./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/nested_delay_notd2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e943c265 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/nested_delay_notd2.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be --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 a8791b6973aa1a0d5421161a634fa2e6c3276aa5fd05ed6d81de7a2762aa206a ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................... Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-e943c26 [2021-10-21 19:53:32,681 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-21 19:53:32,683 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-21 19:53:32,716 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-21 19:53:32,717 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-21 19:53:32,718 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-21 19:53:32,720 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-21 19:53:32,723 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-21 19:53:32,725 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-21 19:53:32,726 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-21 19:53:32,728 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-21 19:53:32,729 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-21 19:53:32,730 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-21 19:53:32,732 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-21 19:53:32,733 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-21 19:53:32,735 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-21 19:53:32,737 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-21 19:53:32,738 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-21 19:53:32,741 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-21 19:53:32,743 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-21 19:53:32,746 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-21 19:53:32,747 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-21 19:53:32,749 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-21 19:53:32,750 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-21 19:53:32,754 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-21 19:53:32,754 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-21 19:53:32,755 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-21 19:53:32,756 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-21 19:53:32,757 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-21 19:53:32,758 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-21 19:53:32,759 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-21 19:53:32,760 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-21 19:53:32,761 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-21 19:53:32,762 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-21 19:53:32,764 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-21 19:53:32,764 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-21 19:53:32,765 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-21 19:53:32,766 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-21 19:53:32,766 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-21 19:53:32,767 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-21 19:53:32,768 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-21 19:53:32,769 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-21 19:53:32,796 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-21 19:53:32,796 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-21 19:53:32,796 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-21 19:53:32,797 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-21 19:53:32,798 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-21 19:53:32,798 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-21 19:53:32,798 INFO L138 SettingsManager]: * Use SBE=true [2021-10-21 19:53:32,799 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-21 19:53:32,799 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-21 19:53:32,799 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-21 19:53:32,799 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-21 19:53:32,800 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-21 19:53:32,800 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-21 19:53:32,800 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-21 19:53:32,800 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-21 19:53:32,801 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-21 19:53:32,801 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-21 19:53:32,801 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-21 19:53:32,801 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-21 19:53:32,802 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-21 19:53:32,802 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-21 19:53:32,802 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-21 19:53:32,802 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:53:32,803 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-21 19:53:32,803 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-21 19:53:32,803 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-21 19:53:32,803 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-21 19:53:32,804 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-21 19:53:32,804 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-10-21 19:53:32,804 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-10-21 19:53:32,804 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-21 19:53:32,805 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-21 19:53:32,805 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_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a8791b6973aa1a0d5421161a634fa2e6c3276aa5fd05ed6d81de7a2762aa206a [2021-10-21 19:53:33,110 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-21 19:53:33,137 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-21 19:53:33,140 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-21 19:53:33,141 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-21 19:53:33,142 INFO L275 PluginConnector]: CDTParser initialized [2021-10-21 19:53:33,143 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/../../sv-benchmarks/c/loops-crafted-1/nested_delay_notd2.c [2021-10-21 19:53:33,221 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/data/f36846e9b/0f070d1402634cbda0c392a36fea893f/FLAGec3d0c85d [2021-10-21 19:53:33,737 INFO L306 CDTParser]: Found 1 translation units. [2021-10-21 19:53:33,738 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/sv-benchmarks/c/loops-crafted-1/nested_delay_notd2.c [2021-10-21 19:53:33,749 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/data/f36846e9b/0f070d1402634cbda0c392a36fea893f/FLAGec3d0c85d [2021-10-21 19:53:34,096 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/data/f36846e9b/0f070d1402634cbda0c392a36fea893f [2021-10-21 19:53:34,098 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-21 19:53:34,100 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-21 19:53:34,103 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-21 19:53:34,104 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-21 19:53:34,107 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-21 19:53:34,108 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:53:34" (1/1) ... [2021-10-21 19:53:34,111 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@45b37164 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:53:34, skipping insertion in model container [2021-10-21 19:53:34,111 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 07:53:34" (1/1) ... [2021-10-21 19:53:34,119 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-21 19:53:34,133 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-21 19:53:34,311 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_1711c28c-56fd-44ca-8b22-0a0a0e393b75/sv-benchmarks/c/loops-crafted-1/nested_delay_notd2.c[468,481] [2021-10-21 19:53:34,331 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:53:34,339 INFO L203 MainTranslator]: Completed pre-run [2021-10-21 19:53:34,352 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_1711c28c-56fd-44ca-8b22-0a0a0e393b75/sv-benchmarks/c/loops-crafted-1/nested_delay_notd2.c[468,481] [2021-10-21 19:53:34,358 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-21 19:53:34,372 INFO L208 MainTranslator]: Completed translation [2021-10-21 19:53:34,372 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:53:34 WrapperNode [2021-10-21 19:53:34,372 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-21 19:53:34,374 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-21 19:53:34,374 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-21 19:53:34,374 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-21 19:53:34,381 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:53:34" (1/1) ... [2021-10-21 19:53:34,388 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:53:34" (1/1) ... [2021-10-21 19:53:34,407 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-21 19:53:34,408 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-21 19:53:34,408 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-21 19:53:34,408 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-21 19:53:34,416 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:53:34" (1/1) ... [2021-10-21 19:53:34,417 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:53:34" (1/1) ... [2021-10-21 19:53:34,418 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:53:34" (1/1) ... [2021-10-21 19:53:34,418 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:53:34" (1/1) ... [2021-10-21 19:53:34,422 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:53:34" (1/1) ... [2021-10-21 19:53:34,427 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:53:34" (1/1) ... [2021-10-21 19:53:34,428 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:53:34" (1/1) ... [2021-10-21 19:53:34,430 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-21 19:53:34,431 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-21 19:53:34,431 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-21 19:53:34,431 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-21 19:53:34,432 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:53:34" (1/1) ... [2021-10-21 19:53:34,445 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-21 19:53:34,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:53:34,484 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-21 19:53:34,512 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-21 19:53:34,530 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-21 19:53:34,530 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-21 19:53:34,531 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-21 19:53:34,531 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-21 19:53:34,800 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-21 19:53:34,801 INFO L299 CfgBuilder]: Removed 10 assume(true) statements. [2021-10-21 19:53:34,803 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:53:34 BoogieIcfgContainer [2021-10-21 19:53:34,803 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-21 19:53:34,805 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-21 19:53:34,805 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-21 19:53:34,834 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-21 19:53:34,834 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 07:53:34" (1/3) ... [2021-10-21 19:53:34,835 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46a48fde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:53:34, skipping insertion in model container [2021-10-21 19:53:34,835 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 07:53:34" (2/3) ... [2021-10-21 19:53:34,836 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@46a48fde and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 07:53:34, skipping insertion in model container [2021-10-21 19:53:34,836 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:53:34" (3/3) ... [2021-10-21 19:53:34,837 INFO L111 eAbstractionObserver]: Analyzing ICFG nested_delay_notd2.c [2021-10-21 19:53:34,842 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-21 19:53:34,843 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-21 19:53:34,924 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-21 19:53:34,931 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-21 19:53:34,931 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-10-21 19:53:34,946 INFO L276 IsEmpty]: Start isEmpty. Operand has 20 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 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) [2021-10-21 19:53:34,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-21 19:53:34,951 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:53:34,952 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:53:34,952 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:53:34,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:53:34,958 INFO L82 PathProgramCache]: Analyzing trace with hash -493598204, now seen corresponding path program 1 times [2021-10-21 19:53:34,967 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:53:34,968 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [166033088] [2021-10-21 19:53:34,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:53:34,969 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:53:35,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:53:35,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:53:35,115 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:53:35,115 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [166033088] [2021-10-21 19:53:35,116 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [166033088] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:53:35,116 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:53:35,117 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-21 19:53:35,118 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [687939082] [2021-10-21 19:53:35,123 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-10-21 19:53:35,124 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:53:35,136 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-10-21 19:53:35,137 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-10-21 19:53:35,139 INFO L87 Difference]: Start difference. First operand has 20 states, 18 states have (on average 1.6666666666666667) internal successors, (30), 19 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) Second operand has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 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) [2021-10-21 19:53:35,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:53:35,153 INFO L93 Difference]: Finished difference Result 33 states and 53 transitions. [2021-10-21 19:53:35,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-10-21 19:53:35,154 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 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 [2021-10-21 19:53:35,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:53:35,162 INFO L225 Difference]: With dead ends: 33 [2021-10-21 19:53:35,162 INFO L226 Difference]: Without dead ends: 16 [2021-10-21 19:53:35,165 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 [2021-10-21 19:53:35,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2021-10-21 19:53:35,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2021-10-21 19:53:35,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.4666666666666666) internal successors, (22), 15 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) [2021-10-21 19:53:35,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 22 transitions. [2021-10-21 19:53:35,194 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 22 transitions. Word has length 12 [2021-10-21 19:53:35,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:53:35,195 INFO L470 AbstractCegarLoop]: Abstraction has 16 states and 22 transitions. [2021-10-21 19:53:35,195 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 6.0) internal successors, (12), 2 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) [2021-10-21 19:53:35,196 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 22 transitions. [2021-10-21 19:53:35,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-10-21 19:53:35,196 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:53:35,196 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:53:35,197 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-21 19:53:35,197 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:53:35,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:53:35,198 INFO L82 PathProgramCache]: Analyzing trace with hash -2059231113, now seen corresponding path program 1 times [2021-10-21 19:53:35,198 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:53:35,199 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418394930] [2021-10-21 19:53:35,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:53:35,199 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:53:35,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:53:35,333 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:53:35,334 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:53:35,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418394930] [2021-10-21 19:53:35,334 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418394930] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:53:35,334 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:53:35,334 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:53:35,335 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165250016] [2021-10-21 19:53:35,336 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:53:35,336 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:53:35,337 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:53:35,337 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:53:35,337 INFO L87 Difference]: Start difference. First operand 16 states and 22 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 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) [2021-10-21 19:53:35,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:53:35,404 INFO L93 Difference]: Finished difference Result 32 states and 46 transitions. [2021-10-21 19:53:35,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:53:35,405 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 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 [2021-10-21 19:53:35,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:53:35,406 INFO L225 Difference]: With dead ends: 32 [2021-10-21 19:53:35,407 INFO L226 Difference]: Without dead ends: 20 [2021-10-21 19:53:35,408 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 27.6ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:53:35,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2021-10-21 19:53:35,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 17. [2021-10-21 19:53:35,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 16 states have (on average 1.4375) internal successors, (23), 16 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) [2021-10-21 19:53:35,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 23 transitions. [2021-10-21 19:53:35,417 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 23 transitions. Word has length 12 [2021-10-21 19:53:35,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:53:35,418 INFO L470 AbstractCegarLoop]: Abstraction has 17 states and 23 transitions. [2021-10-21 19:53:35,418 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 3 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) [2021-10-21 19:53:35,418 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 23 transitions. [2021-10-21 19:53:35,419 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-21 19:53:35,419 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:53:35,419 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:53:35,420 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-21 19:53:35,421 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:53:35,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:53:35,422 INFO L82 PathProgramCache]: Analyzing trace with hash 573171571, now seen corresponding path program 1 times [2021-10-21 19:53:35,422 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:53:35,422 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065609392] [2021-10-21 19:53:35,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:53:35,424 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:53:35,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:53:35,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:53:35,501 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:53:35,502 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065609392] [2021-10-21 19:53:35,505 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065609392] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:53:35,505 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:53:35,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:53:35,506 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031888514] [2021-10-21 19:53:35,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:53:35,507 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:53:35,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:53:35,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:53:35,509 INFO L87 Difference]: Start difference. First operand 17 states and 23 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2021-10-21 19:53:35,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:53:35,557 INFO L93 Difference]: Finished difference Result 38 states and 53 transitions. [2021-10-21 19:53:35,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:53:35,558 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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 [2021-10-21 19:53:35,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:53:35,559 INFO L225 Difference]: With dead ends: 38 [2021-10-21 19:53:35,559 INFO L226 Difference]: Without dead ends: 25 [2021-10-21 19:53:35,560 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 3.9ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:53:35,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2021-10-21 19:53:35,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 18. [2021-10-21 19:53:35,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.411764705882353) internal successors, (24), 17 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) [2021-10-21 19:53:35,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 24 transitions. [2021-10-21 19:53:35,567 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 24 transitions. Word has length 15 [2021-10-21 19:53:35,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:53:35,567 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 24 transitions. [2021-10-21 19:53:35,568 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2021-10-21 19:53:35,568 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 24 transitions. [2021-10-21 19:53:35,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-21 19:53:35,569 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:53:35,569 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:53:35,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-21 19:53:35,569 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:53:35,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:53:35,570 INFO L82 PathProgramCache]: Analyzing trace with hash 630429873, now seen corresponding path program 1 times [2021-10-21 19:53:35,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:53:35,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773285438] [2021-10-21 19:53:35,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:53:35,571 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:53:35,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:53:35,718 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-10-21 19:53:35,719 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:53:35,719 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773285438] [2021-10-21 19:53:35,723 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773285438] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:53:35,723 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:53:35,723 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:53:35,723 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670092246] [2021-10-21 19:53:35,724 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:53:35,724 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:53:35,724 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:53:35,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:53:35,725 INFO L87 Difference]: Start difference. First operand 18 states and 24 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 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) [2021-10-21 19:53:35,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:53:35,773 INFO L93 Difference]: Finished difference Result 46 states and 64 transitions. [2021-10-21 19:53:35,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:53:35,774 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 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 [2021-10-21 19:53:35,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:53:35,776 INFO L225 Difference]: With dead ends: 46 [2021-10-21 19:53:35,777 INFO L226 Difference]: Without dead ends: 32 [2021-10-21 19:53:35,778 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 8.7ms TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2021-10-21 19:53:35,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2021-10-21 19:53:35,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 30. [2021-10-21 19:53:35,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.4482758620689655) internal successors, (42), 29 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) [2021-10-21 19:53:35,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 42 transitions. [2021-10-21 19:53:35,793 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 42 transitions. Word has length 15 [2021-10-21 19:53:35,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:53:35,793 INFO L470 AbstractCegarLoop]: Abstraction has 30 states and 42 transitions. [2021-10-21 19:53:35,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 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) [2021-10-21 19:53:35,794 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 42 transitions. [2021-10-21 19:53:35,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-21 19:53:35,794 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:53:35,795 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:53:35,795 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-21 19:53:35,795 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:53:35,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:53:35,796 INFO L82 PathProgramCache]: Analyzing trace with hash 630489455, now seen corresponding path program 1 times [2021-10-21 19:53:35,796 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:53:35,796 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184827616] [2021-10-21 19:53:35,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:53:35,797 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:53:35,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:53:35,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:53:35,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:53:35,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184827616] [2021-10-21 19:53:35,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184827616] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:53:35,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866981378] [2021-10-21 19:53:35,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:53:35,905 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:53:35,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:53:35,909 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:53:35,930 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-21 19:53:35,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:53:35,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 4 conjunts are in the unsatisfiable core [2021-10-21 19:53:35,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:53:36,129 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:53:36,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866981378] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:53:36,130 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:53:36,130 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 6 [2021-10-21 19:53:36,130 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794840704] [2021-10-21 19:53:36,131 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-21 19:53:36,131 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:53:36,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-21 19:53:36,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:53:36,132 INFO L87 Difference]: Start difference. First operand 30 states and 42 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 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) [2021-10-21 19:53:36,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:53:36,192 INFO L93 Difference]: Finished difference Result 67 states and 97 transitions. [2021-10-21 19:53:36,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:53:36,193 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 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 15 [2021-10-21 19:53:36,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:53:36,194 INFO L225 Difference]: With dead ends: 67 [2021-10-21 19:53:36,194 INFO L226 Difference]: Without dead ends: 41 [2021-10-21 19:53:36,194 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 34.5ms TimeCoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-10-21 19:53:36,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2021-10-21 19:53:36,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 36. [2021-10-21 19:53:36,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.4285714285714286) internal successors, (50), 35 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) [2021-10-21 19:53:36,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 50 transitions. [2021-10-21 19:53:36,201 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 50 transitions. Word has length 15 [2021-10-21 19:53:36,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:53:36,201 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 50 transitions. [2021-10-21 19:53:36,201 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 6 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) [2021-10-21 19:53:36,202 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 50 transitions. [2021-10-21 19:53:36,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-21 19:53:36,202 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:53:36,202 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:53:36,237 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-21 19:53:36,428 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:53:36,428 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:53:36,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:53:36,429 INFO L82 PathProgramCache]: Analyzing trace with hash 730990835, now seen corresponding path program 2 times [2021-10-21 19:53:36,429 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:53:36,429 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029727777] [2021-10-21 19:53:36,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:53:36,429 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:53:36,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:53:36,505 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:53:36,506 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:53:36,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029727777] [2021-10-21 19:53:36,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029727777] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:53:36,507 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666301102] [2021-10-21 19:53:36,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:53:36,508 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:53:36,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:53:36,509 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:53:36,542 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-21 19:53:36,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:53:36,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:53:36,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 19:53:36,585 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:53:36,738 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-21 19:53:36,739 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1666301102] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:53:36,739 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:53:36,739 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-10-21 19:53:36,739 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530315441] [2021-10-21 19:53:36,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:53:36,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:53:36,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:53:36,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:53:36,742 INFO L87 Difference]: Start difference. First operand 36 states and 50 transitions. Second operand has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 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) [2021-10-21 