-10-13 00:17:23,933 INFO L87 Difference]: Start difference. First operand 78 states and 78 transitions. Second operand has 73 states, 73 states have (on average 1.0547945205479452) internal successors, (77), 73 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) [2021-10-13 00:17:23,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:17:23,994 INFO L93 Difference]: Finished difference Result 83 states and 83 transitions. [2021-10-13 00:17:23,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-10-13 00:17:23,994 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 1.0547945205479452) internal successors, (77), 73 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 77 [2021-10-13 00:17:23,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:17:23,995 INFO L225 Difference]: With dead ends: 83 [2021-10-13 00:17:23,995 INFO L226 Difference]: Without dead ends: 79 [2021-10-13 00:17:23,995 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 150 GetRequests, 79 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1601.3ms TimeCoverageRelationStatistics Valid=2628, Invalid=2628, Unknown=0, NotChecked=0, Total=5256 [2021-10-13 00:17:23,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2021-10-13 00:17:23,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 79. [2021-10-13 00:17:23,998 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) [2021-10-13 00:17:23,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 79 transitions. [2021-10-13 00:17:23,998 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 79 transitions. Word has length 77 [2021-10-13 00:17:23,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:17:23,998 INFO L470 AbstractCegarLoop]: Abstraction has 79 states and 79 transitions. [2021-10-13 00:17:23,999 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 1.0547945205479452) internal successors, (77), 73 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) [2021-10-13 00:17:23,999 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 79 transitions. [2021-10-13 00:17:23,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 79 [2021-10-13 00:17:23,999 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:17:24,000 INFO L512 BasicCegarLoop]: trace histogram [71, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:17:24,024 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Ended with exit code 0 [2021-10-13 00:17:24,219 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:17:24,220 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:17:24,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:17:24,221 INFO L82 PathProgramCache]: Analyzing trace with hash 1628256787, now seen corresponding path program 71 times [2021-10-13 00:17:24,221 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:17:24,221 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854386453] [2021-10-13 00:17:24,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:17:24,221 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:17:24,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:17:26,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:17:26,056 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:17:26,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854386453] [2021-10-13 00:17:26,056 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [854386453] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:17:26,056 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1279636152] [2021-10-13 00:17:26,056 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 00:17:26,056 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:17:26,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:17:26,057 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:17:26,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-10-13 00:17:27,066 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 37 check-sat command(s) [2021-10-13 00:17:27,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:17:27,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 400 conjuncts, 73 conjunts are in the unsatisfiable core [2021-10-13 00:17:27,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:17:27,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2556 backedges. 0 proven. 2556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:17:27,292 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1279636152] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:17:27,292 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:17:27,292 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [74, 74] total 74 [2021-10-13 00:17:27,292 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444345440] [2021-10-13 00:17:27,293 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2021-10-13 00:17:27,293 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:17:27,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2021-10-13 00:17:27,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2021-10-13 00:17:27,295 INFO L87 Difference]: Start difference. First operand 79 states and 79 transitions. Second operand has 74 states, 74 states have (on average 1.054054054054054) internal successors, (78), 74 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:17:27,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:17:27,373 INFO L93 Difference]: Finished difference Result 84 states and 84 transitions. [2021-10-13 00:17:27,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2021-10-13 00:17:27,373 INFO L78 Accepts]: Start accepts. Automaton has has 74 states, 74 states have (on average 1.054054054054054) internal successors, (78), 74 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 78 [2021-10-13 00:17:27,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:17:27,374 INFO L225 Difference]: With dead ends: 84 [2021-10-13 00:17:27,374 INFO L226 Difference]: Without dead ends: 80 [2021-10-13 00:17:27,374 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 152 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 72 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1694.1ms TimeCoverageRelationStatistics Valid=2701, Invalid=2701, Unknown=0, NotChecked=0, Total=5402 [2021-10-13 00:17:27,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-10-13 00:17:27,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 80. [2021-10-13 00:17:27,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0126582278481013) internal successors, (80), 79 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:17:27,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 80 transitions. [2021-10-13 00:17:27,377 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 80 transitions. Word has length 78 [2021-10-13 00:17:27,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:17:27,377 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 80 transitions. [2021-10-13 00:17:27,378 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 1.054054054054054) internal successors, (78), 74 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:17:27,378 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 80 transitions. [2021-10-13 00:17:27,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2021-10-13 00:17:27,378 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:17:27,379 INFO L512 BasicCegarLoop]: trace histogram [72, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:17:27,415 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Ended with exit code 0 [2021-10-13 00:17:27,603 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:17:27,604 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:17:27,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:17:27,604 INFO L82 PathProgramCache]: Analyzing trace with hash -1061981749, now seen corresponding path program 72 times [2021-10-13 00:17:27,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:17:27,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57188367] [2021-10-13 00:17:27,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:17:27,604 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:17:27,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:17:29,446 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:17:29,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:17:29,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57188367] [2021-10-13 00:17:29,446 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [57188367] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:17:29,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430660949] [2021-10-13 00:17:29,447 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 00:17:29,447 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:17:29,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:17:29,452 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:17:29,453 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-10-13 00:17:30,505 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 37 check-sat command(s) [2021-10-13 00:17:30,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:17:30,508 INFO L263 TraceCheckSpWp]: Trace formula consists of 405 conjuncts, 74 conjunts are in the unsatisfiable core [2021-10-13 00:17:30,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:17:30,721 INFO L134 CoverageAnalysis]: Checked inductivity of 2628 backedges. 0 proven. 2628 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:17:30,721 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430660949] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:17:30,721 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:17:30,721 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75] total 75 [2021-10-13 00:17:30,721 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412214278] [2021-10-13 00:17:30,721 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-10-13 00:17:30,722 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:17:30,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-10-13 00:17:30,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2021-10-13 00:17:30,723 INFO L87 Difference]: Start difference. First operand 80 states and 80 transitions. Second operand has 75 states, 75 states have (on average 1.0533333333333332) internal successors, (79), 75 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) [2021-10-13 00:17:30,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:17:30,780 INFO L93 Difference]: Finished difference Result 85 states and 85 transitions. [2021-10-13 00:17:30,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-10-13 00:17:30,780 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 1.0533333333333332) internal successors, (79), 75 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 79 [2021-10-13 00:17:30,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:17:30,781 INFO L225 Difference]: With dead ends: 85 [2021-10-13 00:17:30,781 INFO L226 Difference]: Without dead ends: 81 [2021-10-13 00:17:30,781 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 81 SyntacticMatches, 0 SemanticMatches, 73 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1704.8ms TimeCoverageRelationStatistics Valid=2775, Invalid=2775, Unknown=0, NotChecked=0, Total=5550 [2021-10-13 00:17:30,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2021-10-13 00:17:30,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 81. [2021-10-13 00:17:30,784 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) [2021-10-13 00:17:30,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 81 transitions. [2021-10-13 00:17:30,785 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 81 transitions. Word has length 79 [2021-10-13 00:17:30,785 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:17:30,785 INFO L470 AbstractCegarLoop]: Abstraction has 81 states and 81 transitions. [2021-10-13 00:17:30,785 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 1.0533333333333332) internal successors, (79), 75 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) [2021-10-13 00:17:30,786 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 81 transitions. [2021-10-13 00:17:30,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 81 [2021-10-13 00:17:30,786 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:17:30,786 INFO L512 BasicCegarLoop]: trace histogram [73, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:17:30,817 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Ended with exit code 0 [2021-10-13 00:17:31,003 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2021-10-13 00:17:31,004 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:17:31,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:17:31,004 INFO L82 PathProgramCache]: Analyzing trace with hash 1439969555, now seen corresponding path program 73 times [2021-10-13 00:17:31,004 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:17:31,004 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970350131] [2021-10-13 00:17:31,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:17:31,004 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:17:31,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:17:32,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:17:32,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:17:32,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970350131] [2021-10-13 00:17:32,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970350131] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:17:32,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460649775] [2021-10-13 00:17:32,894 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 00:17:32,894 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:17:32,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:17:32,895 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:17:32,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-10-13 00:17:33,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:17:33,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 410 conjuncts, 75 conjunts are in the unsatisfiable core [2021-10-13 00:17:33,964 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:17:34,176 INFO L134 CoverageAnalysis]: Checked inductivity of 2701 backedges. 0 proven. 2701 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:17:34,176 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460649775] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:17:34,176 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:17:34,176 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [76, 76] total 76 [2021-10-13 00:17:34,176 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782535636] [2021-10-13 00:17:34,177 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2021-10-13 00:17:34,177 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:17:34,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2021-10-13 00:17:34,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2021-10-13 00:17:34,178 INFO L87 Difference]: Start difference. First operand 81 states and 81 transitions. Second operand has 76 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 76 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:17:34,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:17:34,240 INFO L93 Difference]: Finished difference Result 86 states and 86 transitions. [2021-10-13 00:17:34,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2021-10-13 00:17:34,240 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 76 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 80 [2021-10-13 00:17:34,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:17:34,241 INFO L225 Difference]: With dead ends: 86 [2021-10-13 00:17:34,241 INFO L226 Difference]: Without dead ends: 82 [2021-10-13 00:17:34,241 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 156 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1731.2ms TimeCoverageRelationStatistics Valid=2850, Invalid=2850, Unknown=0, NotChecked=0, Total=5700 [2021-10-13 00:17:34,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2021-10-13 00:17:34,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 82. [2021-10-13 00:17:34,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.0123456790123457) internal successors, (82), 81 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:17:34,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 82 transitions. [2021-10-13 00:17:34,244 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 82 transitions. Word has length 80 [2021-10-13 00:17:34,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:17:34,244 INFO L470 AbstractCegarLoop]: Abstraction has 82 states and 82 transitions. [2021-10-13 00:17:34,244 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 1.0526315789473684) internal successors, (80), 76 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:17:34,244 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 82 transitions. [2021-10-13 00:17:34,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2021-10-13 00:17:34,245 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:17:34,245 INFO L512 BasicCegarLoop]: trace histogram [74, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:17:34,270 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Ended with exit code 0 [2021-10-13 00:17:34,451 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:17:34,452 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:17:34,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:17:34,452 INFO L82 PathProgramCache]: Analyzing trace with hash 1691048651, now seen corresponding path program 74 times [2021-10-13 00:17:34,452 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:17:34,452 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275458058] [2021-10-13 00:17:34,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:17:34,452 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:17:34,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:17:36,430 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:17:36,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:17:36,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275458058] [2021-10-13 00:17:36,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275458058] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:17:36,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278271725] [2021-10-13 00:17:36,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:17:36,430 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:17:36,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:17:36,431 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:17:36,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-10-13 00:17:37,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:17:37,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:17:37,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 415 conjuncts, 76 conjunts are in the unsatisfiable core [2021-10-13 00:17:37,531 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:17:37,751 INFO L134 CoverageAnalysis]: Checked inductivity of 2775 backedges. 0 proven. 2775 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:17:37,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278271725] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:17:37,752 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:17:37,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77] total 77 [2021-10-13 00:17:37,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762350565] [2021-10-13 00:17:37,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2021-10-13 00:17:37,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:17:37,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2021-10-13 00:17:37,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2021-10-13 00:17:37,755 INFO L87 Difference]: Start difference. First operand 82 states and 82 transitions. Second operand has 77 states, 77 states have (on average 1.051948051948052) internal successors, (81), 77 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) [2021-10-13 00:17:37,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:17:37,837 INFO L93 Difference]: Finished difference Result 87 states and 87 transitions. [2021-10-13 00:17:37,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2021-10-13 00:17:37,837 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 1.051948051948052) internal successors, (81), 77 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 81 [2021-10-13 00:17:37,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:17:37,838 INFO L225 Difference]: With dead ends: 87 [2021-10-13 00:17:37,838 INFO L226 Difference]: Without dead ends: 83 [2021-10-13 00:17:37,839 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 83 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1821.8ms TimeCoverageRelationStatistics Valid=2926, Invalid=2926, Unknown=0, NotChecked=0, Total=5852 [2021-10-13 00:17:37,839 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-10-13 00:17:37,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 83. [2021-10-13 00:17:37,842 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) [2021-10-13 00:17:37,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 83 transitions. [2021-10-13 00:17:37,842 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 83 transitions. Word has length 81 [2021-10-13 00:17:37,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:17:37,843 INFO L470 AbstractCegarLoop]: Abstraction has 83 states and 83 transitions. [2021-10-13 00:17:37,843 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 1.051948051948052) internal successors, (81), 77 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) [2021-10-13 00:17:37,843 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 83 transitions. [2021-10-13 00:17:37,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2021-10-13 00:17:37,844 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:17:37,844 INFO L512 BasicCegarLoop]: trace histogram [75, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:17:37,883 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-10-13 00:17:38,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:17:38,068 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:17:38,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:17:38,068 INFO L82 PathProgramCache]: Analyzing trace with hash 884566035, now seen corresponding path program 75 times [2021-10-13 00:17:38,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:17:38,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344111723] [2021-10-13 00:17:38,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:17:38,068 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:17:38,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:17:40,181 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:17:40,181 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:17:40,181 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344111723] [2021-10-13 00:17:40,181 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344111723] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:17:40,182 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227444652] [2021-10-13 00:17:40,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 00:17:40,182 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:17:40,182 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:17:40,183 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:17:40,183 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-10-13 00:17:41,341 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 39 check-sat command(s) [2021-10-13 00:17:41,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:17:41,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 420 conjuncts, 77 conjunts are in the unsatisfiable core [2021-10-13 00:17:41,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:17:41,586 INFO L134 CoverageAnalysis]: Checked inductivity of 2850 backedges. 