19:53:36,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:53:36,999 INFO L93 Difference]: Finished difference Result 123 states and 179 transitions. [2021-10-21 19:53:37,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 19:53:37,000 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 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 18 [2021-10-21 19:53:37,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:53:37,001 INFO L225 Difference]: With dead ends: 123 [2021-10-21 19:53:37,002 INFO L226 Difference]: Without dead ends: 91 [2021-10-21 19:53:37,002 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 117.1ms TimeCoverageRelationStatistics Valid=82, Invalid=158, Unknown=0, NotChecked=0, Total=240 [2021-10-21 19:53:37,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2021-10-21 19:53:37,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 76. [2021-10-21 19:53:37,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.3466666666666667) internal successors, (101), 75 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) [2021-10-21 19:53:37,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 101 transitions. [2021-10-21 19:53:37,023 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 101 transitions. Word has length 18 [2021-10-21 19:53:37,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:53:37,023 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 101 transitions. [2021-10-21 19:53:37,023 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 3.0) internal successors, (27), 8 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) [2021-10-21 19:53:37,024 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 101 transitions. [2021-10-21 19:53:37,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-10-21 19:53:37,025 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:53:37,025 INFO L512 BasicCegarLoop]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:53:37,078 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-21 19:53:37,244 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-10-21 19:53:37,244 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:53:37,245 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:53:37,245 INFO L82 PathProgramCache]: Analyzing trace with hash -104466575, now seen corresponding path program 1 times [2021-10-21 19:53:37,245 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:53:37,245 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175737661] [2021-10-21 19:53:37,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:53:37,245 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:53:37,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:53:37,326 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:53:37,326 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:53:37,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175737661] [2021-10-21 19:53:37,327 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175737661] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:53:37,327 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1007467762] [2021-10-21 19:53:37,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:53:37,328 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:53:37,328 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:53:37,329 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:53:37,332 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-21 19:53:37,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:53:37,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-21 19:53:37,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:53:37,536 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:53:37,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1007467762] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:53:37,537 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:53:37,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-10-21 19:53:37,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978856008] [2021-10-21 19:53:37,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 19:53:37,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:53:37,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 19:53:37,545 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:53:37,545 INFO L87 Difference]: Start difference. First operand 76 states and 101 transitions. Second operand has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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) [2021-10-21 19:53:37,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:53:37,636 INFO L93 Difference]: Finished difference Result 199 states and 267 transitions. [2021-10-21 19:53:37,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:53:37,637 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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 21 [2021-10-21 19:53:37,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:53:37,639 INFO L225 Difference]: With dead ends: 199 [2021-10-21 19:53:37,639 INFO L226 Difference]: Without dead ends: 127 [2021-10-21 19:53:37,640 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 59.3ms TimeCoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:53:37,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2021-10-21 19:53:37,655 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 88. [2021-10-21 19:53:37,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.3448275862068966) internal successors, (117), 87 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:53:37,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 117 transitions. [2021-10-21 19:53:37,666 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 117 transitions. Word has length 21 [2021-10-21 19:53:37,666 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:53:37,666 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 117 transitions. [2021-10-21 19:53:37,667 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.909090909090909) internal successors, (32), 10 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) [2021-10-21 19:53:37,667 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 117 transitions. [2021-10-21 19:53:37,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-10-21 19:53:37,668 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:53:37,668 INFO L512 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:53:37,693 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-21 19:53:37,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:53:37,894 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:53:37,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:53:37,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1399176113, now seen corresponding path program 2 times [2021-10-21 19:53:37,894 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:53:37,894 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66623240] [2021-10-21 19:53:37,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:53:37,895 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:53:37,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:53:37,972 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:53:37,973 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:53:37,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66623240] [2021-10-21 19:53:37,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66623240] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:53:37,973 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1432431335] [2021-10-21 19:53:37,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:53:37,973 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:53:37,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:53:37,974 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:53:37,984 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-21 19:53:38,042 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:53:38,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:53:38,044 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-21 19:53:38,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:53:38,238 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-10-21 19:53:38,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1432431335] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:53:38,241 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:53:38,241 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2021-10-21 19:53:38,241 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751627543] [2021-10-21 19:53:38,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-10-21 19:53:38,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:53:38,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-10-21 19:53:38,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=86, Unknown=0, NotChecked=0, Total=132 [2021-10-21 19:53:38,243 INFO L87 Difference]: Start difference. First operand 88 states and 117 transitions. Second operand has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-10-21 19:53:38,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:53:38,490 INFO L93 Difference]: Finished difference Result 291 states and 403 transitions. [2021-10-21 19:53:38,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-21 19:53:38,491 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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 24 [2021-10-21 19:53:38,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:53:38,497 INFO L225 Difference]: With dead ends: 291 [2021-10-21 19:53:38,497 INFO L226 Difference]: Without dead ends: 207 [2021-10-21 19:53:38,501 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 145.2ms TimeCoverageRelationStatistics Valid=156, Invalid=306, Unknown=0, NotChecked=0, Total=462 [2021-10-21 19:53:38,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2021-10-21 19:53:38,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 146. [2021-10-21 19:53:38,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 146 states, 145 states have (on average 1.3379310344827586) internal successors, (194), 145 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:53:38,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 194 transitions. [2021-10-21 19:53:38,538 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 194 transitions. Word has length 24 [2021-10-21 19:53:38,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:53:38,538 INFO L470 AbstractCegarLoop]: Abstraction has 146 states and 194 transitions. [2021-10-21 19:53:38,538 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 3.0) internal successors, (36), 11 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) [2021-10-21 19:53:38,538 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 194 transitions. [2021-10-21 19:53:38,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-21 19:53:38,539 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:53:38,540 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:53:38,567 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-21 19:53:38,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:53:38,756 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:53:38,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:53:38,757 INFO L82 PathProgramCache]: Analyzing trace with hash -2084547665, now seen corresponding path program 3 times [2021-10-21 19:53:38,757 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:53:38,757 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754055602] [2021-10-21 19:53:38,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:53:38,757 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:53:38,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:53:38,838 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:53:38,839 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:53:38,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754055602] [2021-10-21 19:53:38,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754055602] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:53:38,839 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [78442078] [2021-10-21 19:53:38,839 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:53:38,839 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:53:38,839 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:53:38,840 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:53:38,863 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-21 19:53:38,945 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-21 19:53:38,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:53:38,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 3 conjunts are in the unsatisfiable core [2021-10-21 19:53:38,949 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:53:39,040 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 26 trivial. 0 not checked. [2021-10-21 19:53:39,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [78442078] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:53:39,041 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:53:39,041 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8] total 11 [2021-10-21 19:53:39,041 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1053197225] [2021-10-21 19:53:39,041 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-10-21 19:53:39,042 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:53:39,043 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-10-21 19:53:39,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:53:39,044 INFO L87 Difference]: Start difference. First operand 146 states and 194 transitions. Second operand has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2021-10-21 19:53:39,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:53:39,114 INFO L93 Difference]: Finished difference Result 334 states and 446 transitions. [2021-10-21 19:53:39,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-10-21 19:53:39,115 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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 27 [2021-10-21 19:53:39,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:53:39,117 INFO L225 Difference]: With dead ends: 334 [2021-10-21 19:53:39,117 INFO L226 Difference]: Without dead ends: 192 [2021-10-21 19:53:39,119 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 49.9ms TimeCoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:53:39,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2021-10-21 19:53:39,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 164. [2021-10-21 19:53:39,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.2392638036809815) internal successors, (202), 163 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:53:39,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 202 transitions. [2021-10-21 19:53:39,142 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 202 transitions. Word has length 27 [2021-10-21 19:53:39,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:53:39,142 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 202 transitions. [2021-10-21 19:53:39,142 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.5) internal successors, (18), 4 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) [2021-10-21 19:53:39,142 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 202 transitions. [2021-10-21 19:53:39,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-10-21 19:53:39,143 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:53:39,143 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:53:39,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-21 19:53:39,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2021-10-21 19:53:39,344 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:53:39,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:53:39,345 INFO L82 PathProgramCache]: Analyzing trace with hash 1868779761, now seen corresponding path program 1 times [2021-10-21 19:53:39,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:53:39,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462340778] [2021-10-21 19:53:39,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:53:39,345 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:53:39,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:53:39,408 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 35 trivial. 0 not checked. [2021-10-21 19:53:39,408 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:53:39,408 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462340778] [2021-10-21 19:53:39,408 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462340778] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:53:39,408 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:53:39,409 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:53:39,409 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [970237504] [2021-10-21 19:53:39,409 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:53:39,409 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:53:39,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:53:39,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:53:39,410 INFO L87 Difference]: Start difference. First operand 164 states and 202 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2021-10-21 19:53:39,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:53:39,440 INFO L93 Difference]: Finished difference Result 336 states and 416 transitions. [2021-10-21 19:53:39,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:53:39,441 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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 27 [2021-10-21 19:53:39,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:53:39,442 INFO L225 Difference]: With dead ends: 336 [2021-10-21 19:53:39,443 INFO L226 Difference]: Without dead ends: 176 [2021-10-21 19:53:39,443 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.8ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:53:39,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2021-10-21 19:53:39,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 162. [2021-10-21 19:53:39,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.2173913043478262) internal successors, (196), 161 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:53:39,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 196 transitions. [2021-10-21 19:53:39,457 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 196 transitions. Word has length 27 [2021-10-21 19:53:39,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:53:39,458 INFO L470 AbstractCegarLoop]: Abstraction has 162 states and 196 transitions. [2021-10-21 19:53:39,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 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) [2021-10-21 19:53:39,458 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 196 transitions. [2021-10-21 19:53:39,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-10-21 19:53:39,459 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:53:39,460 INFO L512 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:53:39,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2021-10-21 19:53:39,460 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:53:39,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:53:39,460 INFO L82 PathProgramCache]: Analyzing trace with hash 1325275563, now seen corresponding path program 1 times [2021-10-21 19:53:39,461 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:53:39,461 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801103615] [2021-10-21 19:53:39,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:53:39,461 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:53:39,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:53:39,545 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:53:39,545 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:53:39,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801103615] [2021-10-21 19:53:39,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801103615] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:53:39,546 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749255608] [2021-10-21 19:53:39,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:53:39,546 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:53:39,546 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:53:39,548 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:53:39,571 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-21 19:53:39,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:53:39,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 8 conjunts are in the unsatisfiable core [2021-10-21 19:53:39,646 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:53:39,871 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:53:39,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749255608] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:53:39,872 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:53:39,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-21 19:53:39,875 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520183898] [2021-10-21 19:53:39,876 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-21 19:53:39,876 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:53:39,876 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-21 19:53:39,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:53:39,877 INFO L87 Difference]: Start difference. First operand 162 states and 196 transitions. Second operand has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 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) [2021-10-21 19:53:39,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:53:39,957 INFO L93 Difference]: Finished difference Result 449 states and 539 transitions. [2021-10-21 19:53:39,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 19:53:39,958 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 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 28 [2021-10-21 19:53:39,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:53:39,960 INFO L225 Difference]: With dead ends: 449 [2021-10-21 19:53:39,960 INFO L226 Difference]: Without dead ends: 291 [2021-10-21 19:53:39,961 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 80.6ms TimeCoverageRelationStatistics Valid=90, Invalid=120, Unknown=0, NotChecked=0, Total=210 [2021-10-21 19:53:39,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2021-10-21 19:53:39,976 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 192. [2021-10-21 19:53:39,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 1.2041884816753927) internal successors, (230), 191 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:53:39,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 230 transitions. [2021-10-21 19:53:39,978 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 230 transitions. Word has length 28 [2021-10-21 19:53:39,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:53:39,979 INFO L470 AbstractCegarLoop]: Abstraction has 192 states and 230 transitions. [2021-10-21 19:53:39,979 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 3.0) internal successors, (45), 14 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) [2021-10-21 19:53:39,979 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 230 transitions. [2021-10-21 19:53:39,980 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-10-21 19:53:39,981 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:53:39,981 INFO L512 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:53:40,018 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2021-10-21 19:53:40,196 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-21 19:53:40,196 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:53:40,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:53:40,197 INFO L82 PathProgramCache]: Analyzing trace with hash 399501479, now seen corresponding path program 2 times [2021-10-21 19:53:40,197 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:53:40,197 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946202747] [2021-10-21 19:53:40,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:53:40,197 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:53:40,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:53:40,279 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:53:40,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:53:40,279 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946202747] [2021-10-21 19:53:40,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946202747] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:53:40,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653773624] [2021-10-21 19:53:40,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:53:40,280 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:53:40,281 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:53:40,284 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:53:40,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-21 19:53:40,399 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:53:40,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:53:40,400 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-21 19:53:40,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:53:40,640 INFO L134 CoverageAnalysis]: Checked inductivity of 51 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:53:40,640 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653773624] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:53:40,640 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:53:40,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-21 19:53:40,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129241350] [2021-10-21 19:53:40,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-21 19:53:40,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:53:40,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-21 19:53:40,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-10-21 19:53:40,642 INFO L87 Difference]: Start difference. First operand 192 states and 230 transitions. Second operand has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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) [2021-10-21 19:53:40,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:53:40,743 INFO L93 Difference]: Finished difference Result 509 states and 607 transitions. [2021-10-21 19:53:40,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:53:40,744 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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 31 [2021-10-21 19:53:40,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:53:40,746 INFO L225 Difference]: With dead ends: 509 [2021-10-21 19:53:40,746 INFO L226 Difference]: Without dead ends: 321 [2021-10-21 19:53:40,747 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 99.3ms TimeCoverageRelationStatistics Valid=115, Invalid=157, Unknown=0, NotChecked=0, Total=272 [2021-10-21 19:53:40,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 321 states. [2021-10-21 19:53:40,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 321 to 222. [2021-10-21 19:53:40,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 1.1945701357466063) internal successors, (264), 221 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:53:40,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 264 transitions. [2021-10-21 19:53:40,773 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 264 transitions. Word has length 31 [2021-10-21 19:53:40,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:53:40,773 INFO L470 AbstractCegarLoop]: Abstraction has 222 states and 264 transitions. [2021-10-21 19:53:40,773 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.0) internal successors, (51), 16 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) [2021-10-21 19:53:40,774 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 264 transitions. [2021-10-21 19:53:40,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-21 19:53:40,775 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:53:40,775 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:53:40,816 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-21 19:53:40,988 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2021-10-21 19:53:40,988 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:53:40,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:53:40,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1351227349, now seen corresponding path program 3 times [2021-10-21 19:53:40,989 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:53:40,989 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282153539] [2021-10-21 19:53:40,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:53:40,989 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:53:41,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:53:41,087 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:53:41,087 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:53:41,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282153539] [2021-10-21 19:53:41,088 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [282153539] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:53:41,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582680421] [2021-10-21 19:53:41,088 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:53:41,089 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:53:41,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:53:41,090 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:53:41,114 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-21 19:53:41,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-21 19:53:41,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:53:41,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 19:53:41,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:53:41,371 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 13 proven. 0 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-10-21 19:53:41,372 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582680421] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:53:41,372 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:53:41,372 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 14 [2021-10-21 19:53:41,372 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700856811] [2021-10-21 19:53:41,373 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:53:41,373 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:53:41,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:53:41,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2021-10-21 19:53:41,375 INFO L87 Difference]: Start difference. First operand 222 states and 264 transitions. Second operand has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2021-10-21 19:53:41,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:53:41,452 INFO L93 Difference]: Finished difference Result 225 states and 266 transitions. [2021-10-21 19:53:41,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:53:41,452 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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 34 [2021-10-21 19:53:41,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:53:41,455 INFO L225 Difference]: With dead ends: 225 [2021-10-21 19:53:41,455 INFO L226 Difference]: Without dead ends: 165 [2021-10-21 19:53:41,456 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 109.2ms TimeCoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2021-10-21 19:53:41,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2021-10-21 19:53:41,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2021-10-21 19:53:41,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.2085889570552146) internal successors, (197), 163 states have internal predecessors, (197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:53:41,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 197 transitions. [2021-10-21 19:53:41,469 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 197 transitions. Word has length 34 [2021-10-21 19:53:41,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:53:41,470 INFO L470 AbstractCegarLoop]: Abstraction has 164 states and 197 transitions. [2021-10-21 19:53:41,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.6) internal successors, (18), 5 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) [2021-10-21 19:53:41,470 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 197 transitions. [2021-10-21 19:53:41,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2021-10-21 19:53:41,473 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:53:41,474 INFO L512 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:53:41,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-10-21 19:53:41,700 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-21 19:53:41,700 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:53:41,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:53:41,701 INFO L82 PathProgramCache]: Analyzing trace with hash -1860700439, now seen corresponding path program 1 times [2021-10-21 19:53:41,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:53:41,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190569599] [2021-10-21 19:53:41,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:53:41,701 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:53:41,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:53:41,791 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:53:41,791 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:53:41,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190569599] [2021-10-21 19:53:41,792 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190569599] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:53:41,792 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952323227] [2021-10-21 19:53:41,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:53:41,792 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:53:41,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:53:41,796 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:53:41,819 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-21 19:53:41,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:53:41,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-21 19:53:41,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:53:42,184 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 0 proven. 