0 proven. 2850 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:17:41,586 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [227444652] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:17:41,586 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:17:41,587 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [78, 78] total 78 [2021-10-13 00:17:41,587 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069064595] [2021-10-13 00:17:41,587 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2021-10-13 00:17:41,587 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:17:41,588 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2021-10-13 00:17:41,588 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2021-10-13 00:17:41,589 INFO L87 Difference]: Start difference. First operand 83 states and 83 transitions. Second operand has 78 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 78 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:17:41,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:17:41,657 INFO L93 Difference]: Finished difference Result 88 states and 88 transitions. [2021-10-13 00:17:41,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2021-10-13 00:17:41,658 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 78 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 82 [2021-10-13 00:17:41,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:17:41,658 INFO L225 Difference]: With dead ends: 88 [2021-10-13 00:17:41,658 INFO L226 Difference]: Without dead ends: 84 [2021-10-13 00:17:41,659 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 160 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1947.9ms TimeCoverageRelationStatistics Valid=3003, Invalid=3003, Unknown=0, NotChecked=0, Total=6006 [2021-10-13 00:17:41,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-10-13 00:17:41,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 84. [2021-10-13 00:17:41,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.0120481927710843) internal successors, (84), 83 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:17:41,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 84 transitions. [2021-10-13 00:17:41,663 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 84 transitions. Word has length 82 [2021-10-13 00:17:41,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:17:41,663 INFO L470 AbstractCegarLoop]: Abstraction has 84 states and 84 transitions. [2021-10-13 00:17:41,664 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 1.0512820512820513) internal successors, (82), 78 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:17:41,664 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 84 transitions. [2021-10-13 00:17:41,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2021-10-13 00:17:41,664 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:17:41,665 INFO L512 BasicCegarLoop]: trace histogram [76, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:17:41,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Forceful destruction successful, exit code 0 [2021-10-13 00:17:41,875 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-10-13 00:17:41,876 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:17:41,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:17:41,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1653408715, now seen corresponding path program 76 times [2021-10-13 00:17:41,876 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:17:41,876 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980533950] [2021-10-13 00:17:41,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:17:41,877 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:17:41,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:17:43,983 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:17:43,983 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:17:43,983 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980533950] [2021-10-13 00:17:43,984 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1980533950] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:17:43,984 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216821889] [2021-10-13 00:17:43,984 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 00:17:43,984 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:17:43,984 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:17:44,007 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:17:44,008 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-10-13 00:17:45,139 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 00:17:45,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:17:45,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 425 conjuncts, 78 conjunts are in the unsatisfiable core [2021-10-13 00:17:45,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:17:45,399 INFO L134 CoverageAnalysis]: Checked inductivity of 2926 backedges. 0 proven. 2926 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:17:45,400 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [216821889] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:17:45,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:17:45,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [79, 79] total 79 [2021-10-13 00:17:45,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [848363848] [2021-10-13 00:17:45,401 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2021-10-13 00:17:45,401 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:17:45,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2021-10-13 00:17:45,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2021-10-13 00:17:45,403 INFO L87 Difference]: Start difference. First operand 84 states and 84 transitions. Second operand has 79 states, 79 states have (on average 1.0506329113924051) internal successors, (83), 79 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) [2021-10-13 00:17:45,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:17:45,494 INFO L93 Difference]: Finished difference Result 89 states and 89 transitions. [2021-10-13 00:17:45,494 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 79 states. [2021-10-13 00:17:45,494 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 1.0506329113924051) internal successors, (83), 79 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 83 [2021-10-13 00:17:45,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:17:45,495 INFO L225 Difference]: With dead ends: 89 [2021-10-13 00:17:45,496 INFO L226 Difference]: Without dead ends: 85 [2021-10-13 00:17:45,496 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 162 GetRequests, 85 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1906.1ms TimeCoverageRelationStatistics Valid=3081, Invalid=3081, Unknown=0, NotChecked=0, Total=6162 [2021-10-13 00:17:45,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-10-13 00:17:45,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 85. [2021-10-13 00:17:45,499 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) [2021-10-13 00:17:45,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 85 transitions. [2021-10-13 00:17:45,500 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 85 transitions. Word has length 83 [2021-10-13 00:17:45,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:17:45,500 INFO L470 AbstractCegarLoop]: Abstraction has 85 states and 85 transitions. [2021-10-13 00:17:45,500 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 1.0506329113924051) internal successors, (83), 79 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) [2021-10-13 00:17:45,500 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 85 transitions. [2021-10-13 00:17:45,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 85 [2021-10-13 00:17:45,501 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:17:45,501 INFO L512 BasicCegarLoop]: trace histogram [77, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:17:45,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Forceful destruction successful, exit code 0 [2021-10-13 00:17:45,723 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-10-13 00:17:45,724 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:17:45,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:17:45,724 INFO L82 PathProgramCache]: Analyzing trace with hash -282271981, now seen corresponding path program 77 times [2021-10-13 00:17:45,724 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:17:45,724 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340691841] [2021-10-13 00:17:45,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:17:45,724 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:17:45,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:17:47,882 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:17:47,882 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:17:47,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340691841] [2021-10-13 00:17:47,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340691841] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:17:47,882 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [780480196] [2021-10-13 00:17:47,882 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 00:17:47,882 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:17:47,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:17:47,883 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:17:47,884 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-10-13 00:17:49,054 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 40 check-sat command(s) [2021-10-13 00:17:49,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:17:49,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 430 conjuncts, 79 conjunts are in the unsatisfiable core [2021-10-13 00:17:49,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:17:49,295 INFO L134 CoverageAnalysis]: Checked inductivity of 3003 backedges. 0 proven. 3003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:17:49,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [780480196] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:17:49,296 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:17:49,296 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [80, 80] total 80 [2021-10-13 00:17:49,296 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275995156] [2021-10-13 00:17:49,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2021-10-13 00:17:49,297 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:17:49,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2021-10-13 00:17:49,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2021-10-13 00:17:49,299 INFO L87 Difference]: Start difference. First operand 85 states and 85 transitions. Second operand has 80 states, 80 states have (on average 1.05) internal successors, (84), 80 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:17:49,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:17:49,387 INFO L93 Difference]: Finished difference Result 90 states and 90 transitions. [2021-10-13 00:17:49,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2021-10-13 00:17:49,388 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 1.05) internal successors, (84), 80 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 84 [2021-10-13 00:17:49,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:17:49,388 INFO L225 Difference]: With dead ends: 90 [2021-10-13 00:17:49,389 INFO L226 Difference]: Without dead ends: 86 [2021-10-13 00:17:49,389 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 86 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1984.7ms TimeCoverageRelationStatistics Valid=3160, Invalid=3160, Unknown=0, NotChecked=0, Total=6320 [2021-10-13 00:17:49,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-10-13 00:17:49,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 86. [2021-10-13 00:17:49,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.011764705882353) internal successors, (86), 85 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:17:49,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 86 transitions. [2021-10-13 00:17:49,393 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 86 transitions. Word has length 84 [2021-10-13 00:17:49,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:17:49,393 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 86 transitions. [2021-10-13 00:17:49,393 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 1.05) internal successors, (84), 80 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:17:49,393 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 86 transitions. [2021-10-13 00:17:49,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 86 [2021-10-13 00:17:49,394 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:17:49,394 INFO L512 BasicCegarLoop]: trace histogram [78, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:17:49,434 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-10-13 00:17:49,607 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-10-13 00:17:49,608 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:17:49,608 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:17:49,608 INFO L82 PathProgramCache]: Analyzing trace with hash -158831413, now seen corresponding path program 78 times [2021-10-13 00:17:49,608 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:17:49,608 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031356523] [2021-10-13 00:17:49,608 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:17:49,608 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:17:49,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:17:51,771 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:17:51,772 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:17:51,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031356523] [2021-10-13 00:17:51,772 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031356523] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:17:51,772 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459325869] [2021-10-13 00:17:51,772 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 00:17:51,772 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:17:51,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:17:51,773 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:17:51,774 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-10-13 00:17:53,001 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 40 check-sat command(s) [2021-10-13 00:17:53,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:17:53,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 80 conjunts are in the unsatisfiable core [2021-10-13 00:17:53,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:17:53,294 INFO L134 CoverageAnalysis]: Checked inductivity of 3081 backedges. 0 proven. 3081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:17:53,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459325869] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:17:53,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:17:53,295 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [81, 81] total 81 [2021-10-13 00:17:53,295 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080945090] [2021-10-13 00:17:53,295 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 81 states [2021-10-13 00:17:53,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:17:53,297 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 81 interpolants. [2021-10-13 00:17:53,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2021-10-13 00:17:53,298 INFO L87 Difference]: Start difference. First operand 86 states and 86 transitions. Second operand has 81 states, 81 states have (on average 1.0493827160493827) internal successors, (85), 81 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) [2021-10-13 00:17:53,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:17:53,409 INFO L93 Difference]: Finished difference Result 91 states and 91 transitions. [2021-10-13 00:17:53,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-10-13 00:17:53,410 INFO L78 Accepts]: Start accepts. Automaton has has 81 states, 81 states have (on average 1.0493827160493827) internal successors, (85), 81 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 85 [2021-10-13 00:17:53,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:17:53,411 INFO L225 Difference]: With dead ends: 91 [2021-10-13 00:17:53,411 INFO L226 Difference]: Without dead ends: 87 [2021-10-13 00:17:53,412 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1971.7ms TimeCoverageRelationStatistics Valid=3240, Invalid=3240, Unknown=0, NotChecked=0, Total=6480 [2021-10-13 00:17:53,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2021-10-13 00:17:53,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 87. [2021-10-13 00:17:53,416 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) [2021-10-13 00:17:53,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 87 transitions. [2021-10-13 00:17:53,417 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 87 transitions. Word has length 85 [2021-10-13 00:17:53,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:17:53,417 INFO L470 AbstractCegarLoop]: Abstraction has 87 states and 87 transitions. [2021-10-13 00:17:53,417 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 81 states, 81 states have (on average 1.0493827160493827) internal successors, (85), 81 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) [2021-10-13 00:17:53,417 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 87 transitions. [2021-10-13 00:17:53,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 87 [2021-10-13 00:17:53,418 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:17:53,418 INFO L512 BasicCegarLoop]: trace histogram [79, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:17:53,459 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-10-13 00:17:53,632 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:17:53,632 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:17:53,633 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:17:53,633 INFO L82 PathProgramCache]: Analyzing trace with hash -627141101, now seen corresponding path program 79 times [2021-10-13 00:17:53,633 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:17:53,633 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915973539] [2021-10-13 00:17:53,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:17:53,633 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:17:53,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:17:55,930 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:17:55,930 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:17:55,930 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915973539] [2021-10-13 00:17:55,931 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [915973539] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:17:55,931 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1960573728] [2021-10-13 00:17:55,931 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 00:17:55,931 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:17:55,931 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:17:55,932 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:17:55,932 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-10-13 00:17:57,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:17:57,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 440 conjuncts, 81 conjunts are in the unsatisfiable core [2021-10-13 00:17:57,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:17:57,434 INFO L134 CoverageAnalysis]: Checked inductivity of 3160 backedges. 0 proven. 