70 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:53:42,185 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1952323227] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:53:42,185 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:53:42,185 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-10-21 19:53:42,185 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713087455] [2021-10-21 19:53:42,186 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-21 19:53:42,186 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:53:42,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-21 19:53:42,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-10-21 19:53:42,187 INFO L87 Difference]: Start difference. First operand 164 states and 197 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 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) [2021-10-21 19:53:42,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:53:42,307 INFO L93 Difference]: Finished difference Result 443 states and 529 transitions. [2021-10-21 19:53:42,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 19:53:42,307 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 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 34 [2021-10-21 19:53:42,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:53:42,309 INFO L225 Difference]: With dead ends: 443 [2021-10-21 19:53:42,309 INFO L226 Difference]: Without dead ends: 283 [2021-10-21 19:53:42,310 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 127.1ms TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-10-21 19:53:42,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2021-10-21 19:53:42,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 188. [2021-10-21 19:53:42,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.2032085561497325) internal successors, (225), 187 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:53:42,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 225 transitions. [2021-10-21 19:53:42,326 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 225 transitions. Word has length 34 [2021-10-21 19:53:42,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:53:42,327 INFO L470 AbstractCegarLoop]: Abstraction has 188 states and 225 transitions. [2021-10-21 19:53:42,327 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 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) [2021-10-21 19:53:42,327 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 225 transitions. [2021-10-21 19:53:42,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-10-21 19:53:42,328 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:53:42,328 INFO L512 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:53:42,368 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-21 19:53:42,552 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-21 19:53:42,552 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:53:42,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:53:42,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1470700201, now seen corresponding path program 2 times [2021-10-21 19:53:42,552 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:53:42,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194824215] [2021-10-21 19:53:42,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:53:42,553 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:53:42,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:53:42,650 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:53:42,650 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:53:42,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194824215] [2021-10-21 19:53:42,650 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194824215] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:53:42,650 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2094159282] [2021-10-21 19:53:42,651 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:53:42,651 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:53:42,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:53:42,652 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:53:42,682 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-21 19:53:42,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:53:42,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:53:42,813 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-21 19:53:42,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:53:43,084 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 92 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:53:43,085 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2094159282] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:53:43,085 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:53:43,085 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-10-21 19:53:43,087 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340160772] [2021-10-21 19:53:43,087 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-21 19:53:43,088 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:53:43,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-21 19:53:43,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-10-21 19:53:43,089 INFO L87 Difference]: Start difference. First operand 188 states and 225 transitions. Second operand has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 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) [2021-10-21 19:53:43,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:53:43,209 INFO L93 Difference]: Finished difference Result 491 states and 585 transitions. [2021-10-21 19:53:43,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 19:53:43,209 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 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 37 [2021-10-21 19:53:43,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:53:43,212 INFO L225 Difference]: With dead ends: 491 [2021-10-21 19:53:43,212 INFO L226 Difference]: Without dead ends: 307 [2021-10-21 19:53:43,215 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 133.9ms TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-10-21 19:53:43,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2021-10-21 19:53:43,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 212. [2021-10-21 19:53:43,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.1990521327014219) internal successors, (253), 211 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:53:43,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 253 transitions. [2021-10-21 19:53:43,233 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 253 transitions. Word has length 37 [2021-10-21 19:53:43,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:53:43,235 INFO L470 AbstractCegarLoop]: Abstraction has 212 states and 253 transitions. [2021-10-21 19:53:43,236 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 3.0) internal successors, (63), 20 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) [2021-10-21 19:53:43,236 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 253 transitions. [2021-10-21 19:53:43,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-21 19:53:43,237 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:53:43,238 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:53:43,272 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-21 19:53:43,452 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-21 19:53:43,452 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:53:43,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:53:43,453 INFO L82 PathProgramCache]: Analyzing trace with hash -877109527, now seen corresponding path program 3 times [2021-10-21 19:53:43,453 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:53:43,453 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385773906] [2021-10-21 19:53:43,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:53:43,453 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:53:43,485 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:53:43,583 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:53:43,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:53:43,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385773906] [2021-10-21 19:53:43,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385773906] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:53:43,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569446120] [2021-10-21 19:53:43,585 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:53:43,585 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:53:43,585 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:53:43,586 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:53:43,605 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-21 19:53:43,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-21 19:53:43,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:53:43,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-21 19:53:43,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:53:44,150 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 25 proven. 0 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-10-21 19:53:44,151 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [569446120] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:53:44,151 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:53:44,151 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [12] total 19 [2021-10-21 19:53:44,151 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345797861] [2021-10-21 19:53:44,152 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:53:44,152 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:53:44,152 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:53:44,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=256, Unknown=0, NotChecked=0, Total=342 [2021-10-21 19:53:44,153 INFO L87 Difference]: Start difference. First operand 212 states and 253 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 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) [2021-10-21 19:53:44,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:53:44,272 INFO L93 Difference]: Finished difference Result 486 states and 576 transitions. [2021-10-21 19:53:44,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-21 19:53:44,273 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 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 40 [2021-10-21 19:53:44,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:53:44,276 INFO L225 Difference]: With dead ends: 486 [2021-10-21 19:53:44,276 INFO L226 Difference]: Without dead ends: 484 [2021-10-21 19:53:44,277 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 141.2ms TimeCoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2021-10-21 19:53:44,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-10-21 19:53:44,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 300. [2021-10-21 19:53:44,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 300 states, 299 states have (on average 1.1872909698996656) internal successors, (355), 299 states have internal predecessors, (355), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:53:44,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 300 states to 300 states and 355 transitions. [2021-10-21 19:53:44,319 INFO L78 Accepts]: Start accepts. Automaton has 300 states and 355 transitions. Word has length 40 [2021-10-21 19:53:44,319 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:53:44,319 INFO L470 AbstractCegarLoop]: Abstraction has 300 states and 355 transitions. [2021-10-21 19:53:44,319 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 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) [2021-10-21 19:53:44,319 INFO L276 IsEmpty]: Start isEmpty. Operand 300 states and 355 transitions. [2021-10-21 19:53:44,320 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-21 19:53:44,320 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:53:44,320 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:53:44,356 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-21 19:53:44,544 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-10-21 19:53:44,544 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:53:44,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:53:44,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1952423639, now seen corresponding path program 1 times [2021-10-21 19:53:44,544 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:53:44,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944805877] [2021-10-21 19:53:44,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:53:44,545 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:53:44,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:53:44,581 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 17 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-10-21 19:53:44,581 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:53:44,581 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944805877] [2021-10-21 19:53:44,581 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944805877] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:53:44,582 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:53:44,582 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-10-21 19:53:44,582 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322472002] [2021-10-21 19:53:44,582 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-21 19:53:44,583 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:53:44,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-21 19:53:44,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:53:44,584 INFO L87 Difference]: Start difference. First operand 300 states and 355 transitions. Second operand has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:53:44,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:53:44,615 INFO L93 Difference]: Finished difference Result 427 states and 509 transitions. [2021-10-21 19:53:44,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-21 19:53:44,615 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-10-21 19:53:44,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:53:44,617 INFO L225 Difference]: With dead ends: 427 [2021-10-21 19:53:44,617 INFO L226 Difference]: Without dead ends: 319 [2021-10-21 19:53:44,618 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.6ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-21 19:53:44,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-10-21 19:53:44,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 306. [2021-10-21 19:53:44,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 306 states, 305 states have (on average 1.1836065573770491) internal successors, (361), 305 states have internal predecessors, (361), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:53:44,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 306 states to 306 states and 361 transitions. [2021-10-21 19:53:44,646 INFO L78 Accepts]: Start accepts. Automaton has 306 states and 361 transitions. Word has length 40 [2021-10-21 19:53:44,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:53:44,646 INFO L470 AbstractCegarLoop]: Abstraction has 306 states and 361 transitions. [2021-10-21 19:53:44,647 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 6.333333333333333) internal successors, (19), 3 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:53:44,647 INFO L276 IsEmpty]: Start isEmpty. Operand 306 states and 361 transitions. [2021-10-21 19:53:44,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-10-21 19:53:44,647 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:53:44,648 INFO L512 BasicCegarLoop]: trace histogram [9, 9, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:53:44,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2021-10-21 19:53:44,648 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:53:44,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:53:44,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1950517015, now seen corresponding path program 1 times [2021-10-21 19:53:44,652 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:53:44,652 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1745103837] [2021-10-21 19:53:44,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:53:44,653 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:53:44,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:53:44,768 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:53:44,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:53:44,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1745103837] [2021-10-21 19:53:44,769 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1745103837] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:53:44,769 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1356257223] [2021-10-21 19:53:44,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:53:44,770 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:53:44,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:53:44,771 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:53:44,796 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-21 19:53:45,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:53:45,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-21 19:53:45,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:53:45,296 INFO L134 CoverageAnalysis]: Checked inductivity of 117 backedges. 0 proven. 117 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:53:45,296 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1356257223] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:53:45,297 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:53:45,297 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-10-21 19:53:45,297 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507441129] [2021-10-21 19:53:45,297 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-21 19:53:45,298 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:53:45,300 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-21 19:53:45,300 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=298, Unknown=0, NotChecked=0, Total=506 [2021-10-21 19:53:45,301 INFO L87 Difference]: Start difference. First operand 306 states and 361 transitions. Second operand has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 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) [2021-10-21 19:53:45,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:53:45,438 INFO L93 Difference]: Finished difference Result 669 states and 793 transitions. [2021-10-21 19:53:45,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-21 19:53:45,439 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 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 40 [2021-10-21 19:53:45,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:53:45,441 INFO L225 Difference]: With dead ends: 669 [2021-10-21 19:53:45,441 INFO L226 Difference]: Without dead ends: 439 [2021-10-21 19:53:45,442 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 152.6ms TimeCoverageRelationStatistics Valid=208, Invalid=298, Unknown=0, NotChecked=0, Total=506 [2021-10-21 19:53:45,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-10-21 19:53:45,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 339. [2021-10-21 19:53:45,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 339 states, 338 states have (on average 1.180473372781065) internal successors, (399), 338 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:53:45,469 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 339 states to 339 states and 399 transitions. [2021-10-21 19:53:45,470 INFO L78 Accepts]: Start accepts. Automaton has 339 states and 399 transitions. Word has length 40 [2021-10-21 19:53:45,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:53:45,470 INFO L470 AbstractCegarLoop]: Abstraction has 339 states and 399 transitions. [2021-10-21 19:53:45,470 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 3.0) internal successors, (69), 22 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) [2021-10-21 19:53:45,470 INFO L276 IsEmpty]: Start isEmpty. Operand 339 states and 399 transitions. [2021-10-21 19:53:45,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-10-21 19:53:45,471 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:53:45,471 INFO L512 BasicCegarLoop]: trace histogram [10, 10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:53:45,511 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-21 19:53:45,692 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-21 19:53:45,692 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:53:45,692 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:53:45,692 INFO L82 PathProgramCache]: Analyzing trace with hash -658324379, now seen corresponding path program 2 times [2021-10-21 19:53:45,693 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:53:45,693 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937131116] [2021-10-21 19:53:45,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:53:45,693 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:53:45,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:53:45,834 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 145 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:53:45,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:53:45,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937131116] [2021-10-21 19:53:45,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937131116] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:53:45,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669245070] [2021-10-21 19:53:45,835 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:53:45,835 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:53:45,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:53:45,836 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:53:45,839 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-21 19:53:46,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:53:46,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:53:46,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 19:53:46,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:53:46,358 INFO L134 CoverageAnalysis]: Checked inductivity of 145 backedges. 0 proven. 68 refuted. 0 times theorem prover too weak. 77 trivial. 0 not checked. [2021-10-21 19:53:46,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1669245070] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:53:46,359 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:53:46,359 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 18 [2021-10-21 19:53:46,359 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1106619026] [2021-10-21 19:53:46,360 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-21 19:53:46,361 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:53:46,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-21 19:53:46,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=212, Unknown=0, NotChecked=0, Total=342 [2021-10-21 19:53:46,362 INFO L87 Difference]: Start difference. First operand 339 states and 399 transitions. Second operand has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 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) [2021-10-21 19:53:46,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:53:46,820 INFO L93 Difference]: Finished difference Result 1075 states and 1251 transitions. [2021-10-21 19:53:46,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-10-21 19:53:46,820 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 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 43 [2021-10-21 19:53:46,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:53:46,825 INFO L225 Difference]: With dead ends: 1075 [2021-10-21 19:53:46,825 INFO L226 Difference]: Without dead ends: 821 [2021-10-21 19:53:46,827 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 38 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 362.2ms TimeCoverageRelationStatistics Valid=486, Invalid=996, Unknown=0, NotChecked=0, Total=1482 [2021-10-21 19:53:46,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 821 states. [2021-10-21 19:53:46,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 821 to 333. [2021-10-21 19:53:46,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 1.1686746987951808) internal successors, (388), 332 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:53:46,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 388 transitions. [2021-10-21 19:53:46,861 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 388 transitions. Word has length 43 [2021-10-21 19:53:46,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:53:46,862 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 388 transitions. [2021-10-21 19:53:46,862 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 3.0) internal successors, (57), 18 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) [2021-10-21 19:53:46,862 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 388 transitions. [2021-10-21 19:53:46,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-21 19:53:46,863 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:53:46,863 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 8, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:53:46,889 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-21 19:53:47,076 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:53:47,076 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:53:47,076 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:53:47,076 INFO L82 PathProgramCache]: Analyzing trace with hash 1311604647, now seen corresponding path program 3 times [2021-10-21 19:53:47,077 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:53:47,077 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148192503] [2021-10-21 19:53:47,077 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:53:47,077 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:53:47,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:53:47,223 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:53:47,223 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:53:47,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148192503] [2021-10-21 19:53:47,223 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148192503] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:53:47,223 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296279499] [2021-10-21 19:53:47,224 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:53:47,224 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:53:47,224 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:53:47,225 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:53:47,227 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-21 19:53:47,466 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-21 19:53:47,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:53:47,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-21 19:53:47,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:53:47,948 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 31 proven. 0 refuted. 0 times theorem prover too weak. 145 trivial. 0 not checked. [2021-10-21 19:53:47,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [296279499] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:53:47,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-10-21 19:53:47,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [14] total 21 [2021-10-21 19:53:47,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [498370377] [2021-10-21 19:53:47,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2021-10-21 19:53:47,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:53:47,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-10-21 19:53:47,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2021-10-21 19:53:47,951 INFO L87 Difference]: Start difference. First operand 333 states and 388 transitions. Second operand has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 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) [2021-10-21 19:53:48,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:53:48,116 INFO L93 Difference]: Finished difference Result 442 states and 513 transitions. [2021-10-21 19:53:48,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-21 19:53:48,117 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 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 46 [2021-10-21 19:53:48,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:53:48,120 INFO L225 Difference]: With dead ends: 442 [2021-10-21 19:53:48,120 INFO L226 Difference]: Without dead ends: 440 [2021-10-21 19:53:48,121 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 209.0ms TimeCoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2021-10-21 19:53:48,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 440 states. [2021-10-21 19:53:48,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 440 to 333. [2021-10-21 19:53:48,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 333 states, 332 states have (on average 1.1686746987951808) internal successors, (388), 332 states have internal predecessors, (388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:53:48,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 333 states to 333 states and 388 transitions. [2021-10-21 19:53:48,151 INFO L78 Accepts]: Start accepts. Automaton has 333 states and 388 transitions. Word has length 46 [2021-10-21 19:53:48,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:53:48,151 INFO L470 AbstractCegarLoop]: Abstraction has 333 states and 388 transitions. [2021-10-21 19:53:48,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.5) internal successors, (20), 8 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) [2021-10-21 19:53:48,151 INFO L276 IsEmpty]: Start isEmpty. Operand 333 states and 388 transitions. [2021-10-21 19:53:48,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-10-21 19:53:48,152 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:53:48,152 INFO L512 BasicCegarLoop]: trace histogram [11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:53:48,188 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-21 19:53:48,380 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:53:48,380 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:53:48,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:53:48,380 INFO L82 PathProgramCache]: Analyzing trace with hash -53609623, now seen corresponding path program 1 times [2021-10-21 19:53:48,380 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:53:48,381 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799374900] [2021-10-21 19:53:48,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:53:48,381 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:53:48,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:53:48,454 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 176 trivial. 0 not checked. [2021-10-21 19:53:48,454 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:53:48,454 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799374900] [2021-10-21 19:53:48,455 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799374900] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:53:48,455 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:53:48,455 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-10-21 19:53:48,455 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633616180] [2021-10-21 19:53:48,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:53:48,458 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:53:48,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:53:48,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:53:48,459 INFO L87 Difference]: Start difference. First operand 333 states and 388 transitions. Second operand has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 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) [2021-10-21 19:53:48,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:53:48,521 INFO L93 Difference]: Finished difference Result 561 states and 655 transitions. [2021-10-21 19:53:48,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:53:48,521 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 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 46 [2021-10-21 19:53:48,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:53:48,524 INFO L225 Difference]: With dead ends: 561 [2021-10-21 19:53:48,524 INFO L226 Difference]: Without dead ends: 448 [2021-10-21 19:53:48,525 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 12.5ms TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2021-10-21 19:53:48,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 448 states. [2021-10-21 19:53:48,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 448 to 400. [2021-10-21 19:53:48,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 400 states, 399 states have (on average 1.1754385964912282) internal successors, (469), 399 states have internal predecessors, (469), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:53:48,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 400 states to 400 states and 469 transitions. [2021-10-21 19:53:48,564 INFO L78 Accepts]: Start accepts. Automaton has 400 states and 469 transitions. Word has length 46 [2021-10-21 19:53:48,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:53:48,564 INFO L470 AbstractCegarLoop]: Abstraction has 400 states and 469 transitions. [2021-10-21 19:53:48,564 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.2) internal successors, (16), 4 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) [2021-10-21 19:53:48,564 INFO L276 IsEmpty]: Start isEmpty. Operand 400 states and 469 transitions. [2021-10-21 19:53:48,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2021-10-21 19:53:48,565 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:53:48,566 INFO L512 BasicCegarLoop]: trace histogram [22, 22, 20, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:53:48,566 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2021-10-21 19:53:48,566 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:53:48,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:53:48,567 INFO L82 PathProgramCache]: Analyzing trace with hash 1284068705, now seen corresponding path program 1 times [2021-10-21 19:53:48,567 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:53:48,567 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263151448] [2021-10-21 19:53:48,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:53:48,567 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:53:48,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:53:48,731 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 387 proven. 