3160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:17:57,434 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1960573728] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:17:57,434 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:17:57,434 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [82, 82] total 82 [2021-10-13 00:17:57,434 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801485841] [2021-10-13 00:17:57,435 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2021-10-13 00:17:57,435 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:17:57,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2021-10-13 00:17:57,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2021-10-13 00:17:57,437 INFO L87 Difference]: Start difference. First operand 87 states and 87 transitions. Second operand has 82 states, 82 states have (on average 1.048780487804878) internal successors, (86), 82 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:17:57,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:17:57,509 INFO L93 Difference]: Finished difference Result 92 states and 92 transitions. [2021-10-13 00:17:57,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-10-13 00:17:57,509 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 1.048780487804878) internal successors, (86), 82 states have internal predecessors, (86), 0 states have call successors, (0), 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 [2021-10-13 00:17:57,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:17:57,510 INFO L225 Difference]: With dead ends: 92 [2021-10-13 00:17:57,510 INFO L226 Difference]: Without dead ends: 88 [2021-10-13 00:17:57,510 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 88 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2118.6ms TimeCoverageRelationStatistics Valid=3321, Invalid=3321, Unknown=0, NotChecked=0, Total=6642 [2021-10-13 00:17:57,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-10-13 00:17:57,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 88. [2021-10-13 00:17:57,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.0114942528735633) internal successors, (88), 87 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:17:57,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 88 transitions. [2021-10-13 00:17:57,513 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 88 transitions. Word has length 86 [2021-10-13 00:17:57,513 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:17:57,513 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 88 transitions. [2021-10-13 00:17:57,513 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 1.048780487804878) internal successors, (86), 82 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:17:57,513 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 88 transitions. [2021-10-13 00:17:57,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-10-13 00:17:57,514 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:17:57,514 INFO L512 BasicCegarLoop]: trace histogram [80, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:17:57,540 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-10-13 00:17:57,715 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:17:57,716 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:17:57,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:17:57,719 INFO L82 PathProgramCache]: Analyzing trace with hash 2035127755, now seen corresponding path program 80 times [2021-10-13 00:17:57,719 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:17:57,719 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [227713618] [2021-10-13 00:17:57,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:17:57,720 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:17:57,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:18:00,042 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:18:00,042 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:18:00,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [227713618] [2021-10-13 00:18:00,042 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [227713618] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:18:00,042 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112022747] [2021-10-13 00:18:00,042 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:18:00,042 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:18:00,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:18:00,043 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:18:00,044 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-10-13 00:18:01,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:18:01,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:18:01,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 445 conjuncts, 82 conjunts are in the unsatisfiable core [2021-10-13 00:18:01,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:18:01,557 INFO L134 CoverageAnalysis]: Checked inductivity of 3240 backedges. 0 proven. 3240 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:18:01,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2112022747] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:18:01,557 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:18:01,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [83, 83] total 83 [2021-10-13 00:18:01,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521889331] [2021-10-13 00:18:01,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 83 states [2021-10-13 00:18:01,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:18:01,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 83 interpolants. [2021-10-13 00:18:01,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2021-10-13 00:18:01,561 INFO L87 Difference]: Start difference. First operand 88 states and 88 transitions. Second operand has 83 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 83 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) [2021-10-13 00:18:01,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:18:01,658 INFO L93 Difference]: Finished difference Result 93 states and 93 transitions. [2021-10-13 00:18:01,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2021-10-13 00:18:01,658 INFO L78 Accepts]: Start accepts. Automaton has has 83 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 83 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 87 [2021-10-13 00:18:01,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:18:01,660 INFO L225 Difference]: With dead ends: 93 [2021-10-13 00:18:01,660 INFO L226 Difference]: Without dead ends: 89 [2021-10-13 00:18:01,661 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 170 GetRequests, 89 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2137.8ms TimeCoverageRelationStatistics Valid=3403, Invalid=3403, Unknown=0, NotChecked=0, Total=6806 [2021-10-13 00:18:01,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2021-10-13 00:18:01,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 89. [2021-10-13 00:18:01,664 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) [2021-10-13 00:18:01,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 89 transitions. [2021-10-13 00:18:01,665 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 89 transitions. Word has length 87 [2021-10-13 00:18:01,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:18:01,665 INFO L470 AbstractCegarLoop]: Abstraction has 89 states and 89 transitions. [2021-10-13 00:18:01,665 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 83 states, 83 states have (on average 1.0481927710843373) internal successors, (87), 83 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) [2021-10-13 00:18:01,665 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 89 transitions. [2021-10-13 00:18:01,666 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 89 [2021-10-13 00:18:01,666 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:18:01,666 INFO L512 BasicCegarLoop]: trace histogram [81, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:18:01,708 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-10-13 00:18:01,887 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:18:01,888 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:18:01,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:18:01,888 INFO L82 PathProgramCache]: Analyzing trace with hash -1333883629, now seen corresponding path program 81 times [2021-10-13 00:18:01,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:18:01,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168908835] [2021-10-13 00:18:01,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:18:01,888 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:18:01,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:18:04,247 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:18:04,247 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:18:04,247 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168908835] [2021-10-13 00:18:04,248 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168908835] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:18:04,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1029532882] [2021-10-13 00:18:04,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 00:18:04,248 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:18:04,248 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:18:04,249 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:18:04,249 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-10-13 00:18:05,605 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 42 check-sat command(s) [2021-10-13 00:18:05,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:18:05,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 450 conjuncts, 83 conjunts are in the unsatisfiable core [2021-10-13 00:18:05,610 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:18:05,866 INFO L134 CoverageAnalysis]: Checked inductivity of 3321 backedges. 0 proven. 3321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:18:05,867 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1029532882] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:18:05,867 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:18:05,867 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [84, 84] total 84 [2021-10-13 00:18:05,867 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [629412385] [2021-10-13 00:18:05,867 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2021-10-13 00:18:05,867 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:18:05,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2021-10-13 00:18:05,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2021-10-13 00:18:05,869 INFO L87 Difference]: Start difference. First operand 89 states and 89 transitions. Second operand has 84 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 84 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:18:05,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:18:05,950 INFO L93 Difference]: Finished difference Result 94 states and 94 transitions. [2021-10-13 00:18:05,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-10-13 00:18:05,951 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 84 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 88 [2021-10-13 00:18:05,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:18:05,951 INFO L225 Difference]: With dead ends: 94 [2021-10-13 00:18:05,951 INFO L226 Difference]: Without dead ends: 90 [2021-10-13 00:18:05,952 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 172 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2177.1ms TimeCoverageRelationStatistics Valid=3486, Invalid=3486, Unknown=0, NotChecked=0, Total=6972 [2021-10-13 00:18:05,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2021-10-13 00:18:05,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 90. [2021-10-13 00:18:05,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0112359550561798) internal successors, (90), 89 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:18:05,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 90 transitions. [2021-10-13 00:18:05,957 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 90 transitions. Word has length 88 [2021-10-13 00:18:05,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:18:05,957 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 90 transitions. [2021-10-13 00:18:05,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 1.0476190476190477) internal successors, (88), 84 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:18:05,958 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 90 transitions. [2021-10-13 00:18:05,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2021-10-13 00:18:05,958 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:18:05,959 INFO L512 BasicCegarLoop]: trace histogram [82, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:18:05,994 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Ended with exit code 0 [2021-10-13 00:18:06,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:18:06,172 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:18:06,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:18:06,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1600945867, now seen corresponding path program 82 times [2021-10-13 00:18:06,172 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:18:06,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494984111] [2021-10-13 00:18:06,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:18:06,173 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:18:06,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:18:08,626 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:18:08,626 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:18:08,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494984111] [2021-10-13 00:18:08,626 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494984111] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:18:08,627 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217548030] [2021-10-13 00:18:08,627 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 00:18:08,627 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:18:08,627 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:18:08,627 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:18:08,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-10-13 00:18:09,939 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 00:18:09,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:18:09,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 455 conjuncts, 84 conjunts are in the unsatisfiable core [2021-10-13 00:18:09,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:18:10,232 INFO L134 CoverageAnalysis]: Checked inductivity of 3403 backedges. 0 proven. 3403 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:18:10,233 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [217548030] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:18:10,233 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:18:10,233 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [85, 85] total 85 [2021-10-13 00:18:10,233 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008067389] [2021-10-13 00:18:10,233 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2021-10-13 00:18:10,233 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:18:10,234 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2021-10-13 00:18:10,234 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2021-10-13 00:18:10,235 INFO L87 Difference]: Start difference. First operand 90 states and 90 transitions. Second operand has 85 states, 85 states have (on average 1.0470588235294118) internal successors, (89), 85 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) [2021-10-13 00:18:10,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:18:10,312 INFO L93 Difference]: Finished difference Result 95 states and 95 transitions. [2021-10-13 00:18:10,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2021-10-13 00:18:10,318 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 1.0470588235294118) internal successors, (89), 85 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 89 [2021-10-13 00:18:10,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:18:10,319 INFO L225 Difference]: With dead ends: 95 [2021-10-13 00:18:10,319 INFO L226 Difference]: Without dead ends: 91 [2021-10-13 00:18:10,320 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 91 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2267.8ms TimeCoverageRelationStatistics Valid=3570, Invalid=3570, Unknown=0, NotChecked=0, Total=7140 [2021-10-13 00:18:10,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-10-13 00:18:10,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 91. [2021-10-13 00:18:10,322 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) [2021-10-13 00:18:10,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 91 transitions. [2021-10-13 00:18:10,323 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 91 transitions. Word has length 89 [2021-10-13 00:18:10,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:18:10,323 INFO L470 AbstractCegarLoop]: Abstraction has 91 states and 91 transitions. [2021-10-13 00:18:10,323 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 1.0470588235294118) internal successors, (89), 85 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) [2021-10-13 00:18:10,323 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 91 transitions. [2021-10-13 00:18:10,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 91 [2021-10-13 00:18:10,324 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:18:10,324 INFO L512 BasicCegarLoop]: trace histogram [83, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:18:10,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-10-13 00:18:10,524 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:18:10,524 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:18:10,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:18:10,525 INFO L82 PathProgramCache]: Analyzing trace with hash -1908620269, now seen corresponding path program 83 times [2021-10-13 00:18:10,525 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:18:10,525 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939947737] [2021-10-13 00:18:10,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:18:10,525 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:18:10,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:18:12,962 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:18:12,962 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:18:12,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939947737] [2021-10-13 00:18:12,962 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1939947737] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:18:12,962 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1852105157] [2021-10-13 00:18:12,962 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 00:18:12,962 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:18:12,963 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:18:12,963 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:18:12,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-10-13 00:18:14,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 43 check-sat command(s) [2021-10-13 00:18:14,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:18:14,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 460 conjuncts, 85 conjunts are in the unsatisfiable core [2021-10-13 00:18:14,309 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:18:14,536 INFO L134 CoverageAnalysis]: Checked inductivity of 3486 backedges. 0 proven. 3486 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:18:14,536 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1852105157] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:18:14,536 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:18:14,536 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [86, 86] total 86 [2021-10-13 00:18:14,536 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302356851] [2021-10-13 00:18:14,536 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 86 states [2021-10-13 00:18:14,537 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:18:14,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 86 interpolants. [2021-10-13 00:18:14,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2021-10-13 00:18:14,538 INFO L87 Difference]: Start difference. First operand 91 states and 91 transitions. Second operand has 86 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 86 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:18:14,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:18:14,640 INFO L93 Difference]: Finished difference Result 96 states and 96 transitions. [2021-10-13 00:18:14,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2021-10-13 00:18:14,640 INFO L78 Accepts]: Start accepts. Automaton has has 86 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 86 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 90 [2021-10-13 00:18:14,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:18:14,641 INFO L225 Difference]: With dead ends: 96 [2021-10-13 00:18:14,642 INFO L226 Difference]: Without dead ends: 92 [2021-10-13 00:18:14,643 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2276.8ms TimeCoverageRelationStatistics Valid=3655, Invalid=3655, Unknown=0, NotChecked=0, Total=7310 [2021-10-13 00:18:14,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2021-10-13 00:18:14,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 92. [2021-10-13 00:18:14,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.010989010989011) internal successors, (92), 91 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:18:14,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 92 transitions. [2021-10-13 00:18:14,646 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 92 transitions. Word has length 90 [2021-10-13 00:18:14,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:18:14,647 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 92 transitions. [2021-10-13 00:18:14,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 86 states, 86 states have (on average 1.0465116279069768) internal successors, (90), 86 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:18:14,647 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 92 transitions. [2021-10-13 00:18:14,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2021-10-13 00:18:14,648 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:18:14,648 INFO L512 BasicCegarLoop]: trace histogram [84, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:18:14,684 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Ended with exit code 0 [2021-10-13 00:18:14,867 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:18:14,867 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:18:14,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:18:14,868 INFO L82 PathProgramCache]: Analyzing trace with hash 963979211, now seen corresponding path program 84 times [2021-10-13 00:18:14,868 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:18:14,868 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318030760] [2021-10-13 00:18:14,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:18:14,868 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:18:14,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:18:17,380 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:18:17,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:18:17,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318030760] [2021-10-13 00:18:17,381 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318030760] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:18:17,381 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [145758639] [2021-10-13 00:18:17,381 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 00:18:17,381 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:18:17,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:18:17,384 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:18:17,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-10-13 00:18:18,770 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 43 check-sat command(s) [2021-10-13 00:18:18,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:18:18,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 465 conjuncts, 86 conjunts are in the unsatisfiable core [2021-10-13 00:18:18,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:18:19,002 INFO L134 CoverageAnalysis]: Checked inductivity of 3570 backedges. 0 proven. 3570 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:18:19,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [145758639] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:18:19,002 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:18:19,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [87, 87] total 87 [2021-10-13 00:18:19,002 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025382334] [2021-10-13 00:18:19,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 87 states [2021-10-13 00:18:19,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:18:19,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 87 interpolants. [2021-10-13 00:18:19,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2021-10-13 00:18:19,005 INFO L87 Difference]: Start difference. First operand 92 states and 92 transitions. Second operand has 87 states, 87 states have (on average 1.0459770114942528) internal successors, (91), 87 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) [2021-10-13 00:18:19,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:18:19,081 INFO L93 Difference]: Finished difference Result 97 states and 97 transitions. [2021-10-13 00:18:19,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-10-13 00:18:19,082 INFO L78 Accepts]: Start accepts. Automaton has has 87 states, 87 states have (on average 1.0459770114942528) internal successors, (91), 87 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 91 [2021-10-13 00:18:19,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:18:19,082 INFO L225 Difference]: With dead ends: 97 [2021-10-13 00:18:19,082 INFO L226 Difference]: Without dead ends: 93 [2021-10-13 00:18:19,083 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 178 GetRequests, 93 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2321.2ms TimeCoverageRelationStatistics Valid=3741, Invalid=3741, Unknown=0, NotChecked=0, Total=7482 [2021-10-13 00:18:19,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2021-10-13 00:18:19,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 93. [2021-10-13 00:18:19,085 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) [2021-10-13 00:18:19,086 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 93 transitions. [2021-10-13 00:18:19,086 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 93 transitions. Word has length 91 [2021-10-13 00:18:19,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:18:19,086 INFO L470 AbstractCegarLoop]: Abstraction has 93 states and 93 transitions. [2021-10-13 00:18:19,086 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 87 states, 87 states have (on average 1.0459770114942528) internal successors, (91), 87 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) [2021-10-13 00:18:19,086 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 93 transitions. [2021-10-13 00:18:19,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 93 [2021-10-13 00:18:19,087 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:18:19,087 INFO L512 BasicCegarLoop]: trace histogram [85, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:18:19,112 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Ended with exit code 0 [2021-10-13 00:18:19,287 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable85 [2021-10-13 00:18:19,287 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:18:19,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:18:19,288 INFO L82 PathProgramCache]: Analyzing trace with hash -179750125, now seen corresponding path program 85 times [2021-10-13 00:18:19,288 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:18:19,288 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847948206] [2021-10-13 00:18:19,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:18:19,288 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:18:19,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:18:21,833 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:18:21,833 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:18:21,833 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847948206] [2021-10-13 00:18:21,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847948206] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:18:21,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [521580299] [2021-10-13 00:18:21,834 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 00:18:21,834 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:18:21,834 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:18:21,835 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:18:21,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-10-13 00:18:23,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:18:23,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 470 conjuncts, 87 conjunts are in the unsatisfiable core [2021-10-13 00:18:23,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:18:23,498 INFO L134 CoverageAnalysis]: Checked inductivity of 3655 backedges. 0 proven. 3655 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:18:23,498 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [521580299] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:18:23,498 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:18:23,498 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [88, 88] total 88 [2021-10-13 00:18:23,498 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [888141296] [2021-10-13 00:18:23,499 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2021-10-13 00:18:23,499 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:18:23,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2021-10-13 00:18:23,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2021-10-13 00:18:23,501 INFO L87 Difference]: Start difference. First operand 93 states and 93 transitions. Second operand has 88 states, 88 states have (on average 1.0454545454545454) internal successors, (92), 88 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:18:23,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:18:23,581 INFO L93 Difference]: Finished difference Result 98 states and 98 transitions. [2021-10-13 00:18:23,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-10-13 00:18:23,581 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 1.0454545454545454) internal successors, (92), 88 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 92 [2021-10-13 00:18:23,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:18:23,582 INFO L225 Difference]: With dead ends: 98 [2021-10-13 00:18:23,582 INFO L226 Difference]: Without dead ends: 94 [2021-10-13 00:18:23,583 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 180 GetRequests, 94 SyntacticMatches, 0 SemanticMatches, 86 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2354.7ms TimeCoverageRelationStatistics Valid=3828, Invalid=3828, Unknown=0, NotChecked=0, Total=7656 [2021-10-13 00:18:23,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-10-13 00:18:23,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 94. [2021-10-13 00:18:23,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.010752688172043) internal successors, (94), 93 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:18:23,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 94 transitions. [2021-10-13 00:18:23,585 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 94 transitions. Word has length 92 [2021-10-13 00:18:23,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:18:23,585 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 94 transitions. [2021-10-13 00:18:23,586 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 1.0454545454545454) internal successors, (92), 88 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:18:23,586 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 94 transitions. [2021-10-13 00:18:23,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-10-13 00:18:23,586 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:18:23,586 INFO L512 BasicCegarLoop]: trace histogram [86, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:18:23,612 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-10-13 00:18:23,791 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2021-10-13 00:18:23,792 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:18:23,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:18:23,792 INFO L82 PathProgramCache]: Analyzing trace with hash -1275621173, now seen corresponding path program 86 times [2021-10-13 00:18:23,792 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:18:23,792 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686964412] [2021-10-13 00:18:23,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:18:23,792 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:18:23,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:18:26,375 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:18:26,375 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:18:26,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686964412] [2021-10-13 00:18:26,375 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686964412] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:18:26,375 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492351998] [2021-10-13 00:18:26,375 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:18:26,376 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:18:26,376 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:18:26,376 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:18:26,378 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-10-13 00:18:27,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:18:27,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:18:27,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 475 conjuncts, 88 conjunts are in the unsatisfiable core [2021-10-13 00:18:27,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:18:28,064 INFO L134 CoverageAnalysis]: Checked inductivity of 3741 backedges. 0 proven. 3741 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:18:28,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492351998] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:18:28,064 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:18:28,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [89, 89] total 89 [2021-10-13 00:18:28,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1162615835] [2021-10-13 00:18:28,065 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2021-10-13 00:18:28,065 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:18:28,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2021-10-13 00:18:28,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2021-10-13 00:18:28,068 INFO L87 Difference]: Start difference. First operand 94 states and 94 transitions. Second operand has 89 states, 89 states have (on average 1.0449438202247192) internal successors, (93), 89 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) [2021-10-13 00:18:28,194 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:18:28,194 INFO L93 Difference]: Finished difference Result 99 states and 99 transitions. [2021-10-13 00:18:28,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2021-10-13 00:18:28,195 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 89 states have (on average 1.0449438202247192) internal successors, (93), 89 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 93 [2021-10-13 00:18:28,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:18:28,195 INFO L225 Difference]: With dead ends: 99 [2021-10-13 00:18:28,196 INFO L226 Difference]: Without dead ends: 95 [2021-10-13 00:18:28,196 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 182 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 87 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2400.6ms TimeCoverageRelationStatistics Valid=3916, Invalid=3916, Unknown=0, NotChecked=0, Total=7832 [2021-10-13 00:18:28,197 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2021-10-13 00:18:28,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 95. [2021-10-13 00:18:28,200 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) [2021-10-13 00:18:28,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 95 transitions. [2021-10-13 00:18:28,200 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 95 transitions. Word has length 93 [2021-10-13 00:18:28,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:18:28,200 INFO L470 AbstractCegarLoop]: Abstraction has 95 states and 95 transitions. [2021-10-13 00:18:28,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 89 states have (on average 1.0449438202247192) internal successors, (93), 89 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) [2021-10-13 00:18:28,201 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 95 transitions. [2021-10-13 00:18:28,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 95 [2021-10-13 00:18:28,202 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:18:28,202 INFO L512 BasicCegarLoop]: trace histogram [87, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:18:28,245 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Ended with exit code 0 [2021-10-13 00:18:28,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:18:28,417 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:18:28,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:18:28,418 INFO L82 PathProgramCache]: Analyzing trace with hash -887885293, now seen corresponding path program 87 times [2021-10-13 00:18:28,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:18:28,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781744419] [2021-10-13 00:18:28,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:18:28,418 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:18:28,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:18:31,045 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:18:31,045 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:18:31,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781744419] [2021-10-13 00:18:31,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1781744419] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:18:31,045 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [903229179] [2021-10-13 00:18:31,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 00:18:31,045 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:18:31,045 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:18:31,046 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:18:31,047 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-10-13 00:18:32,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 45 check-sat command(s) [2021-10-13 00:18:32,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:18:32,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 480 conjuncts, 89 conjunts are in the unsatisfiable core [2021-10-13 00:18:32,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:18:32,892 INFO L134 CoverageAnalysis]: Checked inductivity of 3828 backedges. 0 proven. 3828 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:18:32,892 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [903229179] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:18:32,892 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:18:32,892 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [90, 90] total 90 [2021-10-13 00:18:32,893 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715015235] [2021-10-13 00:18:32,893 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2021-10-13 00:18:32,893 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:18:32,895 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2021-10-13 00:18:32,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2021-10-13 00:18:32,896 INFO L87 Difference]: Start difference. First operand 95 states and 95 transitions. Second operand has 90 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 90 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:18:33,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:18:33,010 INFO L93 Difference]: Finished difference Result 100 states and 100 transitions. [2021-10-13 00:18:33,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 90 states. [2021-10-13 00:18:33,011 INFO L78 Accepts]: Start accepts. Automaton has has 90 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 90 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 94 [2021-10-13 00:18:33,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:18:33,012 INFO L225 Difference]: With dead ends: 100 [2021-10-13 00:18:33,012 INFO L226 Difference]: Without dead ends: 96 [2021-10-13 00:18:33,013 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 96 SyntacticMatches, 0 SemanticMatches, 88 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2461.8ms TimeCoverageRelationStatistics Valid=4005, Invalid=4005, Unknown=0, NotChecked=0, Total=8010 [2021-10-13 00:18:33,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-10-13 00:18:33,016 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 96. [2021-10-13 00:18:33,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0105263157894737) internal successors, (96), 95 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:18:33,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 96 transitions. [2021-10-13 00:18:33,017 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 96 transitions. Word has length 94 [2021-10-13 00:18:33,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:18:33,018 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 96 transitions. [2021-10-13 00:18:33,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 90 states, 90 states have (on average 1.0444444444444445) internal successors, (94), 90 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:18:33,018 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 96 transitions. [2021-10-13 00:18:33,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2021-10-13 00:18:33,019 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:18:33,019 INFO L512 BasicCegarLoop]: trace histogram [88, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:18:33,048 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Ended with exit code 0 [2021-10-13 00:18:33,223 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:18:33,224 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:18:33,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:18:33,224 INFO L82 PathProgramCache]: Analyzing trace with hash -1752974901, now seen corresponding path program 88 times [2021-10-13 00:18:33,224 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:18:33,224 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450248702] [2021-10-13 00:18:33,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:18:33,224 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:18:33,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:18:35,964 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:18:35,964 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:18:35,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450248702] [2021-10-13 00:18:35,964 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450248702] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:18:35,964 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022676829] [2021-10-13 00:18:35,964 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 00:18:35,964 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:18:35,965 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:18:35,965 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:18:35,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-10-13 00:18:37,435 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 00:18:37,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:18:37,438 INFO L263 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 90 conjunts are in the unsatisfiable core [2021-10-13 00:18:37,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:18:37,701 INFO L134 CoverageAnalysis]: Checked inductivity of 3916 backedges. 0 proven. 3916 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:18:37,702 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022676829] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:18:37,702 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:18:37,702 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [91, 91] total 91 [2021-10-13 00:18:37,702 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2067732252] [2021-10-13 00:18:37,702 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2021-10-13 00:18:37,702 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:18:37,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2021-10-13 00:18:37,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2021-10-13 00:18:37,704 INFO L87 Difference]: Start difference. First operand 96 states and 96 transitions. Second operand has 91 states, 91 states have (on average 1.043956043956044) internal successors, (95), 91 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) [2021-10-13 00:18:37,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:18:37,790 INFO L93 Difference]: Finished difference Result 101 states and 101 transitions. [2021-10-13 00:18:37,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-10-13 00:18:37,790 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 1.043956043956044) internal successors, (95), 91 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 95 [2021-10-13 00:18:37,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:18:37,791 INFO L225 Difference]: With dead ends: 101 [2021-10-13 00:18:37,791 INFO L226 Difference]: Without dead ends: 97 [2021-10-13 00:18:37,791 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 186 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2569.3ms TimeCoverageRelationStatistics Valid=4095, Invalid=4095, Unknown=0, NotChecked=0, Total=8190 [2021-10-13 00:18:37,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2021-10-13 00:18:37,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 97. [2021-10-13 00:18:37,793 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) [2021-10-13 00:18:37,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 97 transitions. [2021-10-13 00:18:37,794 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 97 transitions. Word has length 95 [2021-10-13 00:18:37,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:18:37,794 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 97 transitions. [2021-10-13 00:18:37,794 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 1.043956043956044) internal successors, (95), 91 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) [2021-10-13 00:18:37,794 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 97 transitions. [2021-10-13 00:18:37,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2021-10-13 00:18:37,794 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:18:37,795 INFO L512 BasicCegarLoop]: trace histogram [89, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:18:37,820 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-10-13 00:18:37,995 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-10-13 00:18:37,995 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:18:37,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:18:37,995 INFO L82 PathProgramCache]: Analyzing trace with hash 1494018323, now seen corresponding path program 89 times [2021-10-13 00:18:37,995 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:18:37,995 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028596944] [2021-10-13 00:18:37,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:18:37,996 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:18:38,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:18:40,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:18:40,775 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:18:40,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028596944] [2021-10-13 00:18:40,775 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028596944] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:18:40,775 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1394114587] [2021-10-13 00:18:40,775 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 00:18:40,775 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:18:40,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:18:40,776 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:18:40,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-10-13 00:18:42,313 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 46 check-sat command(s) [2021-10-13 00:18:42,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:18:42,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 490 conjuncts, 91 conjunts are in the unsatisfiable core [2021-10-13 00:18:42,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:18:42,570 INFO L134 CoverageAnalysis]: Checked inductivity of 4005 backedges. 