176 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-10-21 19:53:48,731 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:53:48,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263151448] [2021-10-21 19:53:48,731 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263151448] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:53:48,731 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1865708165] [2021-10-21 19:53:48,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:53:48,732 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:53:48,732 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:53:48,733 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:53:48,753 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-21 19:53:49,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:53:49,021 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 14 conjunts are in the unsatisfiable core [2021-10-21 19:53:49,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:53:49,532 INFO L134 CoverageAnalysis]: Checked inductivity of 745 backedges. 387 proven. 176 refuted. 0 times theorem prover too weak. 182 trivial. 0 not checked. [2021-10-21 19:53:49,533 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1865708165] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:53:49,533 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:53:49,533 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 26 [2021-10-21 19:53:49,533 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905644242] [2021-10-21 19:53:49,534 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-10-21 19:53:49,534 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:53:49,534 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-10-21 19:53:49,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=285, Invalid=417, Unknown=0, NotChecked=0, Total=702 [2021-10-21 19:53:49,535 INFO L87 Difference]: Start difference. First operand 400 states and 469 transitions. Second operand has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 26 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) [2021-10-21 19:53:49,801 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:53:49,802 INFO L93 Difference]: Finished difference Result 1102 states and 1266 transitions. [2021-10-21 19:53:49,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-21 19:53:49,803 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 26 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 87 [2021-10-21 19:53:49,803 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:53:49,808 INFO L225 Difference]: With dead ends: 1102 [2021-10-21 19:53:49,808 INFO L226 Difference]: Without dead ends: 793 [2021-10-21 19:53:49,810 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 100 GetRequests, 75 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 214.8ms TimeCoverageRelationStatistics Valid=285, Invalid=417, Unknown=0, NotChecked=0, Total=702 [2021-10-21 19:53:49,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 793 states. [2021-10-21 19:53:49,862 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 793 to 439. [2021-10-21 19:53:49,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 439 states, 438 states have (on average 1.17351598173516) internal successors, (514), 438 states have internal predecessors, (514), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:53:49,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 439 states to 439 states and 514 transitions. [2021-10-21 19:53:49,865 INFO L78 Accepts]: Start accepts. Automaton has 439 states and 514 transitions. Word has length 87 [2021-10-21 19:53:49,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:53:49,866 INFO L470 AbstractCegarLoop]: Abstraction has 439 states and 514 transitions. [2021-10-21 19:53:49,866 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 3.259259259259259) internal successors, (88), 26 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) [2021-10-21 19:53:49,866 INFO L276 IsEmpty]: Start isEmpty. Operand 439 states and 514 transitions. [2021-10-21 19:53:49,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2021-10-21 19:53:49,873 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:53:49,873 INFO L512 BasicCegarLoop]: trace histogram [24, 24, 22, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:53:49,910 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-21 19:53:50,088 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:53:50,088 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:53:50,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:53:50,089 INFO L82 PathProgramCache]: Analyzing trace with hash -1856213775, now seen corresponding path program 2 times [2021-10-21 19:53:50,089 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:53:50,089 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32663176] [2021-10-21 19:53:50,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:53:50,089 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:53:50,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:53:50,256 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 458 proven. 210 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2021-10-21 19:53:50,256 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:53:50,256 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32663176] [2021-10-21 19:53:50,256 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32663176] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:53:50,257 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503126555] [2021-10-21 19:53:50,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:53:50,257 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:53:50,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:53:50,260 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:53:50,284 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-21 19:53:50,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:53:50,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:53:50,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 232 conjuncts, 15 conjunts are in the unsatisfiable core [2021-10-21 19:53:50,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:53:51,090 INFO L134 CoverageAnalysis]: Checked inductivity of 884 backedges. 458 proven. 210 refuted. 0 times theorem prover too weak. 216 trivial. 0 not checked. [2021-10-21 19:53:51,090 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503126555] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:53:51,090 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:53:51,090 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 28 [2021-10-21 19:53:51,091 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1688010972] [2021-10-21 19:53:51,091 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-10-21 19:53:51,091 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:53:51,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-10-21 19:53:51,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=328, Invalid=484, Unknown=0, NotChecked=0, Total=812 [2021-10-21 19:53:51,093 INFO L87 Difference]: Start difference. First operand 439 states and 514 transitions. Second operand has 29 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 28 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) [2021-10-21 19:53:51,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:53:51,374 INFO L93 Difference]: Finished difference Result 1171 states and 1346 transitions. [2021-10-21 19:53:51,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-21 19:53:51,374 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 28 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 93 [2021-10-21 19:53:51,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:53:51,379 INFO L225 Difference]: With dead ends: 1171 [2021-10-21 19:53:51,379 INFO L226 Difference]: Without dead ends: 832 [2021-10-21 19:53:51,380 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 247.7ms TimeCoverageRelationStatistics Valid=328, Invalid=484, Unknown=0, NotChecked=0, Total=812 [2021-10-21 19:53:51,381 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2021-10-21 19:53:51,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 478. [2021-10-21 19:53:51,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 478 states, 477 states have (on average 1.1719077568134173) internal successors, (559), 477 states have internal predecessors, (559), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:53:51,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 478 states to 478 states and 559 transitions. [2021-10-21 19:53:51,438 INFO L78 Accepts]: Start accepts. Automaton has 478 states and 559 transitions. Word has length 93 [2021-10-21 19:53:51,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:53:51,439 INFO L470 AbstractCegarLoop]: Abstraction has 478 states and 559 transitions. [2021-10-21 19:53:51,439 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 3.2413793103448274) internal successors, (94), 28 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) [2021-10-21 19:53:51,439 INFO L276 IsEmpty]: Start isEmpty. Operand 478 states and 559 transitions. [2021-10-21 19:53:51,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2021-10-21 19:53:51,441 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:53:51,441 INFO L512 BasicCegarLoop]: trace histogram [26, 26, 24, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:53:51,479 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-10-21 19:53:51,664 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:53:51,664 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:53:51,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:53:51,664 INFO L82 PathProgramCache]: Analyzing trace with hash -267019423, now seen corresponding path program 3 times [2021-10-21 19:53:51,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:53:51,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778617662] [2021-10-21 19:53:51,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:53:51,665 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:53:51,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:53:51,849 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 535 proven. 247 refuted. 0 times theorem prover too weak. 253 trivial. 0 not checked. [2021-10-21 19:53:51,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:53:51,849 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778617662] [2021-10-21 19:53:51,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778617662] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:53:51,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612975380] [2021-10-21 19:53:51,850 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:53:51,850 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:53:51,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:53:51,851 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:53:51,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-21 19:53:52,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-21 19:53:52,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:53:52,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-21 19:53:52,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:53:52,994 INFO L134 CoverageAnalysis]: Checked inductivity of 1035 backedges. 37 proven. 541 refuted. 0 times theorem prover too weak. 457 trivial. 0 not checked. [2021-10-21 19:53:52,995 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [612975380] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:53:52,995 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:53:52,995 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 9] total 24 [2021-10-21 19:53:52,995 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1504026263] [2021-10-21 19:53:52,996 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-10-21 19:53:52,996 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:53:52,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-10-21 19:53:52,997 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=142, Invalid=410, Unknown=0, NotChecked=0, Total=552 [2021-10-21 19:53:52,997 INFO L87 Difference]: Start difference. First operand 478 states and 559 transitions. Second operand has 24 states, 24 states have (on average 3.75) internal successors, (90), 24 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) [2021-10-21 19:53:54,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:53:54,974 INFO L93 Difference]: Finished difference Result 2208 states and 2540 transitions. [2021-10-21 19:53:54,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2021-10-21 19:53:54,975 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 3.75) internal successors, (90), 24 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 99 [2021-10-21 19:53:54,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:53:54,984 INFO L225 Difference]: With dead ends: 2208 [2021-10-21 19:53:54,984 INFO L226 Difference]: Without dead ends: 1839 [2021-10-21 19:53:54,988 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 177 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 85 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2190 ImplicationChecksByTransitivity, 1328.0ms TimeCoverageRelationStatistics Valid=1574, Invalid=5908, Unknown=0, NotChecked=0, Total=7482 [2021-10-21 19:53:54,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1839 states. [2021-10-21 19:53:55,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1839 to 770. [2021-10-21 19:53:55,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 770 states, 769 states have (on average 1.1716514954486346) internal successors, (901), 769 states have internal predecessors, (901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:53:55,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 770 states to 770 states and 901 transitions. [2021-10-21 19:53:55,096 INFO L78 Accepts]: Start accepts. Automaton has 770 states and 901 transitions. Word has length 99 [2021-10-21 19:53:55,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:53:55,096 INFO L470 AbstractCegarLoop]: Abstraction has 770 states and 901 transitions. [2021-10-21 19:53:55,097 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 3.75) internal successors, (90), 24 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) [2021-10-21 19:53:55,097 INFO L276 IsEmpty]: Start isEmpty. Operand 770 states and 901 transitions. [2021-10-21 19:53:55,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2021-10-21 19:53:55,099 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:53:55,099 INFO L512 BasicCegarLoop]: trace histogram [28, 28, 24, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:53:55,137 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-21 19:53:55,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-10-21 19:53:55,316 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:53:55,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:53:55,317 INFO L82 PathProgramCache]: Analyzing trace with hash -111346257, now seen corresponding path program 1 times [2021-10-21 19:53:55,317 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:53:55,317 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [358930424] [2021-10-21 19:53:55,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:53:55,317 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:53:55,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:53:55,541 INFO L134 CoverageAnalysis]: Checked inductivity of 1198 backedges. 49 proven. 861 refuted. 0 times theorem prover too weak. 288 trivial. 0 not checked. [2021-10-21 19:53:55,541 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:53:55,541 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [358930424] [2021-10-21 19:53:55,542 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [358930424] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:53:55,542 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683545798] [2021-10-21 19:53:55,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:53:55,542 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:53:55,542 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:53:55,543 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:53:55,549 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-21 19:53:55,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:53:55,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 255 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-21 19:53:55,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:53:56,540 INFO L134 CoverageAnalysis]: Checked inductivity of 1198 backedges. 618 proven. 287 refuted. 0 times theorem prover too weak. 293 trivial. 0 not checked. [2021-10-21 19:53:56,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683545798] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:53:56,540 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:53:56,541 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-10-21 19:53:56,542 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320076146] [2021-10-21 19:53:56,542 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-21 19:53:56,542 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:53:56,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-21 19:53:56,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=633, Unknown=0, NotChecked=0, Total=1056 [2021-10-21 19:53:56,544 INFO L87 Difference]: Start difference. First operand 770 states and 901 transitions. Second operand has 33 states, 33 states have (on average 3.606060606060606) internal successors, (119), 32 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:53:56,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:53:56,998 INFO L93 Difference]: Finished difference Result 1968 states and 2264 transitions. [2021-10-21 19:53:56,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-21 19:53:56,998 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.606060606060606) internal successors, (119), 32 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 105 [2021-10-21 19:53:56,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:53:57,005 INFO L225 Difference]: With dead ends: 1968 [2021-10-21 19:53:57,005 INFO L226 Difference]: Without dead ends: 1316 [2021-10-21 19:53:57,007 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 121 GetRequests, 90 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 303.0ms TimeCoverageRelationStatistics Valid=423, Invalid=633, Unknown=0, NotChecked=0, Total=1056 [2021-10-21 19:53:57,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1316 states. [2021-10-21 19:53:57,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1316 to 809. [2021-10-21 19:53:57,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 808 states have (on average 1.1707920792079207) internal successors, (946), 808 states have internal predecessors, (946), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:53:57,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 946 transitions. [2021-10-21 19:53:57,122 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 946 transitions. Word has length 105 [2021-10-21 19:53:57,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:53:57,123 INFO L470 AbstractCegarLoop]: Abstraction has 809 states and 946 transitions. [2021-10-21 19:53:57,123 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.606060606060606) internal successors, (119), 32 states have internal predecessors, (119), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:53:57,123 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 946 transitions. [2021-10-21 19:53:57,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2021-10-21 19:53:57,125 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:53:57,126 INFO L512 BasicCegarLoop]: trace histogram [30, 30, 26, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:53:57,152 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-21 19:53:57,336 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:53:57,336 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:53:57,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:53:57,336 INFO L82 PathProgramCache]: Analyzing trace with hash 802849635, now seen corresponding path program 2 times [2021-10-21 19:53:57,337 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:53:57,337 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119071879] [2021-10-21 19:53:57,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:53:57,337 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:53:57,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:53:57,584 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 52 proven. 990 refuted. 0 times theorem prover too weak. 331 trivial. 0 not checked. [2021-10-21 19:53:57,584 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:53:57,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119071879] [2021-10-21 19:53:57,584 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119071879] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:53:57,584 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [119726903] [2021-10-21 19:53:57,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:53:57,584 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:53:57,584 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:53:57,586 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:53:57,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-21 19:53:58,006 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:53:58,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:53:58,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-21 19:53:58,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:53:58,569 INFO L134 CoverageAnalysis]: Checked inductivity of 1373 backedges. 707 proven. 330 refuted. 0 times theorem prover too weak. 336 trivial. 0 not checked. [2021-10-21 19:53:58,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [119726903] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:53:58,569 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:53:58,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-10-21 19:53:58,570 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71707723] [2021-10-21 19:53:58,570 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-21 19:53:58,570 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:53:58,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-21 19:53:58,572 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=475, Invalid=715, Unknown=0, NotChecked=0, Total=1190 [2021-10-21 19:53:58,572 INFO L87 Difference]: Start difference. First operand 809 states and 946 transitions. Second operand has 35 states, 35 states have (on average 3.5714285714285716) internal successors, (125), 34 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:53:58,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:53:58,962 INFO L93 Difference]: Finished difference Result 2078 states and 2393 transitions. [2021-10-21 19:53:58,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-21 19:53:58,962 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 3.5714285714285716) internal successors, (125), 34 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 111 [2021-10-21 19:53:58,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:53:58,969 INFO L225 Difference]: With dead ends: 2078 [2021-10-21 19:53:58,969 INFO L226 Difference]: Without dead ends: 1396 [2021-10-21 19:53:58,971 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 95 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 308.5ms TimeCoverageRelationStatistics Valid=475, Invalid=715, Unknown=0, NotChecked=0, Total=1190 [2021-10-21 19:53:58,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1396 states. [2021-10-21 19:53:59,098 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1396 to 866. [2021-10-21 19:53:59,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 866 states, 865 states have (on average 1.169942196531792) internal successors, (1012), 865 states have internal predecessors, (1012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:53:59,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 866 states to 866 states and 1012 transitions. [2021-10-21 19:53:59,102 INFO L78 Accepts]: Start accepts. Automaton has 866 states and 1012 transitions. Word has length 111 [2021-10-21 19:53:59,102 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:53:59,102 INFO L470 AbstractCegarLoop]: Abstraction has 866 states and 1012 transitions. [2021-10-21 19:53:59,102 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 3.5714285714285716) internal successors, (125), 34 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:53:59,103 INFO L276 IsEmpty]: Start isEmpty. Operand 866 states and 1012 transitions. [2021-10-21 19:53:59,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2021-10-21 19:53:59,105 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:53:59,105 INFO L512 BasicCegarLoop]: trace histogram [32, 32, 28, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:53:59,147 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-21 19:53:59,332 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:53:59,332 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:53:59,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:53:59,332 INFO L82 PathProgramCache]: Analyzing trace with hash -780287697, now seen corresponding path program 3 times [2021-10-21 19:53:59,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:53:59,333 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302384510] [2021-10-21 19:53:59,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:53:59,333 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:53:59,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:53:59,575 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 55 proven. 1128 refuted. 0 times theorem prover too weak. 377 trivial. 0 not checked. [2021-10-21 19:53:59,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:53:59,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302384510] [2021-10-21 19:53:59,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302384510] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:53:59,576 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [393235891] [2021-10-21 19:53:59,576 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:53:59,576 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:53:59,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:53:59,580 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:53:59,606 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-21 19:54:00,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-21 19:54:00,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:54:00,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 9 conjunts are in the unsatisfiable core [2021-10-21 19:54:00,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:54:00,516 INFO L134 CoverageAnalysis]: Checked inductivity of 1560 backedges. 807 proven. 47 refuted. 0 times theorem prover too weak. 706 trivial. 0 not checked. [2021-10-21 19:54:00,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [393235891] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:54:00,517 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:54:00,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 7] total 25 [2021-10-21 19:54:00,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083012013] [2021-10-21 19:54:00,517 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-21 19:54:00,517 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:54:00,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-21 19:54:00,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2021-10-21 19:54:00,518 INFO L87 Difference]: Start difference. First operand 866 states and 1012 transitions. Second operand has 25 states, 25 states have (on average 3.96) internal successors, (99), 25 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) [2021-10-21 19:54:02,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:54:02,116 INFO L93 Difference]: Finished difference Result 1933 states and 2278 transitions. [2021-10-21 19:54:02,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-10-21 19:54:02,119 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 3.96) internal successors, (99), 25 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2021-10-21 19:54:02,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:54:02,125 INFO L225 Difference]: With dead ends: 1933 [2021-10-21 19:54:02,125 INFO L226 Difference]: Without dead ends: 1203 [2021-10-21 19:54:02,129 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 113 SyntacticMatches, 0 SemanticMatches, 81 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1839 ImplicationChecksByTransitivity, 1179.5ms TimeCoverageRelationStatistics Valid=1816, Invalid=4990, Unknown=0, NotChecked=0, Total=6806 [2021-10-21 19:54:02,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1203 states. [2021-10-21 19:54:02,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1203 to 794. [2021-10-21 19:54:02,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 794 states, 793 states have (on average 1.1235813366960907) internal successors, (891), 793 states have internal predecessors, (891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:54:02,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 794 states to 794 states and 891 transitions. [2021-10-21 19:54:02,248 INFO L78 Accepts]: Start accepts. Automaton has 794 states and 891 transitions. Word has length 117 [2021-10-21 19:54:02,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:54:02,249 INFO L470 AbstractCegarLoop]: Abstraction has 794 states and 891 transitions. [2021-10-21 19:54:02,249 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 3.96) internal successors, (99), 25 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) [2021-10-21 19:54:02,249 INFO L276 IsEmpty]: Start isEmpty. Operand 794 states and 891 transitions. [2021-10-21 19:54:02,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-10-21 19:54:02,251 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:54:02,251 INFO L512 BasicCegarLoop]: trace histogram [34, 34, 20, 14, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:54:02,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-10-21 19:54:02,468 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-21 19:54:02,468 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:54:02,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:54:02,469 INFO L82 PathProgramCache]: Analyzing trace with hash 838744801, now seen corresponding path program 1 times [2021-10-21 19:54:02,469 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:54:02,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009663186] [2021-10-21 19:54:02,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:54:02,469 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:54:02,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:54:02,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1759 backedges. 984 proven. 0 refuted. 0 times theorem prover too weak. 775 trivial. 