0 proven. 4005 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:18:42,570 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1394114587] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:18:42,570 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:18:42,570 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [92, 92] total 92 [2021-10-13 00:18:42,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854442818] [2021-10-13 00:18:42,571 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 92 states [2021-10-13 00:18:42,571 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:18:42,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 92 interpolants. [2021-10-13 00:18:42,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2021-10-13 00:18:42,573 INFO L87 Difference]: Start difference. First operand 97 states and 97 transitions. Second operand has 92 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 92 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:18:42,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:18:42,674 INFO L93 Difference]: Finished difference Result 102 states and 102 transitions. [2021-10-13 00:18:42,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2021-10-13 00:18:42,674 INFO L78 Accepts]: Start accepts. Automaton has has 92 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 92 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2021-10-13 00:18:42,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:18:42,675 INFO L225 Difference]: With dead ends: 102 [2021-10-13 00:18:42,675 INFO L226 Difference]: Without dead ends: 98 [2021-10-13 00:18:42,676 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 98 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2606.7ms TimeCoverageRelationStatistics Valid=4186, Invalid=4186, Unknown=0, NotChecked=0, Total=8372 [2021-10-13 00:18:42,677 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-10-13 00:18:42,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 98. [2021-10-13 00:18:42,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 1.0103092783505154) internal successors, (98), 97 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:18:42,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 98 transitions. [2021-10-13 00:18:42,680 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 98 transitions. Word has length 96 [2021-10-13 00:18:42,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:18:42,681 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 98 transitions. [2021-10-13 00:18:42,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 92 states, 92 states have (on average 1.0434782608695652) internal successors, (96), 92 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:18:42,681 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 98 transitions. [2021-10-13 00:18:42,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 98 [2021-10-13 00:18:42,682 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:18:42,682 INFO L512 BasicCegarLoop]: trace histogram [90, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:18:42,727 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-10-13 00:18:42,895 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:18:42,896 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:18:42,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:18:42,896 INFO L82 PathProgramCache]: Analyzing trace with hash -928406837, now seen corresponding path program 90 times [2021-10-13 00:18:42,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:18:42,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [456817356] [2021-10-13 00:18:42,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:18:42,896 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:18:42,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:18:45,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:18:45,728 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:18:45,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [456817356] [2021-10-13 00:18:45,728 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [456817356] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:18:45,728 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1049421141] [2021-10-13 00:18:45,729 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 00:18:45,729 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:18:45,729 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:18:45,731 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:18:45,732 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-10-13 00:18:47,316 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 46 check-sat command(s) [2021-10-13 00:18:47,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:18:47,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 495 conjuncts, 92 conjunts are in the unsatisfiable core [2021-10-13 00:18:47,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:18:47,557 INFO L134 CoverageAnalysis]: Checked inductivity of 4095 backedges. 0 proven. 4095 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:18:47,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1049421141] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:18:47,558 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:18:47,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [93, 93] total 93 [2021-10-13 00:18:47,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618803712] [2021-10-13 00:18:47,558 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 93 states [2021-10-13 00:18:47,558 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:18:47,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 93 interpolants. [2021-10-13 00:18:47,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2021-10-13 00:18:47,561 INFO L87 Difference]: Start difference. First operand 98 states and 98 transitions. Second operand has 93 states, 93 states have (on average 1.043010752688172) internal successors, (97), 93 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) [2021-10-13 00:18:47,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:18:47,678 INFO L93 Difference]: Finished difference Result 103 states and 103 transitions. [2021-10-13 00:18:47,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2021-10-13 00:18:47,678 INFO L78 Accepts]: Start accepts. Automaton has has 93 states, 93 states have (on average 1.043010752688172) internal successors, (97), 93 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 97 [2021-10-13 00:18:47,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:18:47,679 INFO L225 Difference]: With dead ends: 103 [2021-10-13 00:18:47,679 INFO L226 Difference]: Without dead ends: 99 [2021-10-13 00:18:47,680 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 190 GetRequests, 99 SyntacticMatches, 0 SemanticMatches, 91 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2648.0ms TimeCoverageRelationStatistics Valid=4278, Invalid=4278, Unknown=0, NotChecked=0, Total=8556 [2021-10-13 00:18:47,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2021-10-13 00:18:47,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 99. [2021-10-13 00:18:47,683 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) [2021-10-13 00:18:47,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 99 transitions. [2021-10-13 00:18:47,684 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 99 transitions. Word has length 97 [2021-10-13 00:18:47,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:18:47,684 INFO L470 AbstractCegarLoop]: Abstraction has 99 states and 99 transitions. [2021-10-13 00:18:47,684 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 93 states, 93 states have (on average 1.043010752688172) internal successors, (97), 93 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) [2021-10-13 00:18:47,684 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 99 transitions. [2021-10-13 00:18:47,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 99 [2021-10-13 00:18:47,685 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:18:47,685 INFO L512 BasicCegarLoop]: trace histogram [91, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:18:47,726 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2021-10-13 00:18:47,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:18:47,912 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:18:47,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:18:47,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1285824531, now seen corresponding path program 91 times [2021-10-13 00:18:47,912 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:18:47,912 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1078449747] [2021-10-13 00:18:47,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:18:47,912 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:18:47,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:18:50,775 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:18:50,776 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:18:50,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1078449747] [2021-10-13 00:18:50,776 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1078449747] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:18:50,776 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711496210] [2021-10-13 00:18:50,776 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 00:18:50,776 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:18:50,776 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:18:50,777 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:18:50,777 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-10-13 00:18:52,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:18:52,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 500 conjuncts, 93 conjunts are in the unsatisfiable core [2021-10-13 00:18:52,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:18:52,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4186 backedges. 0 proven. 4186 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:18:52,610 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1711496210] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:18:52,610 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:18:52,610 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [94, 94] total 94 [2021-10-13 00:18:52,610 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1366153168] [2021-10-13 00:18:52,611 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2021-10-13 00:18:52,611 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:18:52,611 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2021-10-13 00:18:52,612 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2021-10-13 00:18:52,612 INFO L87 Difference]: Start difference. First operand 99 states and 99 transitions. Second operand has 94 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 94 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:18:52,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:18:52,751 INFO L93 Difference]: Finished difference Result 104 states and 104 transitions. [2021-10-13 00:18:52,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-10-13 00:18:52,751 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 94 states have internal predecessors, (98), 0 states have call successors, (0), 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 [2021-10-13 00:18:52,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:18:52,752 INFO L225 Difference]: With dead ends: 104 [2021-10-13 00:18:52,752 INFO L226 Difference]: Without dead ends: 100 [2021-10-13 00:18:52,752 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 192 GetRequests, 100 SyntacticMatches, 0 SemanticMatches, 92 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2677.7ms TimeCoverageRelationStatistics Valid=4371, Invalid=4371, Unknown=0, NotChecked=0, Total=8742 [2021-10-13 00:18:52,753 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-10-13 00:18:52,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2021-10-13 00:18:52,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.0101010101010102) internal successors, (100), 99 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:18:52,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 100 transitions. [2021-10-13 00:18:52,755 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 100 transitions. Word has length 98 [2021-10-13 00:18:52,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:18:52,755 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 100 transitions. [2021-10-13 00:18:52,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 1.0425531914893618) internal successors, (98), 94 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:18:52,755 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 100 transitions. [2021-10-13 00:18:52,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-10-13 00:18:52,755 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:18:52,756 INFO L512 BasicCegarLoop]: trace histogram [92, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:18:52,781 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Ended with exit code 0 [2021-10-13 00:18:52,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:18:52,956 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:18:52,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:18:52,956 INFO L82 PathProgramCache]: Analyzing trace with hash 1207520203, now seen corresponding path program 92 times [2021-10-13 00:18:52,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:18:52,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694776929] [2021-10-13 00:18:52,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:18:52,957 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:18:53,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:18:55,900 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:18:55,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:18:55,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694776929] [2021-10-13 00:18:55,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694776929] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:18:55,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [790505122] [2021-10-13 00:18:55,901 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:18:55,901 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:18:55,901 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:18:55,902 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:18:55,902 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-10-13 00:18:57,507 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:18:57,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:18:57,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 505 conjuncts, 94 conjunts are in the unsatisfiable core [2021-10-13 00:18:57,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:18:57,753 INFO L134 CoverageAnalysis]: Checked inductivity of 4278 backedges. 0 proven. 4278 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:18:57,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [790505122] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:18:57,753 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:18:57,753 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [95, 95] total 95 [2021-10-13 00:18:57,753 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1028844226] [2021-10-13 00:18:57,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 95 states [2021-10-13 00:18:57,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:18:57,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 95 interpolants. [2021-10-13 00:18:57,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2021-10-13 00:18:57,755 INFO L87 Difference]: Start difference. First operand 100 states and 100 transitions. Second operand has 95 states, 95 states have (on average 1.0421052631578946) internal successors, (99), 95 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) [2021-10-13 00:18:57,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:18:57,834 INFO L93 Difference]: Finished difference Result 105 states and 105 transitions. [2021-10-13 00:18:57,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2021-10-13 00:18:57,848 INFO L78 Accepts]: Start accepts. Automaton has has 95 states, 95 states have (on average 1.0421052631578946) internal successors, (99), 95 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 99 [2021-10-13 00:18:57,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:18:57,849 INFO L225 Difference]: With dead ends: 105 [2021-10-13 00:18:57,849 INFO L226 Difference]: Without dead ends: 101 [2021-10-13 00:18:57,852 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 101 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2760.5ms TimeCoverageRelationStatistics Valid=4465, Invalid=4465, Unknown=0, NotChecked=0, Total=8930 [2021-10-13 00:18:57,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2021-10-13 00:18:57,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 101. [2021-10-13 00:18:57,855 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) [2021-10-13 00:18:57,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 101 transitions. [2021-10-13 00:18:57,855 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 101 transitions. Word has length 99 [2021-10-13 00:18:57,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:18:57,856 INFO L470 AbstractCegarLoop]: Abstraction has 101 states and 101 transitions. [2021-10-13 00:18:57,856 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 95 states, 95 states have (on average 1.0421052631578946) internal successors, (99), 95 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) [2021-10-13 00:18:57,856 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 101 transitions. [2021-10-13 00:18:57,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 101 [2021-10-13 00:18:57,857 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:18:57,857 INFO L512 BasicCegarLoop]: trace histogram [93, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:18:57,886 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2021-10-13 00:18:58,067 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:18:58,068 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:18:58,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:18:58,068 INFO L82 PathProgramCache]: Analyzing trace with hash -1219913965, now seen corresponding path program 93 times [2021-10-13 00:18:58,068 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:18:58,068 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090848019] [2021-10-13 00:18:58,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:18:58,068 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:18:58,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:01,100 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:19:01,100 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:19:01,100 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090848019] [2021-10-13 00:19:01,100 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090848019] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:19:01,101 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365549696] [2021-10-13 00:19:01,101 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 00:19:01,101 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:19:01,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:19:01,101 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:19:01,106 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-10-13 00:19:02,790 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 48 check-sat command(s) [2021-10-13 00:19:02,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:19:02,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 95 conjunts are in the unsatisfiable core [2021-10-13 00:19:02,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:19:03,081 INFO L134 CoverageAnalysis]: Checked inductivity of 4371 backedges. 0 proven. 4371 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:19:03,081 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365549696] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:19:03,081 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:19:03,082 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [96, 96] total 96 [2021-10-13 00:19:03,082 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636413802] [2021-10-13 00:19:03,082 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2021-10-13 00:19:03,082 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:19:03,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2021-10-13 00:19:03,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2021-10-13 00:19:03,084 INFO L87 Difference]: Start difference. First operand 101 states and 101 transitions. Second operand has 96 states, 96 states have (on average 1.0416666666666667) internal successors, (100), 96 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:19:03,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:19:03,179 INFO L93 Difference]: Finished difference Result 106 states and 106 transitions. [2021-10-13 00:19:03,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-10-13 00:19:03,180 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 1.0416666666666667) internal successors, (100), 96 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 100 [2021-10-13 00:19:03,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:19:03,180 INFO L225 Difference]: With dead ends: 106 [2021-10-13 00:19:03,180 INFO L226 Difference]: Without dead ends: 102 [2021-10-13 00:19:03,181 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 196 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2819.0ms TimeCoverageRelationStatistics Valid=4560, Invalid=4560, Unknown=0, NotChecked=0, Total=9120 [2021-10-13 00:19:03,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-10-13 00:19:03,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 102. [2021-10-13 00:19:03,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.00990099009901) internal successors, (102), 101 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:19:03,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 102 transitions. [2021-10-13 00:19:03,185 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 102 transitions. Word has length 100 [2021-10-13 00:19:03,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:19:03,185 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 102 transitions. [2021-10-13 00:19:03,185 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 1.0416666666666667) internal successors, (100), 96 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:19:03,185 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 102 transitions. [2021-10-13 00:19:03,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2021-10-13 00:19:03,185 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:19:03,185 INFO L512 BasicCegarLoop]: trace histogram [94, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:19:03,212 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Ended with exit code 0 [2021-10-13 00:19:03,386 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:19:03,386 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:19:03,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:19:03,386 INFO L82 PathProgramCache]: Analyzing trace with hash 839038155, now seen corresponding path program 94 times [2021-10-13 00:19:03,386 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:19:03,387 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043185277] [2021-10-13 00:19:03,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:19:03,387 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:19:03,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:06,490 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:19:06,491 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:19:06,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043185277] [2021-10-13 00:19:06,491 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043185277] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:19:06,491 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [527083277] [2021-10-13 00:19:06,491 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 00:19:06,491 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:19:06,491 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:19:06,492 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:19:06,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-10-13 00:19:08,204 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 00:19:08,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:19:08,207 INFO L263 TraceCheckSpWp]: Trace formula consists of 515 conjuncts, 96 conjunts are in the unsatisfiable core [2021-10-13 00:19:08,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:19:08,488 INFO L134 CoverageAnalysis]: Checked inductivity of 4465 backedges. 0 proven. 4465 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:19:08,488 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [527083277] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:19:08,488 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:19:08,488 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [97, 97] total 97 [2021-10-13 00:19:08,489 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589962127] [2021-10-13 00:19:08,489 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2021-10-13 00:19:08,489 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:19:08,490 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2021-10-13 00:19:08,490 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-10-13 00:19:08,490 INFO L87 Difference]: Start difference. First operand 102 states and 102 transitions. Second operand has 97 states, 97 states have (on average 1.041237113402062) internal successors, (101), 97 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) [2021-10-13 00:19:08,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:19:08,637 INFO L93 Difference]: Finished difference Result 107 states and 107 transitions. [2021-10-13 00:19:08,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2021-10-13 00:19:08,638 INFO L78 Accepts]: Start accepts. Automaton has has 97 states, 97 states have (on average 1.041237113402062) internal successors, (101), 97 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 101 [2021-10-13 00:19:08,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:19:08,639 INFO L225 Difference]: With dead ends: 107 [2021-10-13 00:19:08,639 INFO L226 Difference]: Without dead ends: 103 [2021-10-13 00:19:08,640 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 2901.7ms TimeCoverageRelationStatistics Valid=4656, Invalid=4656, Unknown=0, NotChecked=0, Total=9312 [2021-10-13 00:19:08,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2021-10-13 00:19:08,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 103. [2021-10-13 00:19:08,643 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) [2021-10-13 00:19:08,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 103 transitions. [2021-10-13 00:19:08,643 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 103 transitions. Word has length 101 [2021-10-13 00:19:08,644 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:19:08,644 INFO L470 AbstractCegarLoop]: Abstraction has 103 states and 103 transitions. [2021-10-13 00:19:08,644 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 1.041237113402062) internal successors, (101), 97 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) [2021-10-13 00:19:08,644 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 103 transitions. [2021-10-13 00:19:08,645 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 103 [2021-10-13 00:19:08,645 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:19:08,645 INFO L512 BasicCegarLoop]: trace histogram [95, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:19:08,677 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Ended with exit code 0 [2021-10-13 00:19:08,846 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2021-10-13 00:19:08,846 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:19:08,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:19:08,846 INFO L82 PathProgramCache]: Analyzing trace with hash 242044435, now seen corresponding path program 95 times [2021-10-13 00:19:08,846 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:19:08,846 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502564776] [2021-10-13 00:19:08,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:19:08,847 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:19:08,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:12,390 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:19:12,390 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:19:12,390 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502564776] [2021-10-13 00:19:12,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502564776] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:19:12,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [111785287] [2021-10-13 00:19:12,391 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-13 00:19:12,391 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:19:12,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:19:12,395 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:19:12,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-10-13 00:19:14,314 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 49 check-sat command(s) [2021-10-13 00:19:14,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:19:14,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 520 conjuncts, 97 conjunts are in the unsatisfiable core [2021-10-13 00:19:14,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:19:14,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4560 backedges. 0 proven. 4560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:19:14,621 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [111785287] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:19:14,621 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:19:14,621 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [98, 98] total 98 [2021-10-13 00:19:14,621 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829246010] [2021-10-13 00:19:14,622 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2021-10-13 00:19:14,622 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:19:14,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2021-10-13 00:19:14,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2021-10-13 00:19:14,623 INFO L87 Difference]: Start difference. First operand 103 states and 103 transitions. Second operand has 98 states, 98 states have (on average 1.0408163265306123) internal successors, (102), 98 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:19:14,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:19:14,734 INFO L93 Difference]: Finished difference Result 108 states and 108 transitions. [2021-10-13 00:19:14,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2021-10-13 00:19:14,734 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 1.0408163265306123) internal successors, (102), 98 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 102 [2021-10-13 00:19:14,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:19:14,736 INFO L225 Difference]: With dead ends: 108 [2021-10-13 00:19:14,736 INFO L226 Difference]: Without dead ends: 104 [2021-10-13 00:19:14,737 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 200 GetRequests, 104 SyntacticMatches, 0 SemanticMatches, 96 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3319.5ms TimeCoverageRelationStatistics Valid=4753, Invalid=4753, Unknown=0, NotChecked=0, Total=9506 [2021-10-13 00:19:14,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2021-10-13 00:19:14,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 104. [2021-10-13 00:19:14,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.0097087378640777) internal successors, (104), 103 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:19:14,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 104 transitions. [2021-10-13 00:19:14,740 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 104 transitions. Word has length 102 [2021-10-13 00:19:14,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:19:14,740 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 104 transitions. [2021-10-13 00:19:14,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 1.0408163265306123) internal successors, (102), 98 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:19:14,740 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 104 transitions. [2021-10-13 00:19:14,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2021-10-13 00:19:14,741 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:19:14,741 INFO L512 BasicCegarLoop]: trace histogram [96, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:19:14,777 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2021-10-13 00:19:14,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:19:14,954 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:19:14,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:19:14,954 INFO L82 PathProgramCache]: Analyzing trace with hash -1084891701, now seen corresponding path program 96 times [2021-10-13 00:19:14,954 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:19:14,954 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254859009] [2021-10-13 00:19:14,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:19:14,955 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:19:15,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:18,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:19:18,740 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:19:18,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254859009] [2021-10-13 00:19:18,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254859009] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:19:18,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [203165691] [2021-10-13 00:19:18,740 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-13 00:19:18,740 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:19:18,740 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:19:18,741 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:19:18,742 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-10-13 00:19:20,799 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 49 check-sat command(s) [2021-10-13 00:19:20,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:19:20,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 525 conjuncts, 98 conjunts are in the unsatisfiable core [2021-10-13 00:19:20,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:19:21,117 INFO L134 CoverageAnalysis]: Checked inductivity of 4656 backedges. 0 proven. 4656 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:19:21,117 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [203165691] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:19:21,117 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:19:21,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [99, 99] total 99 [2021-10-13 00:19:21,117 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [748671253] [2021-10-13 00:19:21,118 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 99 states [2021-10-13 00:19:21,118 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:19:21,119 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 99 interpolants. [2021-10-13 00:19:21,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2021-10-13 00:19:21,119 INFO L87 Difference]: Start difference. First operand 104 states and 104 transitions. Second operand has 99 states, 99 states have (on average 1.0404040404040404) internal successors, (103), 99 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) [2021-10-13 00:19:21,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:19:21,288 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2021-10-13 00:19:21,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 99 states. [2021-10-13 00:19:21,289 INFO L78 Accepts]: Start accepts. Automaton has has 99 states, 99 states have (on average 1.0404040404040404) internal successors, (103), 99 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 103 [2021-10-13 00:19:21,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:19:21,290 INFO L225 Difference]: With dead ends: 109 [2021-10-13 00:19:21,290 INFO L226 Difference]: Without dead ends: 105 [2021-10-13 00:19:21,291 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 202 GetRequests, 105 SyntacticMatches, 0 SemanticMatches, 97 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3553.1ms TimeCoverageRelationStatistics Valid=4851, Invalid=4851, Unknown=0, NotChecked=0, Total=9702 [2021-10-13 00:19:21,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2021-10-13 00:19:21,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 105. [2021-10-13 00:19:21,295 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) [2021-10-13 00:19:21,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 105 transitions. [2021-10-13 00:19:21,296 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 105 transitions. Word has length 103 [2021-10-13 00:19:21,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:19:21,296 INFO L470 AbstractCegarLoop]: Abstraction has 105 states and 105 transitions. [2021-10-13 00:19:21,296 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 99 states, 99 states have (on average 1.0404040404040404) internal successors, (103), 99 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) [2021-10-13 00:19:21,297 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 105 transitions. [2021-10-13 00:19:21,297 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 105 [2021-10-13 00:19:21,297 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:19:21,298 INFO L512 BasicCegarLoop]: trace histogram [97, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:19:21,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2021-10-13 00:19:21,511 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:19:21,512 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:19:21,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:19:21,512 INFO L82 PathProgramCache]: Analyzing trace with hash 729761043, now seen corresponding path program 97 times [2021-10-13 00:19:21,512 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:19:21,512 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [693692481] [2021-10-13 00:19:21,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:19:21,512 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:19:21,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:25,349 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:19:25,349 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:19:25,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [693692481] [2021-10-13 00:19:25,349 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [693692481] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:19:25,349 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1811040563] [2021-10-13 00:19:25,349 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-13 00:19:25,350 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:19:25,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:19:25,366 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:19:25,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-10-13 00:19:27,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:27,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 99 conjunts are in the unsatisfiable core [2021-10-13 00:19:27,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:19:27,759 INFO L134 CoverageAnalysis]: Checked inductivity of 4753 backedges. 0 proven. 4753 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:19:27,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1811040563] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:19:27,759 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:19:27,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [100, 100] total 100 [2021-10-13 00:19:27,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74676218] [2021-10-13 00:19:27,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2021-10-13 00:19:27,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:19:27,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2021-10-13 00:19:27,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2021-10-13 00:19:27,762 INFO L87 Difference]: Start difference. First operand 105 states and 105 transitions. Second operand has 100 states, 100 states have (on average 1.04) internal successors, (104), 100 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:19:27,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:19:27,872 INFO L93 Difference]: Finished difference Result 110 states and 110 transitions. [2021-10-13 00:19:27,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2021-10-13 00:19:27,873 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 1.04) internal successors, (104), 100 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 104 [2021-10-13 00:19:27,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:19:27,874 INFO L225 Difference]: With dead ends: 110 [2021-10-13 00:19:27,874 INFO L226 Difference]: Without dead ends: 106 [2021-10-13 00:19:27,874 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 204 GetRequests, 106 SyntacticMatches, 0 SemanticMatches, 98 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3604.9ms TimeCoverageRelationStatistics Valid=4950, Invalid=4950, Unknown=0, NotChecked=0, Total=9900 [2021-10-13 00:19:27,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-10-13 00:19:27,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2021-10-13 00:19:27,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.0095238095238095) internal successors, (106), 105 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:19:27,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 106 transitions. [2021-10-13 00:19:27,878 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 106 transitions. Word has length 104 [2021-10-13 00:19:27,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:19:27,879 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 106 transitions. [2021-10-13 00:19:27,879 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 1.04) internal successors, (104), 100 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:19:27,879 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 106 transitions. [2021-10-13 00:19:27,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-10-13 00:19:27,880 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:19:27,880 INFO L512 BasicCegarLoop]: trace histogram [98, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:19:27,932 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Forceful destruction successful, exit code 0 [2021-10-13 00:19:28,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-10-13 00:19:28,108 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:19:28,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:19:28,108 INFO L82 PathProgramCache]: Analyzing trace with hash 1149421259, now seen corresponding path program 98 times [2021-10-13 00:19:28,108 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:19:28,108 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878733263] [2021-10-13 00:19:28,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:19:28,108 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:19:28,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:32,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:19:32,240 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:19:32,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878733263] [2021-10-13 00:19:32,240 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878733263] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:19:32,240 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [969497725] [2021-10-13 00:19:32,240 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-13 00:19:32,240 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:19:32,240 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:19:32,241 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:19:32,242 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-10-13 00:19:34,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-13 00:19:34,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:19:34,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 535 conjuncts, 100 conjunts are in the unsatisfiable core [2021-10-13 00:19:34,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:19:34,734 INFO L134 CoverageAnalysis]: Checked inductivity of 4851 backedges. 