0 not checked. [2021-10-21 19:54:02,530 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:54:02,530 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009663186] [2021-10-21 19:54:02,530 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009663186] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-21 19:54:02,530 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-21 19:54:02,531 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-21 19:54:02,531 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175157775] [2021-10-21 19:54:02,531 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-10-21 19:54:02,531 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:54:02,532 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-10-21 19:54:02,532 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:54:02,532 INFO L87 Difference]: Start difference. First operand 794 states and 891 transitions. Second operand has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:54:02,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:54:02,721 INFO L93 Difference]: Finished difference Result 1253 states and 1372 transitions. [2021-10-21 19:54:02,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-10-21 19:54:02,722 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-10-21 19:54:02,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:54:02,727 INFO L225 Difference]: With dead ends: 1253 [2021-10-21 19:54:02,727 INFO L226 Difference]: Without dead ends: 1051 [2021-10-21 19:54:02,728 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 7.1ms TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2021-10-21 19:54:02,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1051 states. [2021-10-21 19:54:02,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1051 to 803. [2021-10-21 19:54:02,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 1.125935162094763) internal successors, (903), 802 states have internal predecessors, (903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:54:02,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 903 transitions. [2021-10-21 19:54:02,839 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 903 transitions. Word has length 123 [2021-10-21 19:54:02,839 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:54:02,839 INFO L470 AbstractCegarLoop]: Abstraction has 803 states and 903 transitions. [2021-10-21 19:54:02,839 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 6.0) internal successors, (30), 5 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:54:02,839 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 903 transitions. [2021-10-21 19:54:02,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2021-10-21 19:54:02,841 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:54:02,842 INFO L512 BasicCegarLoop]: trace histogram [34, 34, 19, 15, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:54:02,842 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2021-10-21 19:54:02,842 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:54:02,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:54:02,843 INFO L82 PathProgramCache]: Analyzing trace with hash -1273355935, now seen corresponding path program 4 times [2021-10-21 19:54:02,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:54:02,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994289406] [2021-10-21 19:54:02,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:54:02,843 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:54:02,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:54:03,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1759 backedges. 903 proven. 425 refuted. 0 times theorem prover too weak. 431 trivial. 0 not checked. [2021-10-21 19:54:03,095 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:54:03,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994289406] [2021-10-21 19:54:03,095 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994289406] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:54:03,095 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7816998] [2021-10-21 19:54:03,095 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:54:03,095 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:54:03,095 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:54:03,100 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:54:03,116 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-21 19:54:03,778 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:54:03,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:54:03,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 220 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-21 19:54:03,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:54:04,246 INFO L134 CoverageAnalysis]: Checked inductivity of 1759 backedges. 1033 proven. 206 refuted. 0 times theorem prover too weak. 520 trivial. 0 not checked. [2021-10-21 19:54:04,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7816998] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:54:04,246 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:54:04,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 11] total 30 [2021-10-21 19:54:04,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91224669] [2021-10-21 19:54:04,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-21 19:54:04,247 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:54:04,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-21 19:54:04,248 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=231, Invalid=639, Unknown=0, NotChecked=0, Total=870 [2021-10-21 19:54:04,248 INFO L87 Difference]: Start difference. First operand 803 states and 903 transitions. Second operand has 30 states, 30 states have (on average 3.6666666666666665) internal successors, (110), 30 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:54:05,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:54:05,572 INFO L93 Difference]: Finished difference Result 1871 states and 2087 transitions. [2021-10-21 19:54:05,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-10-21 19:54:05,572 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.6666666666666665) internal successors, (110), 30 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 123 [2021-10-21 19:54:05,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:54:05,578 INFO L225 Difference]: With dead ends: 1871 [2021-10-21 19:54:05,578 INFO L226 Difference]: Without dead ends: 1215 [2021-10-21 19:54:05,582 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1679 ImplicationChecksByTransitivity, 1194.2ms TimeCoverageRelationStatistics Valid=1937, Invalid=5035, Unknown=0, NotChecked=0, Total=6972 [2021-10-21 19:54:05,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1215 states. [2021-10-21 19:54:05,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1215 to 793. [2021-10-21 19:54:05,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 793 states, 792 states have (on average 1.1161616161616161) internal successors, (884), 792 states have internal predecessors, (884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:54:05,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 793 states to 793 states and 884 transitions. [2021-10-21 19:54:05,699 INFO L78 Accepts]: Start accepts. Automaton has 793 states and 884 transitions. Word has length 123 [2021-10-21 19:54:05,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:54:05,700 INFO L470 AbstractCegarLoop]: Abstraction has 793 states and 884 transitions. [2021-10-21 19:54:05,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.6666666666666665) internal successors, (110), 30 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:54:05,700 INFO L276 IsEmpty]: Start isEmpty. Operand 793 states and 884 transitions. [2021-10-21 19:54:05,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2021-10-21 19:54:05,702 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:54:05,703 INFO L512 BasicCegarLoop]: trace histogram [36, 36, 21, 15, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:54:05,741 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-10-21 19:54:05,924 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-21 19:54:05,924 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:54:05,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:54:05,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1151168365, now seen corresponding path program 5 times [2021-10-21 19:54:05,925 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:54:05,925 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792911631] [2021-10-21 19:54:05,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:54:05,925 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:54:05,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:54:06,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1970 backedges. 1010 proven. 477 refuted. 0 times theorem prover too weak. 483 trivial. 0 not checked. [2021-10-21 19:54:06,190 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:54:06,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792911631] [2021-10-21 19:54:06,191 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792911631] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:54:06,191 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [905789284] [2021-10-21 19:54:06,191 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 19:54:06,191 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:54:06,191 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:54:06,192 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:54:06,218 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-21 19:54:06,920 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2021-10-21 19:54:06,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:54:06,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-21 19:54:06,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:54:07,877 INFO L134 CoverageAnalysis]: Checked inductivity of 1970 backedges. 1257 proven. 451 refuted. 0 times theorem prover too weak. 262 trivial. 0 not checked. [2021-10-21 19:54:07,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [905789284] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:54:07,878 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:54:07,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 25] total 45 [2021-10-21 19:54:07,879 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [843367751] [2021-10-21 19:54:07,879 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2021-10-21 19:54:07,880 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:54:07,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2021-10-21 19:54:07,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=427, Invalid=1553, Unknown=0, NotChecked=0, Total=1980 [2021-10-21 19:54:07,883 INFO L87 Difference]: Start difference. First operand 793 states and 884 transitions. Second operand has 45 states, 45 states have (on average 3.4444444444444446) internal successors, (155), 45 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:54:09,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:54:09,516 INFO L93 Difference]: Finished difference Result 1897 states and 2110 transitions. [2021-10-21 19:54:09,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2021-10-21 19:54:09,516 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 45 states have (on average 3.4444444444444446) internal successors, (155), 45 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 129 [2021-10-21 19:54:09,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:54:09,521 INFO L225 Difference]: With dead ends: 1897 [2021-10-21 19:54:09,521 INFO L226 Difference]: Without dead ends: 1251 [2021-10-21 19:54:09,525 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 207 GetRequests, 107 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2803 ImplicationChecksByTransitivity, 1610.7ms TimeCoverageRelationStatistics Valid=2325, Invalid=7977, Unknown=0, NotChecked=0, Total=10302 [2021-10-21 19:54:09,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1251 states. [2021-10-21 19:54:09,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1251 to 1003. [2021-10-21 19:54:09,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1003 states, 1002 states have (on average 1.1047904191616766) internal successors, (1107), 1002 states have internal predecessors, (1107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:54:09,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1003 states to 1003 states and 1107 transitions. [2021-10-21 19:54:09,648 INFO L78 Accepts]: Start accepts. Automaton has 1003 states and 1107 transitions. Word has length 129 [2021-10-21 19:54:09,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:54:09,648 INFO L470 AbstractCegarLoop]: Abstraction has 1003 states and 1107 transitions. [2021-10-21 19:54:09,649 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 45 states have (on average 3.4444444444444446) internal successors, (155), 45 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:54:09,649 INFO L276 IsEmpty]: Start isEmpty. Operand 1003 states and 1107 transitions. [2021-10-21 19:54:09,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2021-10-21 19:54:09,651 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:54:09,651 INFO L512 BasicCegarLoop]: trace histogram [38, 38, 23, 15, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:54:09,683 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2021-10-21 19:54:09,868 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:54:09,868 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:54:09,868 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:54:09,868 INFO L82 PathProgramCache]: Analyzing trace with hash 244793185, now seen corresponding path program 6 times [2021-10-21 19:54:09,869 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:54:09,869 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749167157] [2021-10-21 19:54:09,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:54:09,869 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:54:09,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:54:10,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2193 backedges. 1123 proven. 532 refuted. 0 times theorem prover too weak. 538 trivial. 0 not checked. [2021-10-21 19:54:10,170 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:54:10,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749167157] [2021-10-21 19:54:10,170 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749167157] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:54:10,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515602957] [2021-10-21 19:54:10,170 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 19:54:10,170 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:54:10,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:54:10,172 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:54:10,187 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-21 19:54:10,761 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-21 19:54:10,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:54:10,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-21 19:54:10,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:54:12,013 INFO L134 CoverageAnalysis]: Checked inductivity of 2193 backedges. 247 proven. 1141 refuted. 0 times theorem prover too weak. 805 trivial. 0 not checked. [2021-10-21 19:54:12,013 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515602957] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:54:12,013 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:54:12,013 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 9] total 30 [2021-10-21 19:54:12,014 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338297970] [2021-10-21 19:54:12,014 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-10-21 19:54:12,014 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:54:12,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-10-21 19:54:12,015 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=252, Invalid=618, Unknown=0, NotChecked=0, Total=870 [2021-10-21 19:54:12,015 INFO L87 Difference]: Start difference. First operand 1003 states and 1107 transitions. Second operand has 30 states, 30 states have (on average 3.7) internal successors, (111), 30 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:54:14,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:54:14,807 INFO L93 Difference]: Finished difference Result 2162 states and 2408 transitions. [2021-10-21 19:54:14,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-10-21 19:54:14,808 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 3.7) internal successors, (111), 30 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 135 [2021-10-21 19:54:14,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:54:14,814 INFO L225 Difference]: With dead ends: 2162 [2021-10-21 19:54:14,815 INFO L226 Difference]: Without dead ends: 1354 [2021-10-21 19:54:14,820 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 261 GetRequests, 128 SyntacticMatches, 0 SemanticMatches, 133 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5858 ImplicationChecksByTransitivity, 2516.5ms TimeCoverageRelationStatistics Valid=3764, Invalid=14326, Unknown=0, NotChecked=0, Total=18090 [2021-10-21 19:54:14,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1354 states. [2021-10-21 19:54:14,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1354 to 1117. [2021-10-21 19:54:14,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1117 states, 1116 states have (on average 1.1155913978494623) internal successors, (1245), 1116 states have internal predecessors, (1245), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:54:14,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1117 states to 1117 states and 1245 transitions. [2021-10-21 19:54:14,947 INFO L78 Accepts]: Start accepts. Automaton has 1117 states and 1245 transitions. Word has length 135 [2021-10-21 19:54:14,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:54:14,947 INFO L470 AbstractCegarLoop]: Abstraction has 1117 states and 1245 transitions. [2021-10-21 19:54:14,947 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 3.7) internal successors, (111), 30 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:54:14,948 INFO L276 IsEmpty]: Start isEmpty. Operand 1117 states and 1245 transitions. [2021-10-21 19:54:14,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-10-21 19:54:14,950 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:54:14,950 INFO L512 BasicCegarLoop]: trace histogram [40, 40, 38, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:54:14,989 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-21 19:54:15,176 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-10-21 19:54:15,176 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:54:15,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:54:15,176 INFO L82 PathProgramCache]: Analyzing trace with hash 525616749, now seen corresponding path program 1 times [2021-10-21 19:54:15,177 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:54:15,177 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502571658] [2021-10-21 19:54:15,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:54:15,177 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:54:15,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:54:15,883 INFO L134 CoverageAnalysis]: Checked inductivity of 2428 backedges. 0 proven. 1858 refuted. 0 times theorem prover too weak. 570 trivial. 0 not checked. [2021-10-21 19:54:15,884 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:54:15,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502571658] [2021-10-21 19:54:15,884 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502571658] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:54:15,884 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025854013] [2021-10-21 19:54:15,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:54:15,884 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:54:15,884 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:54:15,885 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:54:15,886 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-21 19:54:16,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:54:16,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 262 conjuncts, 38 conjunts are in the unsatisfiable core [2021-10-21 19:54:16,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:54:18,624 INFO L134 CoverageAnalysis]: Checked inductivity of 2428 backedges. 0 proven. 1838 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2021-10-21 19:54:18,624 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025854013] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:54:18,624 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:54:18,625 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 28] total 54 [2021-10-21 19:54:18,625 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623956461] [2021-10-21 19:54:18,625 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 55 states [2021-10-21 19:54:18,626 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:54:18,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 55 interpolants. [2021-10-21 19:54:18,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=611, Invalid=2359, Unknown=0, NotChecked=0, Total=2970 [2021-10-21 19:54:18,627 INFO L87 Difference]: Start difference. First operand 1117 states and 1245 transitions. Second operand has 55 states, 55 states have (on average 3.018181818181818) internal successors, (166), 54 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:54:21,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:54:21,772 INFO L93 Difference]: Finished difference Result 1938 states and 2125 transitions. [2021-10-21 19:54:21,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2021-10-21 19:54:21,773 INFO L78 Accepts]: Start accepts. Automaton has has 55 states, 55 states have (on average 3.018181818181818) internal successors, (166), 54 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-10-21 19:54:21,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:54:21,779 INFO L225 Difference]: With dead ends: 1938 [2021-10-21 19:54:21,779 INFO L226 Difference]: Without dead ends: 1790 [2021-10-21 19:54:21,781 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5804 ImplicationChecksByTransitivity, 3517.1ms TimeCoverageRelationStatistics Valid=2911, Invalid=16271, Unknown=0, NotChecked=0, Total=19182 [2021-10-21 19:54:21,783 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1790 states. [2021-10-21 19:54:21,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1790 to 1421. [2021-10-21 19:54:21,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1421 states, 1420 states have (on average 1.1119718309859155) internal successors, (1579), 1420 states have internal predecessors, (1579), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:54:21,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1421 states to 1421 states and 1579 transitions. [2021-10-21 19:54:21,917 INFO L78 Accepts]: Start accepts. Automaton has 1421 states and 1579 transitions. Word has length 141 [2021-10-21 19:54:21,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:54:21,917 INFO L470 AbstractCegarLoop]: Abstraction has 1421 states and 1579 transitions. [2021-10-21 19:54:21,917 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 55 states, 55 states have (on average 3.018181818181818) internal successors, (166), 54 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:54:21,918 INFO L276 IsEmpty]: Start isEmpty. Operand 1421 states and 1579 transitions. [2021-10-21 19:54:21,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-10-21 19:54:21,921 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:54:21,921 INFO L512 BasicCegarLoop]: trace histogram [40, 40, 39, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:54:21,964 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-21 19:54:22,136 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:54:22,136 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:54:22,136 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:54:22,137 INFO L82 PathProgramCache]: Analyzing trace with hash 714830123, now seen corresponding path program 2 times [2021-10-21 19:54:22,137 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:54:22,137 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880046491] [2021-10-21 19:54:22,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:54:22,137 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:54:22,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:54:22,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2428 backedges. 587 proven. 1841 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:54:22,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:54:22,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880046491] [2021-10-21 19:54:22,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880046491] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:54:22,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984355719] [2021-10-21 19:54:22,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:54:22,799 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:54:22,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:54:22,799 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:54:22,800 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-21 19:54:23,631 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:54:23,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:54:23,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 23 conjunts are in the unsatisfiable core [2021-10-21 19:54:23,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:54:24,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2428 backedges. 86 proven. 1752 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2021-10-21 19:54:24,568 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984355719] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:54:24,569 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:54:24,569 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 23] total 64 [2021-10-21 19:54:24,569 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345992926] [2021-10-21 19:54:24,569 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2021-10-21 19:54:24,569 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:54:24,570 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2021-10-21 19:54:24,570 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=927, Invalid=3105, Unknown=0, NotChecked=0, Total=4032 [2021-10-21 19:54:24,571 INFO L87 Difference]: Start difference. First operand 1421 states and 1579 transitions. Second operand has 64 states, 64 states have (on average 3.328125) internal successors, (213), 64 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:54:26,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:54:26,578 INFO L93 Difference]: Finished difference Result 2544 states and 2842 transitions. [2021-10-21 19:54:26,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-10-21 19:54:26,578 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 3.328125) internal successors, (213), 64 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 141 [2021-10-21 19:54:26,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:54:26,586 INFO L225 Difference]: With dead ends: 2544 [2021-10-21 19:54:26,587 INFO L226 Difference]: Without dead ends: 1654 [2021-10-21 19:54:26,589 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 245 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4030 ImplicationChecksByTransitivity, 1998.0ms TimeCoverageRelationStatistics Valid=3100, Invalid=12400, Unknown=0, NotChecked=0, Total=15500 [2021-10-21 19:54:26,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1654 states. [2021-10-21 19:54:26,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1654 to 1640. [2021-10-21 19:54:26,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1640 states, 1639 states have (on average 1.0835875533862112) internal successors, (1776), 1639 states have internal predecessors, (1776), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:54:26,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1640 states to 1640 states and 1776 transitions. [2021-10-21 19:54:26,739 INFO L78 Accepts]: Start accepts. Automaton has 1640 states and 1776 transitions. Word has length 141 [2021-10-21 19:54:26,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:54:26,740 INFO L470 AbstractCegarLoop]: Abstraction has 1640 states and 1776 transitions. [2021-10-21 19:54:26,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 3.328125) internal successors, (213), 64 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:54:26,740 INFO L276 IsEmpty]: Start isEmpty. Operand 1640 states and 1776 transitions. [2021-10-21 19:54:26,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2021-10-21 19:54:26,743 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:54:26,743 INFO L512 BasicCegarLoop]: trace histogram [40, 40, 40, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:54:26,769 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2021-10-21 19:54:26,956 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:54:26,956 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:54:26,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:54:26,956 INFO L82 PathProgramCache]: Analyzing trace with hash 2094903851, now seen corresponding path program 1 times [2021-10-21 19:54:26,957 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:54:26,957 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096041816] [2021-10-21 19:54:26,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:54:26,957 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:54:26,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:54:27,058 INFO L134 CoverageAnalysis]: Checked inductivity of 2428 backedges. 2 proven. 1246 refuted. 0 times theorem prover too weak. 1180 trivial. 0 not checked. [2021-10-21 19:54:27,058 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:54:27,058 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096041816] [2021-10-21 19:54:27,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096041816] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:54:27,059 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1848641375] [2021-10-21 19:54:27,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:54:27,059 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:54:27,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:54:27,064 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:54:27,082 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-21 19:54:27,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:54:27,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 19:54:27,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:54:28,663 INFO L134 CoverageAnalysis]: Checked inductivity of 2428 backedges. 2 proven. 1246 refuted. 0 times theorem prover too weak. 1180 trivial. 0 not checked. [2021-10-21 19:54:28,663 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1848641375] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:54:28,664 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:54:28,664 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 8 [2021-10-21 19:54:28,664 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000441543] [2021-10-21 19:54:28,665 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-10-21 19:54:28,665 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:54:28,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-10-21 19:54:28,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:54:28,666 INFO L87 Difference]: Start difference. First operand 1640 states and 1776 transitions. Second operand has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 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) [2021-10-21 19:54:28,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:54:28,820 INFO L93 Difference]: Finished difference Result 1796 states and 1938 transitions. [2021-10-21 19:54:28,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-10-21 19:54:28,821 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 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 141 [2021-10-21 19:54:28,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:54:28,826 INFO L225 Difference]: With dead ends: 1796 [2021-10-21 19:54:28,827 INFO L226 Difference]: Without dead ends: 1720 [2021-10-21 19:54:28,827 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 145 GetRequests, 138 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 28.4ms TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2021-10-21 19:54:28,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1720 states. [2021-10-21 19:54:28,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1720 to 1714. [2021-10-21 19:54:28,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1714 states, 1713 states have (on average 1.0817279626386456) internal successors, (1853), 1713 states have internal predecessors, (1853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:54:28,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1714 states to 1714 states and 1853 transitions. [2021-10-21 19:54:28,965 INFO L78 Accepts]: Start accepts. Automaton has 1714 states and 1853 transitions. Word has length 141 [2021-10-21 19:54:28,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:54:28,965 INFO L470 AbstractCegarLoop]: Abstraction has 1714 states and 1853 transitions. [2021-10-21 19:54:28,965 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 5.333333333333333) internal successors, (48), 8 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) [2021-10-21 19:54:28,966 INFO L276 IsEmpty]: Start isEmpty. Operand 1714 states and 1853 transitions. [2021-10-21 19:54:28,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-10-21 19:54:28,968 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:54:28,969 INFO L512 BasicCegarLoop]: trace histogram [41, 41, 40, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:54:28,993 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2021-10-21 19:54:29,174 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-10-21 19:54:29,175 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:54:29,175 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:54:29,175 INFO L82 PathProgramCache]: Analyzing trace with hash 574504483, now seen corresponding path program 7 times [2021-10-21 19:54:29,175 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:54:29,175 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070426626] [2021-10-21 19:54:29,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:54:29,176 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:54:29,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:54:29,896 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 701 proven. 1849 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-21 19:54:29,896 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:54:29,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070426626] [2021-10-21 19:54:29,896 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070426626] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:54:29,896 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147965851] [2021-10-21 19:54:29,897 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 19:54:29,897 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:54:29,897 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:54:29,898 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:54:29,899 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-21 19:54:30,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:54:30,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 42 conjunts are in the unsatisfiable core [2021-10-21 19:54:30,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:54:31,951 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 797 proven. 1751 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-10-21 19:54:31,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147965851] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:54:31,951 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:54:31,951 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 43] total 65 [2021-10-21 19:54:31,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837982822] [2021-10-21 19:54:31,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2021-10-21 19:54:31,952 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:54:31,953 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2021-10-21 19:54:31,953 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=950, Invalid=3210, Unknown=0, NotChecked=0, Total=4160 [2021-10-21 19:54:31,953 INFO L87 Difference]: Start difference. First operand 1714 states and 1853 transitions. Second operand has 65 states, 65 states have (on average 3.230769230769231) internal successors, (210), 65 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:54:34,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:54:34,022 INFO L93 Difference]: Finished difference Result 2006 states and 2163 transitions. [2021-10-21 19:54:34,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2021-10-21 19:54:34,023 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.230769230769231) internal successors, (210), 65 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 144 [2021-10-21 19:54:34,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:54:34,029 INFO L225 Difference]: With dead ends: 2006 [2021-10-21 19:54:34,029 INFO L226 Difference]: Without dead ends: 1701 [2021-10-21 19:54:34,032 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 281 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 157 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7016 ImplicationChecksByTransitivity, 2490.0ms TimeCoverageRelationStatistics Valid=5539, Invalid=19583, Unknown=0, NotChecked=0, Total=25122 [2021-10-21 19:54:34,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1701 states. [2021-10-21 19:54:34,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1701 to 1566. [2021-10-21 19:54:34,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1566 states, 1565 states have (on average 1.0830670926517572) internal successors, (1695), 1565 states have internal predecessors, (1695), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:54:34,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1566 states to 1566 states and 1695 transitions. [2021-10-21 19:54:34,202 INFO L78 Accepts]: Start accepts. Automaton has 1566 states and 1695 transitions. Word has length 144 [2021-10-21 19:54:34,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:54:34,203 INFO L470 AbstractCegarLoop]: Abstraction has 1566 states and 1695 transitions. [2021-10-21 19:54:34,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.230769230769231) internal successors, (210), 65 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:54:34,203 INFO L276 IsEmpty]: Start isEmpty. Operand 1566 states and 1695 transitions. [2021-10-21 19:54:34,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 145 [2021-10-21 19:54:34,206 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:54:34,206 INFO L512 BasicCegarLoop]: trace histogram [41, 41, 40, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:54:34,243 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2021-10-21 19:54:34,432 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-10-21 19:54:34,432 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:54:34,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:54:34,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1051056613, now seen corresponding path program 3 times [2021-10-21 19:54:34,432 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:54:34,433 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311728931] [2021-10-21 19:54:34,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:54:34,433 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:54:34,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:54:34,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 721 proven. 1238 refuted. 0 times theorem prover too weak. 591 trivial. 0 not checked. [2021-10-21 19:54:34,798 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:54:34,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311728931] [2021-10-21 19:54:34,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311728931] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:54:34,798 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025288504] [2021-10-21 19:54:34,798 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:54:34,798 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:54:34,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:54:34,800 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:54:34,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-21 19:54:35,827 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-21 19:54:35,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:54:35,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 5 conjunts are in the unsatisfiable core [2021-10-21 19:54:35,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:54:36,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2550 backedges. 1350 proven. 20 refuted. 0 times theorem prover too weak. 1180 trivial. 0 not checked. [2021-10-21 19:54:36,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025288504] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:54:36,207 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:54:36,208 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 4] total 26 [2021-10-21 19:54:36,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1393201328] [2021-10-21 19:54:36,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-10-21 19:54:36,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:54:36,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-10-21 19:54:36,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=240, Invalid=410, Unknown=0, NotChecked=0, Total=650 [2021-10-21 19:54:36,209 INFO L87 Difference]: Start difference. First operand 1566 states and 1695 transitions. Second operand has 26 states, 26 states have (on average 4.153846153846154) internal successors, (108), 26 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) [2021-10-21 19:54:37,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:54:37,755 INFO L93 Difference]: Finished difference Result 2515 states and 2719 transitions. [2021-10-21 19:54:37,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 84 states. [2021-10-21 19:54:37,756 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 4.153846153846154) internal successors, (108), 26 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 144 [2021-10-21 19:54:37,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:54:37,760 INFO L225 Difference]: With dead ends: 2515 [2021-10-21 19:54:37,760 INFO L226 Difference]: Without dead ends: 1151 [2021-10-21 19:54:37,762 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 267 GetRequests, 163 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2361 ImplicationChecksByTransitivity, 1308.8ms TimeCoverageRelationStatistics Valid=3000, Invalid=8130, Unknown=0, NotChecked=0, Total=11130 [2021-10-21 19:54:37,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1151 states. [2021-10-21 19:54:37,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1151 to 1145. [2021-10-21 19:54:37,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1145 states, 1144 states have (on average 1.06993006993007) internal successors, (1224), 1144 states have internal predecessors, (1224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:54:37,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1145 states to 1145 states and 1224 transitions. [2021-10-21 19:54:37,872 INFO L78 Accepts]: Start accepts. Automaton has 1145 states and 1224 transitions. Word has length 144 [2021-10-21 19:54:37,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:54:37,873 INFO L470 AbstractCegarLoop]: Abstraction has 1145 states and 1224 transitions. [2021-10-21 19:54:37,873 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 4.153846153846154) internal successors, (108), 26 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) [2021-10-21 19:54:37,873 INFO L276 IsEmpty]: Start isEmpty. Operand 1145 states and 1224 transitions. [2021-10-21 19:54:37,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-10-21 19:54:37,877 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:54:37,877 INFO L512 BasicCegarLoop]: trace histogram [60, 60, 57, 3, 3, 3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1] [2021-10-21 19:54:37,918 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2021-10-21 19:54:38,104 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2021-10-21 19:54:38,104 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:54:38,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:54:38,104 INFO L82 PathProgramCache]: Analyzing trace with hash -668312775, now seen corresponding path program 4 times [2021-10-21 19:54:38,105 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:54:38,105 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256171225] [2021-10-21 19:54:38,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:54:38,105 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:54:38,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:54:38,725 INFO L134 CoverageAnalysis]: Checked inductivity of 5514 backedges. 61 proven. 4267 refuted. 0 times theorem prover too weak. 1186 trivial. 0 not checked. [2021-10-21 19:54:38,725 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:54:38,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256171225] [2021-10-21 19:54:38,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256171225] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:54:38,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825321553] [2021-10-21 19:54:38,726 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:54:38,726 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:54:38,726 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:54:38,726 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:54:38,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-21 19:54:39,815 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:54:39,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:54:39,818 INFO L263 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 62 conjunts are in the unsatisfiable core [2021-10-21 19:54:39,821 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:54:42,882 INFO L134 CoverageAnalysis]: Checked inductivity of 5514 backedges. 532 proven. 4392 refuted. 0 times theorem prover too weak. 590 trivial. 0 not checked. [2021-10-21 19:54:42,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825321553] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:54:42,883 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:54:42,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 50] total 75 [2021-10-21 19:54:42,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153783954] [2021-10-21 19:54:42,884 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2021-10-21 19:54:42,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:54:42,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2021-10-21 19:54:42,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1092, Invalid=4458, Unknown=0, NotChecked=0, Total=5550 [2021-10-21 19:54:42,885 INFO L87 Difference]: Start difference. First operand 1145 states and 1224 transitions. Second operand has 75 states, 75 states have (on average 3.2133333333333334) internal successors, (241), 75 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:54:46,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:54:46,251 INFO L93 Difference]: Finished difference Result 1676 states and 1791 transitions. [2021-10-21 19:54:46,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2021-10-21 19:54:46,252 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 3.2133333333333334) internal successors, (241), 75 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 209 [2021-10-21 19:54:46,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:54:46,255 INFO L225 Difference]: With dead ends: 1676 [2021-10-21 19:54:46,255 INFO L226 Difference]: Without dead ends: 768 [2021-10-21 19:54:46,257 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 162 SyntacticMatches, 2 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10117 ImplicationChecksByTransitivity, 3802.9ms TimeCoverageRelationStatistics Valid=4357, Invalid=23699, Unknown=0, NotChecked=0, Total=28056 [2021-10-21 19:54:46,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 768 states. [2021-10-21 19:54:46,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 768 to 346. [2021-10-21 19:54:46,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 346 states, 345 states have (on average 1.0231884057971015) internal successors, (353), 345 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:54:46,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 346 states to 346 states and 353 transitions. [2021-10-21 19:54:46,275 INFO L78 Accepts]: Start accepts. Automaton has 346 states and 353 transitions. Word has length 209 [2021-10-21 19:54:46,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:54:46,275 INFO L470 AbstractCegarLoop]: Abstraction has 346 states and 353 transitions. [2021-10-21 19:54:46,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 3.2133333333333334) internal successors, (241), 75 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:54:46,276 INFO L276 IsEmpty]: Start isEmpty. Operand 346 states and 353 transitions. [2021-10-21 19:54:46,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2021-10-21 19:54:46,276 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:54:46,277 INFO L512 BasicCegarLoop]: trace histogram [60, 60, 60, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:54:46,300 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-10-21 19:54:46,477 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-10-21 19:54:46,477 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:54:46,478 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:54:46,478 INFO L82 PathProgramCache]: Analyzing trace with hash -2084159889, now seen corresponding path program 2 times [2021-10-21 19:54:46,478 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:54:46,478 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799380009] [2021-10-21 19:54:46,478 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:54:46,479 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:54:46,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:54:46,572 INFO L134 CoverageAnalysis]: Checked inductivity of 5514 backedges. 4 proven. 3740 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2021-10-21 19:54:46,572 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:54:46,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799380009] [2021-10-21 19:54:46,572 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799380009] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:54:46,572 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165218793] [2021-10-21 19:54:46,573 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:54:46,573 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:54:46,573 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:54:46,574 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:54:46,590 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-21 19:54:48,101 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:54:48,102 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:54:48,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 367 conjuncts, 6 conjunts are in the unsatisfiable core [2021-10-21 19:54:48,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:54:49,165 INFO L134 CoverageAnalysis]: Checked inductivity of 5514 backedges. 4 proven. 3740 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2021-10-21 19:54:49,165 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165218793] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:54:49,165 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:54:49,166 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-10-21 19:54:49,166 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868157565] [2021-10-21 19:54:49,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2021-10-21 19:54:49,167 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:54:49,167 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-10-21 19:54:49,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:54:49,167 INFO L87 Difference]: Start difference. First operand 346 states and 353 transitions. Second operand has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 10 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) [2021-10-21 19:54:49,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:54:49,221 INFO L93 Difference]: Finished difference Result 484 states and 495 transitions. [2021-10-21 19:54:49,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-21 19:54:49,221 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 10 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 209 [2021-10-21 19:54:49,221 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:54:49,223 INFO L225 Difference]: With dead ends: 484 [2021-10-21 19:54:49,223 INFO L226 Difference]: Without dead ends: 414 [2021-10-21 19:54:49,224 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 214 GetRequests, 205 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 40.8ms TimeCoverageRelationStatistics Valid=49, Invalid=61, Unknown=0, NotChecked=0, Total=110 [2021-10-21 19:54:49,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 414 states. [2021-10-21 19:54:49,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 414 to 414. [2021-10-21 19:54:49,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 414 states, 413 states have (on average 1.0217917675544794) internal successors, (422), 413 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:54:49,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 414 states to 414 states and 422 transitions. [2021-10-21 19:54:49,253 INFO L78 Accepts]: Start accepts. Automaton has 414 states and 422 transitions. Word has length 209 [2021-10-21 19:54:49,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:54:49,254 INFO L470 AbstractCegarLoop]: Abstraction has 414 states and 422 transitions. [2021-10-21 19:54:49,254 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 6.363636363636363) internal successors, (70), 10 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) [2021-10-21 19:54:49,254 INFO L276 IsEmpty]: Start isEmpty. Operand 414 states and 422 transitions. [2021-10-21 19:54:49,256 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 278 [2021-10-21 19:54:49,256 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:54:49,256 INFO L512 BasicCegarLoop]: trace histogram [80, 80, 80, 4, 4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:54:49,299 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-21 19:54:49,472 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-10-21 19:54:49,472 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:54:49,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:54:49,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1255336115, now seen corresponding path program 3 times [2021-10-21 19:54:49,472 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:54:49,473 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944220209] [2021-10-21 19:54:49,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:54:49,473 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:54:49,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:54:49,591 INFO L134 CoverageAnalysis]: Checked inductivity of 9848 backedges. 6 proven. 7482 refuted. 0 times theorem prover too weak. 2360 trivial. 0 not checked. [2021-10-21 19:54:49,591 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:54:49,591 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944220209] [2021-10-21 19:54:49,592 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944220209] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:54:49,592 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748249623] [2021-10-21 19:54:49,592 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:54:49,592 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:54:49,592 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:54:49,593 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:54:49,609 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-21 19:54:51,367 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 63 check-sat command(s) [2021-10-21 19:54:51,367 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:54:51,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 469 conjuncts, 7 conjunts are in the unsatisfiable core [2021-10-21 19:54:51,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:54:52,923 INFO L134 CoverageAnalysis]: Checked inductivity of 9848 backedges. 6 proven. 7482 refuted. 0 times theorem prover too weak. 2360 trivial. 0 not checked. [2021-10-21 19:54:52,923 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748249623] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:54:52,923 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:54:52,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-21 19:54:52,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664086126] [2021-10-21 19:54:52,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-21 19:54:52,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:54:52,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-21 19:54:52,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:54:52,926 INFO L87 Difference]: Start difference. First operand 414 states and 422 transitions. Second operand has 13 states, 13 states have (on average 7.076923076923077) internal successors, (92), 12 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) [2021-10-21 19:54:53,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:54:53,019 INFO L93 Difference]: Finished difference Result 552 states and 564 transitions. [2021-10-21 19:54:53,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-21 19:54:53,020 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 7.076923076923077) internal successors, (92), 12 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 277 [2021-10-21 19:54:53,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:54:53,023 INFO L225 Difference]: With dead ends: 552 [2021-10-21 19:54:53,023 INFO L226 Difference]: Without dead ends: 482 [2021-10-21 19:54:53,023 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 272 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 55.0ms TimeCoverageRelationStatistics Valid=68, Invalid=88, Unknown=0, NotChecked=0, Total=156 [2021-10-21 19:54:53,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 482 states. [2021-10-21 19:54:53,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 482 to 482. [2021-10-21 19:54:53,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 482 states, 481 states have (on average 1.0207900207900207) internal successors, (491), 481 states have internal predecessors, (491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:54:53,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 482 states to 482 states and 491 transitions. [2021-10-21 19:54:53,057 INFO L78 Accepts]: Start accepts. Automaton has 482 states and 491 transitions. Word has length 277 [2021-10-21 19:54:53,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:54:53,058 INFO L470 AbstractCegarLoop]: Abstraction has 482 states and 491 transitions. [2021-10-21 19:54:53,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 7.076923076923077) internal successors, (92), 12 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) [2021-10-21 19:54:53,058 INFO L276 IsEmpty]: Start isEmpty. Operand 482 states and 491 transitions. [2021-10-21 19:54:53,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 346 [2021-10-21 19:54:53,060 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:54:53,060 INFO L512 BasicCegarLoop]: trace histogram [100, 100, 100, 5, 5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:54:53,098 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-10-21 19:54:53,276 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-10-21 19:54:53,276 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:54:53,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:54:53,276 INFO L82 PathProgramCache]: Analyzing trace with hash -1898663689, now seen corresponding path program 4 times [2021-10-21 19:54:53,276 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:54:53,276 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1568073337] [2021-10-21 19:54:53,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:54:53,277 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:54:53,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:54:53,429 INFO L134 CoverageAnalysis]: Checked inductivity of 15430 backedges. 8 proven. 12472 refuted. 0 times theorem prover too weak. 2950 trivial. 0 not checked. [2021-10-21 19:54:53,430 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:54:53,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1568073337] [2021-10-21 19:54:53,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1568073337] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:54:53,430 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085101723] [2021-10-21 19:54:53,430 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:54:53,431 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:54:53,431 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:54:53,432 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:54:53,447 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-10-21 19:54:55,128 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:54:55,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:54:55,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-21 19:54:55,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:54:57,164 INFO L134 CoverageAnalysis]: Checked inductivity of 15430 backedges. 540 proven. 12530 refuted. 0 times theorem prover too weak. 2360 trivial. 0 not checked. [2021-10-21 19:54:57,164 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085101723] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:54:57,164 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:54:57,165 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 29] total 36 [2021-10-21 19:54:57,165 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673135588] [2021-10-21 19:54:57,166 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-10-21 19:54:57,166 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:54:57,166 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-10-21 19:54:57,167 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=344, Invalid=916, Unknown=0, NotChecked=0, Total=1260 [2021-10-21 19:54:57,167 INFO L87 Difference]: Start difference. First operand 482 states and 491 transitions. Second operand has 36 states, 36 states have (on average 4.833333333333333) internal successors, (174), 36 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:54:57,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:54:57,638 INFO L93 Difference]: Finished difference Result 621 states and 634 transitions. [2021-10-21 19:54:57,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-10-21 19:54:57,638 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 4.833333333333333) internal successors, (174), 36 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 345 [2021-10-21 19:54:57,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:54:57,642 INFO L225 Difference]: With dead ends: 621 [2021-10-21 19:54:57,642 INFO L226 Difference]: Without dead ends: 551 [2021-10-21 19:54:57,643 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 372 GetRequests, 318 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 493 ImplicationChecksByTransitivity, 630.3ms TimeCoverageRelationStatistics Valid=1064, Invalid=2016, Unknown=0, NotChecked=0, Total=3080 [2021-10-21 19:54:57,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 551 states. [2021-10-21 19:54:57,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 551 to 550. [2021-10-21 19:54:57,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 550 states, 549 states have (on average 1.0200364298724955) internal successors, (560), 549 states have internal predecessors, (560), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:54:57,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 550 states to 550 states and 560 transitions. [2021-10-21 19:54:57,682 INFO L78 Accepts]: Start accepts. Automaton has 550 states and 560 transitions. Word has length 345 [2021-10-21 19:54:57,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:54:57,683 INFO L470 AbstractCegarLoop]: Abstraction has 550 states and 560 transitions. [2021-10-21 19:54:57,683 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 4.833333333333333) internal successors, (174), 36 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:54:57,684 INFO L276 IsEmpty]: Start isEmpty. Operand 550 states and 560 transitions. [2021-10-21 19:54:57,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 414 [2021-10-21 19:54:57,686 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:54:57,687 INFO L512 BasicCegarLoop]: trace histogram [120, 120, 120, 6, 6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:54:57,729 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-10-21 19:54:57,900 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-10-21 19:54:57,900 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:54:57,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:54:57,900 INFO L82 PathProgramCache]: Analyzing trace with hash 874288955, now seen corresponding path program 5 times [2021-10-21 19:54:57,900 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:54:57,901 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442069011] [2021-10-21 19:54:57,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:54:57,901 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:54:57,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:54:58,088 INFO L134 CoverageAnalysis]: Checked inductivity of 22260 backedges. 10 proven. 18710 refuted. 0 times theorem prover too weak. 3540 trivial. 0 not checked. [2021-10-21 19:54:58,088 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:54:58,088 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442069011] [2021-10-21 19:54:58,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1442069011] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:54:58,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1151250728] [2021-10-21 19:54:58,089 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 19:54:58,089 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:54:58,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:54:58,092 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:54:58,109 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-10-21 19:55:00,413 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 85 check-sat command(s) [2021-10-21 19:55:00,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:55:00,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 673 conjuncts, 31 conjunts are in the unsatisfiable core [2021-10-21 19:55:00,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:02,751 INFO L134 CoverageAnalysis]: Checked inductivity of 22260 backedges. 580 proven. 18730 refuted. 0 times theorem prover too weak. 2950 trivial. 