0 proven. 4851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:19:34,734 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [969497725] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:19:34,734 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:19:34,734 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [101, 101] total 101 [2021-10-13 00:19:34,735 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102771843] [2021-10-13 00:19:34,735 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2021-10-13 00:19:34,735 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:19:34,737 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2021-10-13 00:19:34,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2021-10-13 00:19:34,739 INFO L87 Difference]: Start difference. First operand 106 states and 106 transitions. Second operand has 101 states, 101 states have (on average 1.0396039603960396) internal successors, (105), 101 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) [2021-10-13 00:19:34,866 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:19:34,866 INFO L93 Difference]: Finished difference Result 111 states and 111 transitions. [2021-10-13 00:19:34,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2021-10-13 00:19:34,867 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 1.0396039603960396) internal successors, (105), 101 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 105 [2021-10-13 00:19:34,867 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:19:34,867 INFO L225 Difference]: With dead ends: 111 [2021-10-13 00:19:34,867 INFO L226 Difference]: Without dead ends: 107 [2021-10-13 00:19:34,869 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3832.5ms TimeCoverageRelationStatistics Valid=5050, Invalid=5050, Unknown=0, NotChecked=0, Total=10100 [2021-10-13 00:19:34,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2021-10-13 00:19:34,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 107. [2021-10-13 00:19:34,873 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) [2021-10-13 00:19:34,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 107 states to 107 states and 107 transitions. [2021-10-13 00:19:34,873 INFO L78 Accepts]: Start accepts. Automaton has 107 states and 107 transitions. Word has length 105 [2021-10-13 00:19:34,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:19:34,874 INFO L470 AbstractCegarLoop]: Abstraction has 107 states and 107 transitions. [2021-10-13 00:19:34,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 1.0396039603960396) internal successors, (105), 101 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) [2021-10-13 00:19:34,874 INFO L276 IsEmpty]: Start isEmpty. Operand 107 states and 107 transitions. [2021-10-13 00:19:34,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 107 [2021-10-13 00:19:34,875 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:19:34,875 INFO L512 BasicCegarLoop]: trace histogram [99, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:19:34,925 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Ended with exit code 0 [2021-10-13 00:19:35,096 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-10-13 00:19:35,097 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:19:35,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:19:35,097 INFO L82 PathProgramCache]: Analyzing trace with hash 1273986067, now seen corresponding path program 99 times [2021-10-13 00:19:35,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:19:35,097 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1961632991] [2021-10-13 00:19:35,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:19:35,098 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:19:35,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:39,156 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:19:39,156 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:19:39,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1961632991] [2021-10-13 00:19:39,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1961632991] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:19:39,157 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217346888] [2021-10-13 00:19:39,157 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-13 00:19:39,157 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:19:39,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:19:39,158 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:19:39,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-10-13 00:19:41,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 51 check-sat command(s) [2021-10-13 00:19:41,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:19:41,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 540 conjuncts, 101 conjunts are in the unsatisfiable core [2021-10-13 00:19:41,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:19:41,715 INFO L134 CoverageAnalysis]: Checked inductivity of 4950 backedges. 0 proven. 4950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:19:41,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1217346888] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:19:41,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:19:41,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [102, 102] total 102 [2021-10-13 00:19:41,718 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636818133] [2021-10-13 00:19:41,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 102 states [2021-10-13 00:19:41,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:19:41,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 102 interpolants. [2021-10-13 00:19:41,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2021-10-13 00:19:41,721 INFO L87 Difference]: Start difference. First operand 107 states and 107 transitions. Second operand has 102 states, 102 states have (on average 1.0392156862745099) internal successors, (106), 102 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:19:41,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:19:41,885 INFO L93 Difference]: Finished difference Result 112 states and 112 transitions. [2021-10-13 00:19:41,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 102 states. [2021-10-13 00:19:41,886 INFO L78 Accepts]: Start accepts. Automaton has has 102 states, 102 states have (on average 1.0392156862745099) internal successors, (106), 102 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 106 [2021-10-13 00:19:41,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:19:41,887 INFO L225 Difference]: With dead ends: 112 [2021-10-13 00:19:41,887 INFO L226 Difference]: Without dead ends: 108 [2021-10-13 00:19:41,888 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 208 GetRequests, 108 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3769.5ms TimeCoverageRelationStatistics Valid=5151, Invalid=5151, Unknown=0, NotChecked=0, Total=10302 [2021-10-13 00:19:41,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2021-10-13 00:19:41,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2021-10-13 00:19:41,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.0093457943925233) internal successors, (108), 107 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:19:41,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 108 transitions. [2021-10-13 00:19:41,893 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 108 transitions. Word has length 106 [2021-10-13 00:19:41,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:19:41,893 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 108 transitions. [2021-10-13 00:19:41,894 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 102 states, 102 states have (on average 1.0392156862745099) internal successors, (106), 102 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:19:41,894 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 108 transitions. [2021-10-13 00:19:41,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2021-10-13 00:19:41,922 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:19:41,922 INFO L512 BasicCegarLoop]: trace histogram [100, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:19:41,976 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Forceful destruction successful, exit code 0 [2021-10-13 00:19:42,122 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-10-13 00:19:42,123 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:19:42,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:19:42,123 INFO L82 PathProgramCache]: Analyzing trace with hash 840527819, now seen corresponding path program 100 times [2021-10-13 00:19:42,123 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:19:42,123 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [770626464] [2021-10-13 00:19:42,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:19:42,123 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:19:42,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:19:47,533 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:19:47,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:19:47,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [770626464] [2021-10-13 00:19:47,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [770626464] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:19:47,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65663607] [2021-10-13 00:19:47,535 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-13 00:19:47,535 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-13 00:19:47,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 [2021-10-13 00:19:47,537 INFO L229 MonitoredProcess]: Starting monitored process 101 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-13 00:19:47,538 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Waiting until timeout for monitored process [2021-10-13 00:19:49,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-13 00:19:49,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-13 00:19:49,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 545 conjuncts, 205 conjunts are in the unsatisfiable core [2021-10-13 00:19:49,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-13 00:19:50,862 INFO L134 CoverageAnalysis]: Checked inductivity of 5050 backedges. 0 proven. 5050 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:19:50,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65663607] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-13 00:19:50,862 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-13 00:19:50,862 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [104, 104] total 105 [2021-10-13 00:19:50,863 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978836803] [2021-10-13 00:19:50,863 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2021-10-13 00:19:50,863 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:19:50,863 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2021-10-13 00:19:50,864 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=10712, Unknown=0, NotChecked=0, Total=10920 [2021-10-13 00:19:50,864 INFO L87 Difference]: Start difference. First operand 108 states and 108 transitions. Second operand has 105 states, 105 states have (on average 1.0380952380952382) internal successors, (109), 105 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) [2021-10-13 00:19:55,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:19:55,632 INFO L93 Difference]: Finished difference Result 113 states and 113 transitions. [2021-10-13 00:19:55,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2021-10-13 00:19:55,633 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 105 states have (on average 1.0380952380952382) internal successors, (109), 105 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 107 [2021-10-13 00:19:55,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:19:55,633 INFO L225 Difference]: With dead ends: 113 [2021-10-13 00:19:55,634 INFO L226 Difference]: Without dead ends: 109 [2021-10-13 00:19:55,634 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 211 GetRequests, 105 SyntacticMatches, 2 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 5109.5ms TimeCoverageRelationStatistics Valid=213, Invalid=10917, Unknown=0, NotChecked=0, Total=11130 [2021-10-13 00:19:55,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2021-10-13 00:19:55,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2021-10-13 00:19:55,639 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) [2021-10-13 00:19:55,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 109 transitions. [2021-10-13 00:19:55,640 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 109 transitions. Word has length 107 [2021-10-13 00:19:55,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:19:55,640 INFO L470 AbstractCegarLoop]: Abstraction has 109 states and 109 transitions. [2021-10-13 00:19:55,640 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 105 states have (on average 1.0380952380952382) internal successors, (109), 105 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) [2021-10-13 00:19:55,641 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 109 transitions. [2021-10-13 00:19:55,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 109 [2021-10-13 00:19:55,642 INFO L504 BasicCegarLoop]: Found error trace [2021-10-13 00:19:55,642 INFO L512 BasicCegarLoop]: trace histogram [101, 1, 1, 1, 1, 1, 1, 1] [2021-10-13 00:19:55,694 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true (101)] Forceful destruction successful, exit code 0 [2021-10-13 00:19:55,866 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-10-13 00:19:55,866 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-13 00:19:55,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-13 00:19:55,867 INFO L82 PathProgramCache]: Analyzing trace with hash 288224019, now seen corresponding path program 101 times [2021-10-13 00:19:55,867 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-13 00:19:55,867 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771313385] [2021-10-13 00:19:55,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-13 00:19:55,867 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-13 00:19:56,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-13 00:20:01,254 INFO L134 CoverageAnalysis]: Checked inductivity of 5151 backedges. 5151 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-13 00:20:01,254 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-13 00:20:01,254 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771313385] [2021-10-13 00:20:01,254 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [771313385] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-13 00:20:01,255 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-13 00:20:01,255 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [103] imperfect sequences [] total 103 [2021-10-13 00:20:01,255 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031495120] [2021-10-13 00:20:01,255 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2021-10-13 00:20:01,256 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-13 00:20:01,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2021-10-13 00:20:01,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2021-10-13 00:20:01,259 INFO L87 Difference]: Start difference. First operand 109 states and 109 transitions. Second operand has 103 states, 103 states have (on average 1.0485436893203883) internal successors, (108), 103 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:20:01,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-13 00:20:01,661 INFO L93 Difference]: Finished difference Result 109 states and 109 transitions. [2021-10-13 00:20:01,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 103 states. [2021-10-13 00:20:01,662 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 1.0485436893203883) internal successors, (108), 103 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 108 [2021-10-13 00:20:01,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-13 00:20:01,662 INFO L225 Difference]: With dead ends: 109 [2021-10-13 00:20:01,662 INFO L226 Difference]: Without dead ends: 0 [2021-10-13 00:20:01,664 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 4892.4ms TimeCoverageRelationStatistics Valid=5253, Invalid=5253, Unknown=0, NotChecked=0, Total=10506 [2021-10-13 00:20:01,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-13 00:20:01,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-13 00:20:01,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:20:01,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-13 00:20:01,665 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 108 [2021-10-13 00:20:01,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-13 00:20:01,665 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-13 00:20:01,666 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 1.0485436893203883) internal successors, (108), 103 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-13 00:20:01,666 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-13 00:20:01,666 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-13 00:20:01,669 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-13 00:20:01,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2021-10-13 00:20:01,673 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends 0 states and 0 transitions. [2021-10-13 00:20:01,678 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 00:20:01,967 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout 10000 ms and remaining time -1 ms [2021-10-13 00:20:04,053 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startEXIT(line -1) no Hoare annotation was computed. [2021-10-13 00:20:04,056 INFO L853 garLoopResultBuilder]: At program point L23-2(lines 23 26) the Hoare annotation is: (or (and (<= ULTIMATE.start_main_~i~0 32) (<= ULTIMATE.start_main_~j~0 64) (<= 64 ULTIMATE.start_main_~j~0) (<= 32 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~i~0 67) (<= 67 ULTIMATE.start_main_~i~0) (<= 134 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 134)) (and (<= ULTIMATE.start_main_~i~0 24) (<= 48 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 48) (<= 24 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~i~0 98) (<= 98 ULTIMATE.start_main_~i~0) (<= 196 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 196)) (and (<= 38 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 38) (<= 19 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 19)) (and (<= 8 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 16) (<= ULTIMATE.start_main_~i~0 8) (<= 16 ULTIMATE.start_main_~j~0)) (and (<= 114 ULTIMATE.start_main_~j~0) (<= 57 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 114) (<= ULTIMATE.start_main_~i~0 57)) (and (<= ULTIMATE.start_main_~j~0 128) (<= 128 ULTIMATE.start_main_~j~0) (<= 64 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 64)) (and (<= ULTIMATE.start_main_~j~0 52) (<= 26 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 26) (<= 52 ULTIMATE.start_main_~j~0)) (and (<= ULTIMATE.start_main_~j~0 178) (<= 178 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 89) (<= 89 ULTIMATE.start_main_~i~0)) (and (<= 28 ULTIMATE.start_main_~j~0) (<= 14 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 28) (<= ULTIMATE.start_main_~i~0 14)) (and (<= 192 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 96) (<= ULTIMATE.start_main_~j~0 192) (<= 96 ULTIMATE.start_main_~i~0)) (and (<= 60 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 60) (<= ULTIMATE.start_main_~j~0 120) (<= 120 ULTIMATE.start_main_~j~0)) (and (<= ULTIMATE.start_main_~i~0 69) (<= ULTIMATE.start_main_~j~0 138) (<= 69 ULTIMATE.start_main_~i~0) (<= 138 ULTIMATE.start_main_~j~0)) (and (<= ULTIMATE.start_main_~j~0 172) (<= ULTIMATE.start_main_~i~0 86) (<= 86 ULTIMATE.start_main_~i~0) (<= 172 ULTIMATE.start_main_~j~0)) (and (<= 148 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 74) (<= ULTIMATE.start_main_~j~0 148) (<= 74 ULTIMATE.start_main_~i~0)) (and (<= 136 ULTIMATE.start_main_~j~0) (<= 68 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 68) (<= ULTIMATE.start_main_~j~0 136)) (and (<= ULTIMATE.start_main_~j~0 20) (<= ULTIMATE.start_main_~i~0 10) (<= 10 ULTIMATE.start_main_~i~0) (<= 20 ULTIMATE.start_main_~j~0)) (and (<= ULTIMATE.start_main_~i~0 46) (<= 92 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 92) (<= 46 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~j~0 102) (<= 102 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 51) (<= 51 ULTIMATE.start_main_~i~0)) (and (<= 56 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 56) (<= ULTIMATE.start_main_~j~0 112) (<= 112 ULTIMATE.start_main_~j~0)) (and (<= ULTIMATE.start_main_~j~0 108) (<= ULTIMATE.start_main_~i~0 54) (<= 108 ULTIMATE.start_main_~j~0) (<= 54 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~i~0 44) (<= ULTIMATE.start_main_~j~0 88) (<= 44 ULTIMATE.start_main_~i~0) (<= 88 ULTIMATE.start_main_~j~0)) (and (<= 75 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 150) (<= ULTIMATE.start_main_~i~0 75) (<= 150 ULTIMATE.start_main_~j~0)) (and (<= ULTIMATE.start_main_~i~0 91) (<= 182 ULTIMATE.start_main_~j~0) (<= 91 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 182)) (and (<= 6 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 12) (<= ULTIMATE.start_main_~i~0 6) (<= 12 ULTIMATE.start_main_~j~0)) (and (<= 194 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 194) (<= 97 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 97)) (and (<= 188 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 94) (<= ULTIMATE.start_main_~j~0 188) (<= 94 ULTIMATE.start_main_~i~0)) (and (<= 180 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 180) (<= 90 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 90)) (and (<= 5 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 5) (<= ULTIMATE.start_main_~j~0 10) (<= 10 ULTIMATE.start_main_~j~0)) (and (<= ULTIMATE.start_main_~j~0 84) (<= 84 ULTIMATE.start_main_~j~0) (<= 42 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 42)) (and (<= ULTIMATE.start_main_~i~0 11) (<= 22 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 22) (<= 11 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~i~0 84) (<= 168 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 168) (<= 84 ULTIMATE.start_main_~i~0)) (and (<= 66 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 33) (<= ULTIMATE.start_main_~j~0 66) (<= 33 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~i~0 85) (<= ULTIMATE.start_main_~j~0 170) (<= 85 ULTIMATE.start_main_~i~0) (<= 170 ULTIMATE.start_main_~j~0)) (and (<= 34 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 17) (<= ULTIMATE.start_main_~j~0 34) (<= 17 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~j~0 122) (<= 61 ULTIMATE.start_main_~i~0) (<= 122 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 61)) (and (<= 72 ULTIMATE.start_main_~j~0) (<= 36 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 72) (<= ULTIMATE.start_main_~i~0 36)) (and (<= 174 ULTIMATE.start_main_~j~0) (<= 87 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 87) (<= ULTIMATE.start_main_~j~0 174)) (and (<= ULTIMATE.start_main_~i~0 70) (<= 140 ULTIMATE.start_main_~j~0) (<= 70 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 140)) (and (<= 38 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 38) (<= ULTIMATE.start_main_~j~0 76) (<= 76 ULTIMATE.start_main_~j~0)) (and (<= ULTIMATE.start_main_~j~0 14) (<= ULTIMATE.start_main_~i~0 7) (<= 14 ULTIMATE.start_main_~j~0) (<= 7 ULTIMATE.start_main_~i~0)) (and (<= 82 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 82) (<= 164 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 164)) (and (<= 73 ULTIMATE.start_main_~i~0) (<= 146 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 73) (<= ULTIMATE.start_main_~j~0 146)) (and (<= ULTIMATE.start_main_~i~0 1) (<= 2 ULTIMATE.start_main_~j~0) (<= 1 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 2)) (and (<= ULTIMATE.start_main_~j~0 26) (<= 13 ULTIMATE.start_main_~i~0) (<= 26 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 13)) (and (<= 2 ULTIMATE.start_main_~i~0) (<= 4 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 2) (<= ULTIMATE.start_main_~j~0 4)) (and (<= 130 ULTIMATE.start_main_~j~0) (<= 65 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 65) (<= ULTIMATE.start_main_~j~0 130)) (and (<= ULTIMATE.start_main_~j~0 142) (<= 142 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 71) (<= 71 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~j~0 110) (<= 110 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 55) (<= 55 ULTIMATE.start_main_~i~0)) (and (<= 190 ULTIMATE.start_main_~j~0) (<= 95 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 95) (<= ULTIMATE.start_main_~j~0 190)) (and (<= 24 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 24) (<= ULTIMATE.start_main_~i~0 12) (<= 12 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~j~0 86) (<= 86 ULTIMATE.start_main_~j~0) (<= 43 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 43)) (and (<= ULTIMATE.start_main_~i~0 34) (<= 34 ULTIMATE.start_main_~i~0) (<= 68 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 68)) (and (<= ULTIMATE.start_main_~i~0 20) (<= 20 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 40) (<= 40 ULTIMATE.start_main_~j~0)) (and (<= 41 ULTIMATE.start_main_~i~0) (<= 82 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 41) (<= ULTIMATE.start_main_~j~0 82)) (and (<= ULTIMATE.start_main_~j~0 106) (<= ULTIMATE.start_main_~i~0 53) (<= 53 ULTIMATE.start_main_~i~0) (<= 106 ULTIMATE.start_main_~j~0)) (and (<= ULTIMATE.start_main_~i~0 50) (<= ULTIMATE.start_main_~j~0 100) (<= 100 ULTIMATE.start_main_~j~0) (<= 50 ULTIMATE.start_main_~i~0)) (and (<= 45 ULTIMATE.start_main_~i~0) (<= 90 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 90) (<= ULTIMATE.start_main_~i~0 45)) (and (<= ULTIMATE.start_main_~j~0 62) (<= 31 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 31) (<= 62 ULTIMATE.start_main_~j~0)) (and (<= 80 ULTIMATE.start_main_~i~0) (<= 160 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 160) (<= ULTIMATE.start_main_~i~0 80)) (and (<= 32 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 16) (<= ULTIMATE.start_main_~j~0 32) (<= 16 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~i~0 79) (<= 158 ULTIMATE.start_main_~j~0) (<= 79 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 158)) (and (<= ULTIMATE.start_main_~j~0 74) (<= ULTIMATE.start_main_~i~0 37) (<= 74 ULTIMATE.start_main_~j~0) (<= 37 ULTIMATE.start_main_~i~0)) (and (<= 154 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 77) (<= 77 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 154)) (and (<= 80 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 80) (<= 40 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 40)) (and (<= 3 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 6) (<= ULTIMATE.start_main_~i~0 3) (<= 6 ULTIMATE.start_main_~j~0)) (and (<= ULTIMATE.start_main_~i~0 78) (<= ULTIMATE.start_main_~j~0 156) (<= 156 ULTIMATE.start_main_~j~0) (<= 78 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~j~0 42) (<= 42 ULTIMATE.start_main_~j~0) (<= 21 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 21)) (and (<= ULTIMATE.start_main_~j~0 116) (<= 116 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 58) (<= 58 ULTIMATE.start_main_~i~0)) (and (<= 162 ULTIMATE.start_main_~j~0) (<= 81 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 81) (<= ULTIMATE.start_main_~j~0 162)) (and (<= ULTIMATE.start_main_~i~0 29) (<= 58 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 58) (<= 29 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~i~0 83) (<= 83 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 166) (<= 166 ULTIMATE.start_main_~j~0)) (and (<= 96 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 96) (<= 48 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 48)) (and (<= ULTIMATE.start_main_~j~0 186) (<= 186 ULTIMATE.start_main_~j~0) (<= 93 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 93)) (and (<= 44 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 22) (<= ULTIMATE.start_main_~j~0 44) (<= 22 ULTIMATE.start_main_~i~0)) (and (<= 46 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 46) (<= 23 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 23)) (and (<= 36 ULTIMATE.start_main_~j~0) (<= 18 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 36) (<= ULTIMATE.start_main_~i~0 18)) (and (<= ULTIMATE.start_main_~j~0 70) (<= ULTIMATE.start_main_~i~0 35) (<= 35 ULTIMATE.start_main_~i~0) (<= 70 ULTIMATE.start_main_~j~0)) (and (<= 78 ULTIMATE.start_main_~j~0) (<= 39 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 39) (<= ULTIMATE.start_main_~j~0 78)) (and (<= 54 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 27) (<= 27 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 54)) (and (<= ULTIMATE.start_main_~i~0 66) (<= 132 ULTIMATE.start_main_~j~0) (<= 66 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 132)) (and (<= 15 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 15) (<= 30 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 30)) (and (<= 144 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 144) (<= 72 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 72)) (and (<= ULTIMATE.start_main_~j~0 184) (<= ULTIMATE.start_main_~i~0 92) (<= 184 ULTIMATE.start_main_~j~0) (<= 92 ULTIMATE.start_main_~i~0)) (and (<= 49 ULTIMATE.start_main_~i~0) (<= 98 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 98) (<= ULTIMATE.start_main_~i~0 49)) (and (<= ULTIMATE.start_main_~i~0 76) (<= ULTIMATE.start_main_~j~0 152) (<= 152 ULTIMATE.start_main_~j~0) (<= 76 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~j~0 126) (<= ULTIMATE.start_main_~i~0 63) (<= 63 ULTIMATE.start_main_~i~0) (<= 126 ULTIMATE.start_main_~j~0)) (and (<= ULTIMATE.start_main_~j~0 0) (<= 0 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 0) (<= 0 ULTIMATE.start_main_~j~0)) (and (<= 118 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 59) (<= 59 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 118)) (and (<= ULTIMATE.start_main_~i~0 88) (<= 88 ULTIMATE.start_main_~i~0) (<= 176 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 176)) (and (<= 4 ULTIMATE.start_main_~i~0) (<= 8 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 8) (<= ULTIMATE.start_main_~i~0 4)) (and (<= 104 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 104) (<= 52 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 52)) (and (<= 50 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 50) (<= ULTIMATE.start_main_~i~0 25) (<= 25 ULTIMATE.start_main_~i~0)) (and (<= 198 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~i~0 99) (<= ULTIMATE.start_main_~j~0 198) (<= 99 ULTIMATE.start_main_~i~0)) (and (<= ULTIMATE.start_main_~i~0 28) (<= 28 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 56) (<= 56 ULTIMATE.start_main_~j~0)) (and (<= ULTIMATE.start_main_~i~0 9) (<= 18 ULTIMATE.start_main_~j~0) (<= 9 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 18)) (and (<= 30 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~i~0 30) (<= 60 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 60)) (and (<= 94 ULTIMATE.start_main_~j~0) (<= 47 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 94) (<= ULTIMATE.start_main_~i~0 47)) (and (< 199 ULTIMATE.start_main_~j~0) (<= 100 ULTIMATE.start_main_~i~0) (<= ULTIMATE.start_main_~j~0 200)) (and (<= 62 ULTIMATE.start_main_~i~0) (<= 124 ULTIMATE.start_main_~j~0) (<= ULTIMATE.start_main_~j~0 124) (<= ULTIMATE.start_main_~i~0 62))) [2021-10-13 00:20:04,057 INFO L857 garLoopResultBuilder]: For program point L23-3(lines 23 26) no Hoare annotation was computed. [2021-10-13 00:20:04,057 INFO L857 garLoopResultBuilder]: For program point L15(lines 15 17) no Hoare annotation was computed. [2021-10-13 00:20:04,057 INFO L857 garLoopResultBuilder]: For program point L-1(line -1) no Hoare annotation was computed. [2021-10-13 00:20:04,057 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startENTRY(line -1) no Hoare annotation was computed. [2021-10-13 00:20:04,057 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startFINAL(line -1) no Hoare annotation was computed. [2021-10-13 00:20:04,058 INFO L860 garLoopResultBuilder]: At program point L28(lines 19 29) the Hoare annotation is: true [2021-10-13 00:20:04,058 INFO L857 garLoopResultBuilder]: For program point ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION(line 16) no Hoare annotation was computed. [2021-10-13 00:20:04,058 INFO L857 garLoopResultBuilder]: For program point L22(line 22) no Hoare annotation was computed. [2021-10-13 00:20:04,058 INFO L857 garLoopResultBuilder]: For program point L16(line 16) no Hoare annotation was computed. [2021-10-13 00:20:04,058 INFO L857 garLoopResultBuilder]: For program point L14(lines 14 18) no Hoare annotation was computed. [2021-10-13 00:20:04,063 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-13 00:20:04,130 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 13.10 12:20:04 BoogieIcfgContainer [2021-10-13 00:20:04,130 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-13 00:20:04,131 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-13 00:20:04,131 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-13 00:20:04,132 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-13 00:20:04,132 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 13.10 12:15:36" (3/4) ... [2021-10-13 00:20:04,136 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-13 00:20:04,149 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 7 nodes and edges [2021-10-13 00:20:04,149 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2021-10-13 00:20:04,149 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 00:20:04,150 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-13 00:20:04,198 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/witness.graphml [2021-10-13 00:20:04,198 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-13 00:20:04,200 INFO L168 Benchmark]: Toolchain (without parser) took 268070.95 ms. Allocated memory was 94.4 MB in the beginning and 1.1 GB in the end (delta: 994.1 MB). Free memory was 59.0 MB in the beginning and 179.9 MB in the end (delta: -120.9 MB). Peak memory consumption was 872.4 MB. Max. memory is 16.1 GB. [2021-10-13 00:20:04,201 INFO L168 Benchmark]: CDTParser took 0.32 ms. Allocated memory is still 94.4 MB. Free memory was 64.0 MB in the beginning and 64.0 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-13 00:20:04,201 INFO L168 Benchmark]: CACSL2BoogieTranslator took 249.02 ms. Allocated memory is still 94.4 MB. Free memory was 58.9 MB in the beginning and 69.6 MB in the end (delta: -10.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 00:20:04,202 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.68 ms. Allocated memory is still 94.4 MB. Free memory was 69.6 MB in the beginning and 68.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:20:04,202 INFO L168 Benchmark]: Boogie Preprocessor took 39.56 ms. Allocated memory is still 94.4 MB. Free memory was 68.1 MB in the beginning and 67.2 MB in the end (delta: 907.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:20:04,203 INFO L168 Benchmark]: RCFGBuilder took 318.88 ms. Allocated memory is still 94.4 MB. Free memory was 67.2 MB in the beginning and 58.4 MB in the end (delta: 8.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-13 00:20:04,204 INFO L168 Benchmark]: TraceAbstraction took 267341.02 ms. Allocated memory was 94.4 MB in the beginning and 1.1 GB in the end (delta: 994.1 MB). Free memory was 57.6 MB in the beginning and 183.1 MB in the end (delta: -125.4 MB). Peak memory consumption was 909.2 MB. Max. memory is 16.1 GB. [2021-10-13 00:20:04,204 INFO L168 Benchmark]: Witness Printer took 67.04 ms. Allocated memory is still 1.1 GB. Free memory was 183.1 MB in the beginning and 179.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-13 00:20:04,207 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.32 ms. Allocated memory is still 94.4 MB. Free memory was 64.0 MB in the beginning and 64.0 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 249.02 ms. Allocated memory is still 94.4 MB. Free memory was 58.9 MB in the beginning and 69.6 MB in the end (delta: -10.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 47.68 ms. Allocated memory is still 94.4 MB. Free memory was 69.6 MB in the beginning and 68.1 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 39.56 ms. Allocated memory is still 94.4 MB. Free memory was 68.1 MB in the beginning and 67.2 MB in the end (delta: 907.0 kB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 318.88 ms. Allocated memory is still 94.4 MB. Free memory was 67.2 MB in the beginning and 58.4 MB in the end (delta: 8.8 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * TraceAbstraction took 267341.02 ms. Allocated memory was 94.4 MB in the beginning and 1.1 GB in the end (delta: 994.1 MB). Free memory was 57.6 MB in the beginning and 183.1 MB in the end (delta: -125.4 MB). Peak memory consumption was 909.2 MB. Max. memory is 16.1 GB. * Witness Printer took 67.04 ms. Allocated memory is still 1.1 GB. Free memory was 183.1 MB in the beginning and 179.9 MB in the end (delta: 3.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 16]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 12 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 267209.0ms, OverallIterations: 103, TraceHistogramMax: 101, EmptinessCheckTime: 108.0ms, AutomataDifference: 11518.6ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 2382.3ms, InitialAbstractionConstructionTime: 11.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 722 SDtfs, 1 SDslu, 2273 SDs, 0 SdLazy, 17320 SolverSat, 420 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6988.5ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11211 GetRequests, 5954 SyntacticMatches, 2 SemanticMatches, 5255 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 125887.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=109occurred in iteration=102, InterpolantAutomatonStates: 5459, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 408.7ms AutomataMinimizationTime, 103 MinimizatonAttempts, 0 StatesRemovedByMinimization, 0 NontrivialMinimizations, HoareAnnotationStatistics: 0.0ms HoareAnnotationTime, 2 LocationsWithAnnotation, 2 PreInvPairs, 104 NumberOfFragments, 1312 HoareAnnotationTreeSize, 2 FomulaSimplifications, 0 FormulaSimplificationTreeSizeReduction, 291.9ms HoareSimplificationTime, 2 FomulaSimplificationsInter, 0 FormulaSimplificationTreeSizeReductionInter, 2076.9ms HoareSimplificationTimeInter, RefinementEngineStatistics: TRACE_CHECK: 1299.1ms SsaConstructionTime, 6763.4ms SatisfiabilityAnalysisTime, 154092.6ms InterpolantComputationTime, 11622 NumberOfCodeBlocks, 11622 NumberOfCodeBlocksAsserted, 1495 NumberOfCheckSat, 11419 ConstructedInterpolants, 0 QuantifiedInterpolants, 33048 SizeOfPredicates, 2 NumberOfNonLiveVariables, 29750 ConjunctsInSsa, 5353 ConjunctsInUnsatCore, 203 InterpolantComputations, 3 PerfectInterpolantSequences, 5151/348551 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - InvariantResult [Line: 23]: Loop Invariant Derived loop invariant: ((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((((i <= 32 && j <= 64) && 64 <= j) && 32 <= i) || (((i <= 67 && 67 <= i) && 134 <= j) && j <= 134)) || (((i <= 24 && 48 <= j) && j <= 48) && 24 <= i)) || (((i <= 98 && 98 <= i) && 196 <= j) && j <= 196)) || (((38 <= j && j <= 38) && 19 <= i) && i <= 19)) || (((8 <= i && j <= 16) && i <= 8) && 16 <= j)) || (((114 <= j && 57 <= i) && j <= 114) && i <= 57)) || (((j <= 128 && 128 <= j) && 64 <= i) && i <= 64)) || (((j <= 52 && 26 <= i) && i <= 26) && 52 <= j)) || (((j <= 178 && 178 <= j) && i <= 89) && 89 <= i)) || (((28 <= j && 14 <= i) && j <= 28) && i <= 14)) || (((192 <= j && i <= 96) && j <= 192) && 96 <= i)) || (((60 <= i && i <= 60) && j <= 120) && 120 <= j)) || (((i <= 69 && j <= 138) && 69 <= i) && 138 <= j)) || (((j <= 172 && i <= 86) && 86 <= i) && 172 <= j)) || (((148 <= j && i <= 74) && j <= 148) && 74 <= i)) || (((136 <= j && 68 <= i) && i <= 68) && j <= 136)) || (((j <= 20 && i <= 10) && 10 <= i) && 20 <= j)) || (((i <= 46 && 92 <= j) && j <= 92) && 46 <= i)) || (((j <= 102 && 102 <= j) && i <= 51) && 51 <= i)) || (((56 <= i && i <= 56) && j <= 112) && 112 <= j)) || (((j <= 108 && i <= 54) && 108 <= j) && 54 <= i)) || (((i <= 44 && j <= 88) && 44 <= i) && 88 <= j)) || (((75 <= i && j <= 150) && i <= 75) && 150 <= j)) || (((i <= 91 && 182 <= j) && 91 <= i) && j <= 182)) || (((6 <= i && j <= 12) && i <= 6) && 12 <= j)) || (((194 <= j && j <= 194) && 97 <= i) && i <= 97)) || (((188 <= j && i <= 94) && j <= 188) && 94 <= i)) || (((180 <= j && j <= 180) && 90 <= i) && i <= 90)) || (((5 <= i && i <= 5) && j <= 10) && 10 <= j)) || (((j <= 84 && 84 <= j) && 42 <= i) && i <= 42)) || (((i <= 11 && 22 <= j) && j <= 22) && 11 <= i)) || (((i <= 84 && 168 <= j) && j <= 168) && 84 <= i)) || (((66 <= j && i <= 33) && j <= 66) && 33 <= i)) || (((i <= 85 && j <= 170) && 85 <= i) && 170 <= j)) || (((34 <= j && i <= 17) && j <= 34) && 17 <= i)) || (((j <= 122 && 61 <= i) && 122 <= j) && i <= 61)) || (((72 <= j && 36 <= i) && j <= 72) && i <= 36)) || (((174 <= j && 87 <= i) && i <= 87) && j <= 174)) || (((i <= 70 && 140 <= j) && 70 <= i) && j <= 140)) || (((38 <= i && i <= 38) && j <= 76) && 76 <= j)) || (((j <= 14 && i <= 7) && 14 <= j) && 7 <= i)) || (((82 <= i && i <= 82) && 164 <= j) && j <= 164)) || (((73 <= i && 146 <= j) && i <= 73) && j <= 146)) || (((i <= 1 && 2 <= j) && 1 <= i) && j <= 2)) || (((j <= 26 && 13 <= i) && 26 <= j) && i <= 13)) || (((2 <= i && 4 <= j) && i <= 2) && j <= 4)) || (((130 <= j && 65 <= i) && i <= 65) && j <= 130)) || (((j <= 142 && 142 <= j) && i <= 71) && 71 <= i)) || (((j <= 110 && 110 <= j) && i <= 55) && 55 <= i)) || (((190 <= j && 95 <= i) && i <= 95) && j <= 190)) || (((24 <= j && j <= 24) && i <= 12) && 12 <= i)) || (((j <= 86 && 86 <= j) && 43 <= i) && i <= 43)) || (((i <= 34 && 34 <= i) && 68 <= j) && j <= 68)) || (((i <= 20 && 20 <= i) && j <= 40) && 40 <= j)) || (((41 <= i && 82 <= j) && i <= 41) && j <= 82)) || (((j <= 106 && i <= 53) && 53 <= i) && 106 <= j)) || (((i <= 50 && j <= 100) && 100 <= j) && 50 <= i)) || (((45 <= i && 90 <= j) && j <= 90) && i <= 45)) || (((j <= 62 && 31 <= i) && i <= 31) && 62 <= j)) || (((80 <= i && 160 <= j) && j <= 160) && i <= 80)) || (((32 <= j && i <= 16) && j <= 32) && 16 <= i)) || (((i <= 79 && 158 <= j) && 79 <= i) && j <= 158)) || (((j <= 74 && i <= 37) && 74 <= j) && 37 <= i)) || (((154 <= j && i <= 77) && 77 <= i) && j <= 154)) || (((80 <= j && j <= 80) && 40 <= i) && i <= 40)) || (((3 <= i && j <= 6) && i <= 3) && 6 <= j)) || (((i <= 78 && j <= 156) && 156 <= j) && 78 <= i)) || (((j <= 42 && 42 <= j) && 21 <= i) && i <= 21)) || (((j <= 116 && 116 <= j) && i <= 58) && 58 <= i)) || (((162 <= j && 81 <= i) && i <= 81) && j <= 162)) || (((i <= 29 && 58 <= j) && j <= 58) && 29 <= i)) || (((i <= 83 && 83 <= i) && j <= 166) && 166 <= j)) || (((96 <= j && j <= 96) && 48 <= i) && i <= 48)) || (((j <= 186 && 186 <= j) && 93 <= i) && i <= 93)) || (((44 <= j && i <= 22) && j <= 44) && 22 <= i)) || (((46 <= j && j <= 46) && 23 <= i) && i <= 23)) || (((36 <= j && 18 <= i) && j <= 36) && i <= 18)) || (((j <= 70 && i <= 35) && 35 <= i) && 70 <= j)) || (((78 <= j && 39 <= i) && i <= 39) && j <= 78)) || (((54 <= j && i <= 27) && 27 <= i) && j <= 54)) || (((i <= 66 && 132 <= j) && 66 <= i) && j <= 132)) || (((15 <= i && i <= 15) && 30 <= j) && j <= 30)) || (((144 <= j && j <= 144) && 72 <= i) && i <= 72)) || (((j <= 184 && i <= 92) && 184 <= j) && 92 <= i)) || (((49 <= i && 98 <= j) && j <= 98) && i <= 49)) || (((i <= 76 && j <= 152) && 152 <= j) && 76 <= i)) || (((j <= 126 && i <= 63) && 63 <= i) && 126 <= j)) || (((j <= 0 && 0 <= i) && i <= 0) && 0 <= j)) || (((118 <= j && i <= 59) && 59 <= i) && j <= 118)) || (((i <= 88 && 88 <= i) && 176 <= j) && j <= 176)) || (((4 <= i && 8 <= j) && j <= 8) && i <= 4)) || (((104 <= j && j <= 104) && 52 <= i) && i <= 52)) || (((50 <= j && j <= 50) && i <= 25) && 25 <= i)) || (((198 <= j && i <= 99) && j <= 198) && 99 <= i)) || (((i <= 28 && 28 <= i) && j <= 56) && 56 <= j)) || (((i <= 9 && 18 <= j) && 9 <= i) && j <= 18)) || (((30 <= i && i <= 30) && 60 <= j) && j <= 60)) || (((94 <= j && 47 <= i) && j <= 94) && i <= 47)) || ((199 < j && 100 <= i) && j <= 200)) || (((62 <= i && 124 <= j) && j <= 124) && i <= 62) - InvariantResult [Line: 19]: Loop Invariant Derived loop invariant: 1 RESULT: Ultimate proved your program to be correct! [2021-10-13 00:20:04,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_61f465c0-3e4e-4d72-a30e-66e99df74857/bin/uautomizer-WNIpwEf4Nt/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...