0 not checked. [2021-10-21 19:55:02,752 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1151250728] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:02,752 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:55:02,752 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 31] total 39 [2021-10-21 19:55:02,752 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016041377] [2021-10-21 19:55:02,753 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 39 states [2021-10-21 19:55:02,753 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:02,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 39 interpolants. [2021-10-21 19:55:02,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=1089, Unknown=0, NotChecked=0, Total=1482 [2021-10-21 19:55:02,754 INFO L87 Difference]: Start difference. First operand 550 states and 560 transitions. Second operand has 39 states, 39 states have (on average 5.0256410256410255) internal successors, (196), 39 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:55:03,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:03,540 INFO L93 Difference]: Finished difference Result 689 states and 703 transitions. [2021-10-21 19:55:03,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-10-21 19:55:03,541 INFO L78 Accepts]: Start accepts. Automaton has has 39 states, 39 states have (on average 5.0256410256410255) internal successors, (196), 39 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 413 [2021-10-21 19:55:03,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:03,543 INFO L225 Difference]: With dead ends: 689 [2021-10-21 19:55:03,543 INFO L226 Difference]: Without dead ends: 619 [2021-10-21 19:55:03,544 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 384 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 945.4ms TimeCoverageRelationStatistics Valid=2182, Invalid=4138, Unknown=0, NotChecked=0, Total=6320 [2021-10-21 19:55:03,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 619 states. [2021-10-21 19:55:03,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 619 to 618. [2021-10-21 19:55:03,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 618 states, 617 states have (on average 1.019448946515397) internal successors, (629), 617 states have internal predecessors, (629), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:55:03,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 618 states to 618 states and 629 transitions. [2021-10-21 19:55:03,604 INFO L78 Accepts]: Start accepts. Automaton has 618 states and 629 transitions. Word has length 413 [2021-10-21 19:55:03,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:03,604 INFO L470 AbstractCegarLoop]: Abstraction has 618 states and 629 transitions. [2021-10-21 19:55:03,604 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 39 states, 39 states have (on average 5.0256410256410255) internal successors, (196), 39 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:55:03,605 INFO L276 IsEmpty]: Start isEmpty. Operand 618 states and 629 transitions. [2021-10-21 19:55:03,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 482 [2021-10-21 19:55:03,606 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:03,607 INFO L512 BasicCegarLoop]: trace histogram [140, 140, 140, 7, 7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:55:03,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-10-21 19:55:03,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:03,807 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:03,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:03,808 INFO L82 PathProgramCache]: Analyzing trace with hash -2038719617, now seen corresponding path program 6 times [2021-10-21 19:55:03,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:03,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986450878] [2021-10-21 19:55:03,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:03,808 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:03,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:55:04,019 INFO L134 CoverageAnalysis]: Checked inductivity of 30338 backedges. 12 proven. 26196 refuted. 0 times theorem prover too weak. 4130 trivial. 0 not checked. [2021-10-21 19:55:04,019 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:04,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986450878] [2021-10-21 19:55:04,020 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986450878] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:04,020 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1880364321] [2021-10-21 19:55:04,020 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 19:55:04,020 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:04,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:04,021 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:04,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-10-21 19:55:06,404 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 65 check-sat command(s) [2021-10-21 19:55:06,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:55:06,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 691 conjuncts, 10 conjunts are in the unsatisfiable core [2021-10-21 19:55:06,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:08,925 INFO L134 CoverageAnalysis]: Checked inductivity of 30338 backedges. 12 proven. 26196 refuted. 0 times theorem prover too weak. 4130 trivial. 0 not checked. [2021-10-21 19:55:08,925 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1880364321] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:08,925 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:55:08,925 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-10-21 19:55:08,925 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1797515396] [2021-10-21 19:55:08,926 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-21 19:55:08,926 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:08,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-21 19:55:08,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-10-21 19:55:08,927 INFO L87 Difference]: Start difference. First operand 618 states and 629 transitions. Second operand has 19 states, 19 states have (on average 8.31578947368421) internal successors, (158), 18 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:55:09,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:09,036 INFO L93 Difference]: Finished difference Result 756 states and 771 transitions. [2021-10-21 19:55:09,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-21 19:55:09,037 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 8.31578947368421) internal successors, (158), 18 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 481 [2021-10-21 19:55:09,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:09,040 INFO L225 Difference]: With dead ends: 756 [2021-10-21 19:55:09,041 INFO L226 Difference]: Without dead ends: 686 [2021-10-21 19:55:09,041 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 490 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 100.4ms TimeCoverageRelationStatistics Valid=143, Invalid=199, Unknown=0, NotChecked=0, Total=342 [2021-10-21 19:55:09,042 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 686 states. [2021-10-21 19:55:09,079 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 686 to 686. [2021-10-21 19:55:09,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 686 states, 685 states have (on average 1.018978102189781) internal successors, (698), 685 states have internal predecessors, (698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:55:09,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 686 states to 686 states and 698 transitions. [2021-10-21 19:55:09,081 INFO L78 Accepts]: Start accepts. Automaton has 686 states and 698 transitions. Word has length 481 [2021-10-21 19:55:09,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:09,081 INFO L470 AbstractCegarLoop]: Abstraction has 686 states and 698 transitions. [2021-10-21 19:55:09,082 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 8.31578947368421) internal successors, (158), 18 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:55:09,082 INFO L276 IsEmpty]: Start isEmpty. Operand 686 states and 698 transitions. [2021-10-21 19:55:09,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 550 [2021-10-21 19:55:09,086 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:09,086 INFO L512 BasicCegarLoop]: trace histogram [160, 160, 160, 8, 8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:55:09,118 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2021-10-21 19:55:09,304 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:09,304 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:09,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:09,305 INFO L82 PathProgramCache]: Analyzing trace with hash 2034417091, now seen corresponding path program 7 times [2021-10-21 19:55:09,305 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:09,305 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363304159] [2021-10-21 19:55:09,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:09,305 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:09,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:55:09,547 INFO L134 CoverageAnalysis]: Checked inductivity of 39664 backedges. 14 proven. 34930 refuted. 0 times theorem prover too weak. 4720 trivial. 0 not checked. [2021-10-21 19:55:09,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:09,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363304159] [2021-10-21 19:55:09,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363304159] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:09,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [197430443] [2021-10-21 19:55:09,548 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 19:55:09,548 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:09,548 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:09,549 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:09,565 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-10-21 19:55:11,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:55:11,853 INFO L263 TraceCheckSpWp]: Trace formula consists of 877 conjuncts, 11 conjunts are in the unsatisfiable core [2021-10-21 19:55:11,859 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:14,698 INFO L134 CoverageAnalysis]: Checked inductivity of 39664 backedges. 14 proven. 34930 refuted. 0 times theorem prover too weak. 4720 trivial. 0 not checked. [2021-10-21 19:55:14,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [197430443] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:14,698 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:55:14,699 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-10-21 19:55:14,699 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228048290] [2021-10-21 19:55:14,699 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-10-21 19:55:14,700 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:14,700 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-10-21 19:55:14,700 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-10-21 19:55:14,700 INFO L87 Difference]: Start difference. First operand 686 states and 698 transitions. Second operand has 21 states, 21 states have (on average 8.571428571428571) internal successors, (180), 20 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:55:14,803 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:14,803 INFO L93 Difference]: Finished difference Result 824 states and 840 transitions. [2021-10-21 19:55:14,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-21 19:55:14,804 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 8.571428571428571) internal successors, (180), 20 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 549 [2021-10-21 19:55:14,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:14,807 INFO L225 Difference]: With dead ends: 824 [2021-10-21 19:55:14,807 INFO L226 Difference]: Without dead ends: 754 [2021-10-21 19:55:14,808 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 559 GetRequests, 540 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 122.4ms TimeCoverageRelationStatistics Valid=174, Invalid=246, Unknown=0, NotChecked=0, Total=420 [2021-10-21 19:55:14,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 754 states. [2021-10-21 19:55:14,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 754 to 754. [2021-10-21 19:55:14,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 754 states, 753 states have (on average 1.0185922974767596) internal successors, (767), 753 states have internal predecessors, (767), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:55:14,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 754 states to 754 states and 767 transitions. [2021-10-21 19:55:14,853 INFO L78 Accepts]: Start accepts. Automaton has 754 states and 767 transitions. Word has length 549 [2021-10-21 19:55:14,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:14,853 INFO L470 AbstractCegarLoop]: Abstraction has 754 states and 767 transitions. [2021-10-21 19:55:14,854 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 8.571428571428571) internal successors, (180), 20 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:55:14,854 INFO L276 IsEmpty]: Start isEmpty. Operand 754 states and 767 transitions. [2021-10-21 19:55:14,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 618 [2021-10-21 19:55:14,857 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:14,858 INFO L512 BasicCegarLoop]: trace histogram [180, 180, 180, 9, 9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:55:14,884 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-10-21 19:55:15,058 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2021-10-21 19:55:15,058 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:15,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:15,059 INFO L82 PathProgramCache]: Analyzing trace with hash -415039993, now seen corresponding path program 8 times [2021-10-21 19:55:15,059 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:15,059 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823866535] [2021-10-21 19:55:15,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:15,059 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:15,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:55:15,393 INFO L134 CoverageAnalysis]: Checked inductivity of 50238 backedges. 16 proven. 44912 refuted. 0 times theorem prover too weak. 5310 trivial. 0 not checked. [2021-10-21 19:55:15,394 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:15,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823866535] [2021-10-21 19:55:15,394 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1823866535] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:15,394 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788382930] [2021-10-21 19:55:15,395 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:55:15,395 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:15,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:15,396 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:15,399 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-10-21 19:55:18,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:55:18,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:55:18,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 979 conjuncts, 12 conjunts are in the unsatisfiable core [2021-10-21 19:55:18,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:21,259 INFO L134 CoverageAnalysis]: Checked inductivity of 50238 backedges. 16 proven. 44912 refuted. 0 times theorem prover too weak. 5310 trivial. 0 not checked. [2021-10-21 19:55:21,260 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788382930] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:21,260 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:55:21,260 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 22 [2021-10-21 19:55:21,261 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615551202] [2021-10-21 19:55:21,261 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-10-21 19:55:21,262 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:21,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-10-21 19:55:21,262 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=208, Invalid=298, Unknown=0, NotChecked=0, Total=506 [2021-10-21 19:55:21,263 INFO L87 Difference]: Start difference. First operand 754 states and 767 transitions. Second operand has 23 states, 23 states have (on average 8.782608695652174) internal successors, (202), 22 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:55:21,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:21,407 INFO L93 Difference]: Finished difference Result 892 states and 909 transitions. [2021-10-21 19:55:21,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-10-21 19:55:21,407 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 8.782608695652174) internal successors, (202), 22 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 617 [2021-10-21 19:55:21,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:21,410 INFO L225 Difference]: With dead ends: 892 [2021-10-21 19:55:21,410 INFO L226 Difference]: Without dead ends: 822 [2021-10-21 19:55:21,411 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 628 GetRequests, 607 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 146.5ms TimeCoverageRelationStatistics Valid=208, Invalid=298, Unknown=0, NotChecked=0, Total=506 [2021-10-21 19:55:21,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 822 states. [2021-10-21 19:55:21,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 822 to 822. [2021-10-21 19:55:21,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 822 states, 821 states have (on average 1.0182704019488429) internal successors, (836), 821 states have internal predecessors, (836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:55:21,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 822 states to 822 states and 836 transitions. [2021-10-21 19:55:21,450 INFO L78 Accepts]: Start accepts. Automaton has 822 states and 836 transitions. Word has length 617 [2021-10-21 19:55:21,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:21,450 INFO L470 AbstractCegarLoop]: Abstraction has 822 states and 836 transitions. [2021-10-21 19:55:21,450 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 8.782608695652174) internal successors, (202), 22 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:55:21,450 INFO L276 IsEmpty]: Start isEmpty. Operand 822 states and 836 transitions. [2021-10-21 19:55:21,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 686 [2021-10-21 19:55:21,456 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:21,456 INFO L512 BasicCegarLoop]: trace histogram [200, 200, 200, 10, 10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:55:21,500 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-10-21 19:55:21,684 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-10-21 19:55:21,684 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:21,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:21,684 INFO L82 PathProgramCache]: Analyzing trace with hash -758293429, now seen corresponding path program 9 times [2021-10-21 19:55:21,685 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:21,685 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1119310450] [2021-10-21 19:55:21,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:21,685 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:21,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:55:22,004 INFO L134 CoverageAnalysis]: Checked inductivity of 62060 backedges. 18 proven. 56142 refuted. 0 times theorem prover too weak. 5900 trivial. 0 not checked. [2021-10-21 19:55:22,004 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:22,004 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1119310450] [2021-10-21 19:55:22,004 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1119310450] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:22,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1005245770] [2021-10-21 19:55:22,005 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:55:22,005 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:22,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:22,006 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:22,026 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-10-21 19:55:25,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 69 check-sat command(s) [2021-10-21 19:55:25,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:55:25,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 661 conjuncts, 13 conjunts are in the unsatisfiable core [2021-10-21 19:55:25,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:29,072 INFO L134 CoverageAnalysis]: Checked inductivity of 62060 backedges. 18 proven. 56142 refuted. 0 times theorem prover too weak. 5900 trivial. 0 not checked. [2021-10-21 19:55:29,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1005245770] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:29,073 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:55:29,073 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 24 [2021-10-21 19:55:29,073 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456471856] [2021-10-21 19:55:29,074 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-10-21 19:55:29,075 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:29,075 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-10-21 19:55:29,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=245, Invalid=355, Unknown=0, NotChecked=0, Total=600 [2021-10-21 19:55:29,076 INFO L87 Difference]: Start difference. First operand 822 states and 836 transitions. Second operand has 25 states, 25 states have (on average 8.96) internal successors, (224), 24 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:55:29,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:29,205 INFO L93 Difference]: Finished difference Result 960 states and 978 transitions. [2021-10-21 19:55:29,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-21 19:55:29,205 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 8.96) internal successors, (224), 24 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 685 [2021-10-21 19:55:29,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:29,207 INFO L225 Difference]: With dead ends: 960 [2021-10-21 19:55:29,207 INFO L226 Difference]: Without dead ends: 890 [2021-10-21 19:55:29,208 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 697 GetRequests, 674 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 171.7ms TimeCoverageRelationStatistics Valid=245, Invalid=355, Unknown=0, NotChecked=0, Total=600 [2021-10-21 19:55:29,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 890 states. [2021-10-21 19:55:29,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 890 to 890. [2021-10-21 19:55:29,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 890 states, 889 states have (on average 1.0179977502812148) internal successors, (905), 889 states have internal predecessors, (905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:55:29,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 890 states to 890 states and 905 transitions. [2021-10-21 19:55:29,244 INFO L78 Accepts]: Start accepts. Automaton has 890 states and 905 transitions. Word has length 685 [2021-10-21 19:55:29,245 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:29,245 INFO L470 AbstractCegarLoop]: Abstraction has 890 states and 905 transitions. [2021-10-21 19:55:29,245 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 8.96) internal successors, (224), 24 states have internal predecessors, (224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:55:29,245 INFO L276 IsEmpty]: Start isEmpty. Operand 890 states and 905 transitions. [2021-10-21 19:55:29,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 754 [2021-10-21 19:55:29,251 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:29,251 INFO L512 BasicCegarLoop]: trace histogram [220, 220, 220, 11, 11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:55:29,284 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Forceful destruction successful, exit code 0 [2021-10-21 19:55:29,459 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:29,459 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:29,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:29,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1515005809, now seen corresponding path program 10 times [2021-10-21 19:55:29,460 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:29,460 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996697266] [2021-10-21 19:55:29,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:29,460 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:29,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:55:29,873 INFO L134 CoverageAnalysis]: Checked inductivity of 75130 backedges. 20 proven. 68620 refuted. 0 times theorem prover too weak. 6490 trivial. 0 not checked. [2021-10-21 19:55:29,874 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:29,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996697266] [2021-10-21 19:55:29,874 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996697266] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:29,874 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483455644] [2021-10-21 19:55:29,874 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:55:29,875 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:29,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:29,876 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:29,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-10-21 19:55:33,261 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:55:33,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:55:33,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 1142 conjuncts, 34 conjunts are in the unsatisfiable core [2021-10-21 19:55:33,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:37,613 INFO L134 CoverageAnalysis]: Checked inductivity of 75130 backedges. 552 proven. 68678 refuted. 0 times theorem prover too weak. 5900 trivial. 0 not checked. [2021-10-21 19:55:37,613 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1483455644] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:37,613 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:55:37,614 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 35] total 48 [2021-10-21 19:55:37,614 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290736328] [2021-10-21 19:55:37,615 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-10-21 19:55:37,615 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:37,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-10-21 19:55:37,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=539, Invalid=1717, Unknown=0, NotChecked=0, Total=2256 [2021-10-21 19:55:37,616 INFO L87 Difference]: Start difference. First operand 890 states and 905 transitions. Second operand has 48 states, 48 states have (on average 6.375) internal successors, (306), 48 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:55:38,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:38,080 INFO L93 Difference]: Finished difference Result 1029 states and 1048 transitions. [2021-10-21 19:55:38,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-10-21 19:55:38,080 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 6.375) internal successors, (306), 48 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 753 [2021-10-21 19:55:38,081 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:38,082 INFO L225 Difference]: With dead ends: 1029 [2021-10-21 19:55:38,082 INFO L226 Difference]: Without dead ends: 959 [2021-10-21 19:55:38,083 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 786 GetRequests, 720 SyntacticMatches, 0 SemanticMatches, 66 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 943 ImplicationChecksByTransitivity, 831.8ms TimeCoverageRelationStatistics Valid=1499, Invalid=3057, Unknown=0, NotChecked=0, Total=4556 [2021-10-21 19:55:38,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 959 states. [2021-10-21 19:55:38,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 959 to 958. [2021-10-21 19:55:38,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 958 states, 957 states have (on average 1.0177638453500522) internal successors, (974), 957 states have internal predecessors, (974), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:55:38,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 974 transitions. [2021-10-21 19:55:38,121 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 974 transitions. Word has length 753 [2021-10-21 19:55:38,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:38,122 INFO L470 AbstractCegarLoop]: Abstraction has 958 states and 974 transitions. [2021-10-21 19:55:38,122 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 6.375) internal successors, (306), 48 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:55:38,122 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 974 transitions. [2021-10-21 19:55:38,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 822 [2021-10-21 19:55:38,129 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:38,130 INFO L512 BasicCegarLoop]: trace histogram [240, 240, 240, 12, 12, 12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:55:38,177 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-10-21 19:55:38,344 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:38,344 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:38,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:38,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1900311251, now seen corresponding path program 11 times [2021-10-21 19:55:38,345 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:38,345 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390278508] [2021-10-21 19:55:38,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:38,345 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:38,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:55:38,849 INFO L134 CoverageAnalysis]: Checked inductivity of 89448 backedges. 22 proven. 82346 refuted. 0 times theorem prover too weak. 7080 trivial. 0 not checked. [2021-10-21 19:55:38,849 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:38,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390278508] [2021-10-21 19:55:38,850 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [390278508] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:38,850 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1109456906] [2021-10-21 19:55:38,850 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 19:55:38,850 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:38,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:38,851 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:38,868 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-10-21 19:55:43,278 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 110 check-sat command(s) [2021-10-21 19:55:43,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:55:43,286 INFO L263 TraceCheckSpWp]: Trace formula consists of 1285 conjuncts, 37 conjunts are in the unsatisfiable core [2021-10-21 19:55:43,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:48,130 INFO L134 CoverageAnalysis]: Checked inductivity of 89448 backedges. 592 proven. 82366 refuted. 0 times theorem prover too weak. 6490 trivial. 0 not checked. [2021-10-21 19:55:48,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1109456906] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:48,130 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:55:48,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 37] total 51 [2021-10-21 19:55:48,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765576196] [2021-10-21 19:55:48,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 51 states [2021-10-21 19:55:48,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:48,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 51 interpolants. [2021-10-21 19:55:48,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=606, Invalid=1944, Unknown=0, NotChecked=0, Total=2550 [2021-10-21 19:55:48,133 INFO L87 Difference]: Start difference. First operand 958 states and 974 transitions. Second operand has 51 states, 51 states have (on average 6.431372549019608) internal successors, (328), 51 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:55:48,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:48,991 INFO L93 Difference]: Finished difference Result 1097 states and 1117 transitions. [2021-10-21 19:55:48,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2021-10-21 19:55:48,991 INFO L78 Accepts]: Start accepts. Automaton has has 51 states, 51 states have (on average 6.431372549019608) internal successors, (328), 51 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 821 [2021-10-21 19:55:48,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:48,993 INFO L225 Difference]: With dead ends: 1097 [2021-10-21 19:55:48,993 INFO L226 Difference]: Without dead ends: 1027 [2021-10-21 19:55:48,994 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 876 GetRequests, 786 SyntacticMatches, 0 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1917 ImplicationChecksByTransitivity, 1156.8ms TimeCoverageRelationStatistics Valid=2887, Invalid=5485, Unknown=0, NotChecked=0, Total=8372 [2021-10-21 19:55:48,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1027 states. [2021-10-21 19:55:49,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1027 to 1026. [2021-10-21 19:55:49,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1026 states, 1025 states have (on average 1.0175609756097561) internal successors, (1043), 1025 states have internal predecessors, (1043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:55:49,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1026 states to 1026 states and 1043 transitions. [2021-10-21 19:55:49,034 INFO L78 Accepts]: Start accepts. Automaton has 1026 states and 1043 transitions. Word has length 821 [2021-10-21 19:55:49,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:49,034 INFO L470 AbstractCegarLoop]: Abstraction has 1026 states and 1043 transitions. [2021-10-21 19:55:49,034 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 51 states, 51 states have (on average 6.431372549019608) internal successors, (328), 51 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:55:49,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1026 states and 1043 transitions. [2021-10-21 19:55:49,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 890 [2021-10-21 19:55:49,042 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:49,043 INFO L512 BasicCegarLoop]: trace histogram [260, 260, 260, 13, 13, 13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:55:49,081 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-10-21 19:55:49,256 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-10-21 19:55:49,256 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:49,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:49,257 INFO L82 PathProgramCache]: Analyzing trace with hash 777202455, now seen corresponding path program 12 times [2021-10-21 19:55:49,257 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:49,257 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439460467] [2021-10-21 19:55:49,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:49,258 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:55:49,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:55:49,703 INFO L134 CoverageAnalysis]: Checked inductivity of 105014 backedges. 24 proven. 97320 refuted. 0 times theorem prover too weak. 7670 trivial. 0 not checked. [2021-10-21 19:55:49,703 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:55:49,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439460467] [2021-10-21 19:55:49,704 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439460467] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:49,704 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250624240] [2021-10-21 19:55:49,704 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 19:55:49,704 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:55:49,705 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:55:49,705 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:55:49,726 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-10-21 19:55:54,774 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 131 check-sat command(s) [2021-10-21 19:55:54,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:55:54,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 1387 conjuncts, 16 conjunts are in the unsatisfiable core [2021-10-21 19:55:54,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:55:59,475 INFO L134 CoverageAnalysis]: Checked inductivity of 105014 backedges. 24 proven. 97320 refuted. 0 times theorem prover too weak. 7670 trivial. 0 not checked. [2021-10-21 19:55:59,475 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1250624240] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:55:59,475 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:55:59,475 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 30 [2021-10-21 19:55:59,475 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421263634] [2021-10-21 19:55:59,476 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-10-21 19:55:59,476 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:55:59,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-10-21 19:55:59,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=374, Invalid=556, Unknown=0, NotChecked=0, Total=930 [2021-10-21 19:55:59,477 INFO L87 Difference]: Start difference. First operand 1026 states and 1043 transitions. Second operand has 31 states, 31 states have (on average 9.35483870967742) internal successors, (290), 30 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:55:59,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:55:59,632 INFO L93 Difference]: Finished difference Result 1164 states and 1185 transitions. [2021-10-21 19:55:59,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-21 19:55:59,632 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 9.35483870967742) internal successors, (290), 30 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 889 [2021-10-21 19:55:59,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:55:59,635 INFO L225 Difference]: With dead ends: 1164 [2021-10-21 19:55:59,635 INFO L226 Difference]: Without dead ends: 1094 [2021-10-21 19:55:59,636 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 904 GetRequests, 875 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 236.3ms TimeCoverageRelationStatistics Valid=374, Invalid=556, Unknown=0, NotChecked=0, Total=930 [2021-10-21 19:55:59,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1094 states. [2021-10-21 19:55:59,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1094 to 1094. [2021-10-21 19:55:59,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1094 states, 1093 states have (on average 1.0173833485818846) internal successors, (1112), 1093 states have internal predecessors, (1112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:55:59,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1094 states to 1094 states and 1112 transitions. [2021-10-21 19:55:59,696 INFO L78 Accepts]: Start accepts. Automaton has 1094 states and 1112 transitions. Word has length 889 [2021-10-21 19:55:59,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:55:59,697 INFO L470 AbstractCegarLoop]: Abstraction has 1094 states and 1112 transitions. [2021-10-21 19:55:59,697 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 9.35483870967742) internal successors, (290), 30 states have internal predecessors, (290), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:55:59,697 INFO L276 IsEmpty]: Start isEmpty. Operand 1094 states and 1112 transitions. [2021-10-21 19:55:59,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 958 [2021-10-21 19:55:59,703 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:55:59,703 INFO L512 BasicCegarLoop]: trace histogram [280, 280, 280, 14, 14, 14, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:55:59,737 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2021-10-21 19:55:59,904 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-10-21 19:55:59,904 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:55:59,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:55:59,904 INFO L82 PathProgramCache]: Analyzing trace with hash -47185573, now seen corresponding path program 13 times [2021-10-21 19:55:59,904 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:55:59,905 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311339143] [2021-10-21 19:55:59,905 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:55:59,905 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:56:00,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:56:00,521 INFO L134 CoverageAnalysis]: Checked inductivity of 121828 backedges. 26 proven. 113542 refuted. 0 times theorem prover too weak. 8260 trivial. 0 not checked. [2021-10-21 19:56:00,522 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:56:00,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311339143] [2021-10-21 19:56:00,522 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311339143] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:56:00,522 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405219594] [2021-10-21 19:56:00,522 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-21 19:56:00,523 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:56:00,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:56:00,524 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:56:00,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-10-21 19:56:05,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:56:05,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 1489 conjuncts, 17 conjunts are in the unsatisfiable core [2021-10-21 19:56:05,509 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:56:10,611 INFO L134 CoverageAnalysis]: Checked inductivity of 121828 backedges. 26 proven. 113542 refuted. 0 times theorem prover too weak. 8260 trivial. 0 not checked. [2021-10-21 19:56:10,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1405219594] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:56:10,612 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:56:10,612 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 32 [2021-10-21 19:56:10,612 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488250270] [2021-10-21 19:56:10,613 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-10-21 19:56:10,613 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:56:10,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-10-21 19:56:10,614 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=633, Unknown=0, NotChecked=0, Total=1056 [2021-10-21 19:56:10,614 INFO L87 Difference]: Start difference. First operand 1094 states and 1112 transitions. Second operand has 33 states, 33 states have (on average 9.454545454545455) internal successors, (312), 32 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:56:10,774 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:56:10,774 INFO L93 Difference]: Finished difference Result 1232 states and 1254 transitions. [2021-10-21 19:56:10,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-21 19:56:10,774 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 9.454545454545455) internal successors, (312), 32 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 957 [2021-10-21 19:56:10,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:56:10,777 INFO L225 Difference]: With dead ends: 1232 [2021-10-21 19:56:10,777 INFO L226 Difference]: Without dead ends: 1162 [2021-10-21 19:56:10,778 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 973 GetRequests, 942 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 417 ImplicationChecksByTransitivity, 284.3ms TimeCoverageRelationStatistics Valid=423, Invalid=633, Unknown=0, NotChecked=0, Total=1056 [2021-10-21 19:56:10,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1162 states. [2021-10-21 19:56:10,838 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1162 to 1162. [2021-10-21 19:56:10,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1162 states, 1161 states have (on average 1.0172265288544358) internal successors, (1181), 1161 states have internal predecessors, (1181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:56:10,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1162 states to 1162 states and 1181 transitions. [2021-10-21 19:56:10,841 INFO L78 Accepts]: Start accepts. Automaton has 1162 states and 1181 transitions. Word has length 957 [2021-10-21 19:56:10,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:56:10,841 INFO L470 AbstractCegarLoop]: Abstraction has 1162 states and 1181 transitions. [2021-10-21 19:56:10,841 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 9.454545454545455) internal successors, (312), 32 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:56:10,841 INFO L276 IsEmpty]: Start isEmpty. Operand 1162 states and 1181 transitions. [2021-10-21 19:56:10,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1026 [2021-10-21 19:56:10,847 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:56:10,847 INFO L512 BasicCegarLoop]: trace histogram [300, 300, 300, 15, 15, 15, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:56:10,881 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-10-21 19:56:11,048 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-10-21 19:56:11,048 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:56:11,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:56:11,049 INFO L82 PathProgramCache]: Analyzing trace with hash 1705768351, now seen corresponding path program 14 times [2021-10-21 19:56:11,049 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:56:11,049 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894400638] [2021-10-21 19:56:11,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:56:11,049 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:56:11,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:56:11,645 INFO L134 CoverageAnalysis]: Checked inductivity of 139890 backedges. 28 proven. 131012 refuted. 0 times theorem prover too weak. 8850 trivial. 0 not checked. [2021-10-21 19:56:11,645 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:56:11,645 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894400638] [2021-10-21 19:56:11,645 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894400638] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:56:11,646 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566789473] [2021-10-21 19:56:11,646 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-21 19:56:11,646 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:56:11,646 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:56:11,648 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:56:11,664 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-10-21 19:56:17,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-21 19:56:17,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:56:17,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 1591 conjuncts, 18 conjunts are in the unsatisfiable core [2021-10-21 19:56:17,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:56:22,796 INFO L134 CoverageAnalysis]: Checked inductivity of 139890 backedges. 28 proven. 131012 refuted. 0 times theorem prover too weak. 8850 trivial. 0 not checked. [2021-10-21 19:56:22,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566789473] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:56:22,796 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:56:22,797 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 34 [2021-10-21 19:56:22,797 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [215460491] [2021-10-21 19:56:22,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-10-21 19:56:22,798 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:56:22,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-10-21 19:56:22,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=475, Invalid=715, Unknown=0, NotChecked=0, Total=1190 [2021-10-21 19:56:22,798 INFO L87 Difference]: Start difference. First operand 1162 states and 1181 transitions. Second operand has 35 states, 35 states have (on average 9.542857142857143) internal successors, (334), 34 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:56:22,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:56:22,967 INFO L93 Difference]: Finished difference Result 1300 states and 1323 transitions. [2021-10-21 19:56:22,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-21 19:56:22,968 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 9.542857142857143) internal successors, (334), 34 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1025 [2021-10-21 19:56:22,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:56:22,970 INFO L225 Difference]: With dead ends: 1300 [2021-10-21 19:56:22,970 INFO L226 Difference]: Without dead ends: 1230 [2021-10-21 19:56:22,970 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1042 GetRequests, 1009 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 299.1ms TimeCoverageRelationStatistics Valid=475, Invalid=715, Unknown=0, NotChecked=0, Total=1190 [2021-10-21 19:56:22,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1230 states. [2021-10-21 19:56:23,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1230 to 1230. [2021-10-21 19:56:23,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1230 states, 1229 states have (on average 1.017087062652563) internal successors, (1250), 1229 states have internal predecessors, (1250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:56:23,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1230 states to 1230 states and 1250 transitions. [2021-10-21 19:56:23,020 INFO L78 Accepts]: Start accepts. Automaton has 1230 states and 1250 transitions. Word has length 1025 [2021-10-21 19:56:23,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:56:23,021 INFO L470 AbstractCegarLoop]: Abstraction has 1230 states and 1250 transitions. [2021-10-21 19:56:23,021 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 9.542857142857143) internal successors, (334), 34 states have internal predecessors, (334), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:56:23,021 INFO L276 IsEmpty]: Start isEmpty. Operand 1230 states and 1250 transitions. [2021-10-21 19:56:23,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1094 [2021-10-21 19:56:23,028 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:56:23,028 INFO L512 BasicCegarLoop]: trace histogram [320, 320, 320, 16, 16, 16, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:56:23,067 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2021-10-21 19:56:23,229 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-10-21 19:56:23,229 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:56:23,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:56:23,229 INFO L82 PathProgramCache]: Analyzing trace with hash -1760032797, now seen corresponding path program 15 times [2021-10-21 19:56:23,229 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:56:23,230 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22098754] [2021-10-21 19:56:23,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:56:23,230 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:56:23,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:56:23,942 INFO L134 CoverageAnalysis]: Checked inductivity of 159200 backedges. 30 proven. 149730 refuted. 0 times theorem prover too weak. 9440 trivial. 0 not checked. [2021-10-21 19:56:23,942 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:56:23,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22098754] [2021-10-21 19:56:23,943 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22098754] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:56:23,943 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427575936] [2021-10-21 19:56:23,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-21 19:56:23,943 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:56:23,943 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:56:23,944 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:56:23,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-10-21 19:56:30,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 134 check-sat command(s) [2021-10-21 19:56:30,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:56:30,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 1465 conjuncts, 19 conjunts are in the unsatisfiable core [2021-10-21 19:56:30,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:56:36,557 INFO L134 CoverageAnalysis]: Checked inductivity of 159200 backedges. 30 proven. 149730 refuted. 0 times theorem prover too weak. 9440 trivial. 0 not checked. [2021-10-21 19:56:36,557 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1427575936] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:56:36,557 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:56:36,558 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 36 [2021-10-21 19:56:36,558 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [626703133] [2021-10-21 19:56:36,559 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-10-21 19:56:36,559 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:56:36,559 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-10-21 19:56:36,559 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=530, Invalid=802, Unknown=0, NotChecked=0, Total=1332 [2021-10-21 19:56:36,559 INFO L87 Difference]: Start difference. First operand 1230 states and 1250 transitions. Second operand has 37 states, 37 states have (on average 9.621621621621621) internal successors, (356), 36 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:56:36,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:56:36,746 INFO L93 Difference]: Finished difference Result 1368 states and 1392 transitions. [2021-10-21 19:56:36,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-10-21 19:56:36,747 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 9.621621621621621) internal successors, (356), 36 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1093 [2021-10-21 19:56:36,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:56:36,749 INFO L225 Difference]: With dead ends: 1368 [2021-10-21 19:56:36,750 INFO L226 Difference]: Without dead ends: 1298 [2021-10-21 19:56:36,750 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1111 GetRequests, 1076 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 335.7ms TimeCoverageRelationStatistics Valid=530, Invalid=802, Unknown=0, NotChecked=0, Total=1332 [2021-10-21 19:56:36,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1298 states. [2021-10-21 19:56:36,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1298 to 1298. [2021-10-21 19:56:36,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1298 states, 1297 states have (on average 1.0169622205088666) internal successors, (1319), 1297 states have internal predecessors, (1319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:56:36,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1298 states to 1298 states and 1319 transitions. [2021-10-21 19:56:36,801 INFO L78 Accepts]: Start accepts. Automaton has 1298 states and 1319 transitions. Word has length 1093 [2021-10-21 19:56:36,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:56:36,802 INFO L470 AbstractCegarLoop]: Abstraction has 1298 states and 1319 transitions. [2021-10-21 19:56:36,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 9.621621621621621) internal successors, (356), 36 states have internal predecessors, (356), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:56:36,802 INFO L276 IsEmpty]: Start isEmpty. Operand 1298 states and 1319 transitions. [2021-10-21 19:56:36,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1162 [2021-10-21 19:56:36,809 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:56:36,810 INFO L512 BasicCegarLoop]: trace histogram [340, 340, 340, 17, 17, 17, 17, 17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:56:36,849 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-10-21 19:56:37,010 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:56:37,010 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:56:37,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:56:37,011 INFO L82 PathProgramCache]: Analyzing trace with hash -1471858649, now seen corresponding path program 16 times [2021-10-21 19:56:37,011 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:56:37,011 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195360097] [2021-10-21 19:56:37,011 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:56:37,011 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:56:37,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:56:37,759 INFO L134 CoverageAnalysis]: Checked inductivity of 179758 backedges. 32 proven. 169696 refuted. 0 times theorem prover too weak. 10030 trivial. 0 not checked. [2021-10-21 19:56:37,760 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:56:37,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195360097] [2021-10-21 19:56:37,760 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195360097] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:56:37,760 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785254337] [2021-10-21 19:56:37,761 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-21 19:56:37,761 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:56:37,761 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:56:37,764 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:56:37,786 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-10-21 19:56:44,380 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-21 19:56:44,381 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:56:44,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 1754 conjuncts, 40 conjunts are in the unsatisfiable core [2021-10-21 19:56:44,395 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:56:51,208 INFO L134 CoverageAnalysis]: Checked inductivity of 179758 backedges. 564 proven. 169754 refuted. 0 times theorem prover too weak. 9440 trivial. 0 not checked. [2021-10-21 19:56:51,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785254337] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:56:51,208 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:56:51,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 41] total 60 [2021-10-21 19:56:51,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1185113999] [2021-10-21 19:56:51,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2021-10-21 19:56:51,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:56:51,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2021-10-21 19:56:51,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=842, Invalid=2698, Unknown=0, NotChecked=0, Total=3540 [2021-10-21 19:56:51,211 INFO L87 Difference]: Start difference. First operand 1298 states and 1319 transitions. Second operand has 60 states, 60 states have (on average 7.3) internal successors, (438), 60 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:56:51,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:56:51,735 INFO L93 Difference]: Finished difference Result 1437 states and 1462 transitions. [2021-10-21 19:56:51,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-10-21 19:56:51,735 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 7.3) internal successors, (438), 60 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1161 [2021-10-21 19:56:51,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:56:51,737 INFO L225 Difference]: With dead ends: 1437 [2021-10-21 19:56:51,737 INFO L226 Difference]: Without dead ends: 1367 [2021-10-21 19:56:51,738 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1200 GetRequests, 1122 SyntacticMatches, 0 SemanticMatches, 78 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1537 ImplicationChecksByTransitivity, 1121.3ms TimeCoverageRelationStatistics Valid=2042, Invalid=4278, Unknown=0, NotChecked=0, Total=6320 [2021-10-21 19:56:51,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1367 states. [2021-10-21 19:56:51,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1367 to 1366. [2021-10-21 19:56:51,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1366 states, 1365 states have (on average 1.0168498168498168) internal successors, (1388), 1365 states have internal predecessors, (1388), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:56:51,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1366 states to 1366 states and 1388 transitions. [2021-10-21 19:56:51,791 INFO L78 Accepts]: Start accepts. Automaton has 1366 states and 1388 transitions. Word has length 1161 [2021-10-21 19:56:51,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:56:51,791 INFO L470 AbstractCegarLoop]: Abstraction has 1366 states and 1388 transitions. [2021-10-21 19:56:51,791 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 7.3) internal successors, (438), 60 states have internal predecessors, (438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:56:51,792 INFO L276 IsEmpty]: Start isEmpty. Operand 1366 states and 1388 transitions. [2021-10-21 19:56:51,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1230 [2021-10-21 19:56:51,799 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:56:51,800 INFO L512 BasicCegarLoop]: trace histogram [360, 360, 360, 18, 18, 18, 18, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:56:51,842 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-10-21 19:56:52,000 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:56:52,000 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:56:52,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:56:52,001 INFO L82 PathProgramCache]: Analyzing trace with hash -679180693, now seen corresponding path program 17 times [2021-10-21 19:56:52,001 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:56:52,001 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448374481] [2021-10-21 19:56:52,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:56:52,001 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:56:52,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:56:52,863 INFO L134 CoverageAnalysis]: Checked inductivity of 201564 backedges. 34 proven. 190910 refuted. 0 times theorem prover too weak. 10620 trivial. 0 not checked. [2021-10-21 19:56:52,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:56:52,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448374481] [2021-10-21 19:56:52,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1448374481] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:56:52,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349916057] [2021-10-21 19:56:52,863 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-21 19:56:52,863 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:56:52,864 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:56:52,864 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:56:52,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-10-21 19:57:01,363 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 156 check-sat command(s) [2021-10-21 19:57:01,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:57:01,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 1897 conjuncts, 43 conjunts are in the unsatisfiable core [2021-10-21 19:57:01,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:57:07,958 INFO L134 CoverageAnalysis]: Checked inductivity of 201564 backedges. 604 proven. 190930 refuted. 0 times theorem prover too weak. 10030 trivial. 0 not checked. [2021-10-21 19:57:07,958 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349916057] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:57:07,959 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:57:07,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 43] total 63 [2021-10-21 19:57:07,960 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232202178] [2021-10-21 19:57:07,961 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 63 states [2021-10-21 19:57:07,961 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:57:07,962 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 63 interpolants. [2021-10-21 19:57:07,962 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=891, Invalid=3015, Unknown=0, NotChecked=0, Total=3906 [2021-10-21 19:57:07,963 INFO L87 Difference]: Start difference. First operand 1366 states and 1388 transitions. Second operand has 63 states, 63 states have (on average 7.301587301587301) internal successors, (460), 63 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:57:09,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:57:09,287 INFO L93 Difference]: Finished difference Result 1505 states and 1531 transitions. [2021-10-21 19:57:09,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 82 states. [2021-10-21 19:57:09,287 INFO L78 Accepts]: Start accepts. Automaton has has 63 states, 63 states have (on average 7.301587301587301) internal successors, (460), 63 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1229 [2021-10-21 19:57:09,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:57:09,289 INFO L225 Difference]: With dead ends: 1505 [2021-10-21 19:57:09,289 INFO L226 Difference]: Without dead ends: 1435 [2021-10-21 19:57:09,291 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1311 GetRequests, 1188 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4019 ImplicationChecksByTransitivity, 1701.1ms TimeCoverageRelationStatistics Valid=5366, Invalid=10134, Unknown=0, NotChecked=0, Total=15500 [2021-10-21 19:57:09,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1435 states. [2021-10-21 19:57:09,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1435 to 1434. [2021-10-21 19:57:09,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1434 states, 1433 states have (on average 1.0167480809490579) internal successors, (1457), 1433 states have internal predecessors, (1457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:57:09,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1434 states to 1434 states and 1457 transitions. [2021-10-21 19:57:09,361 INFO L78 Accepts]: Start accepts. Automaton has 1434 states and 1457 transitions. Word has length 1229 [2021-10-21 19:57:09,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:57:09,362 INFO L470 AbstractCegarLoop]: Abstraction has 1434 states and 1457 transitions. [2021-10-21 19:57:09,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 63 states, 63 states have (on average 7.301587301587301) internal successors, (460), 63 states have internal predecessors, (460), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:57:09,362 INFO L276 IsEmpty]: Start isEmpty. Operand 1434 states and 1457 transitions. [2021-10-21 19:57:09,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1298 [2021-10-21 19:57:09,376 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:57:09,377 INFO L512 BasicCegarLoop]: trace histogram [380, 380, 380, 19, 19, 19, 19, 19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:57:09,447 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Forceful destruction successful, exit code 0 [2021-10-21 19:57:09,596 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2021-10-21 19:57:09,596 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:57:09,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:57:09,596 INFO L82 PathProgramCache]: Analyzing trace with hash -895028561, now seen corresponding path program 18 times [2021-10-21 19:57:09,597 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:57:09,597 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477718966] [2021-10-21 19:57:09,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:57:09,597 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:57:09,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-21 19:57:10,379 INFO L134 CoverageAnalysis]: Checked inductivity of 224618 backedges. 36 proven. 213372 refuted. 0 times theorem prover too weak. 11210 trivial. 0 not checked. [2021-10-21 19:57:10,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-21 19:57:10,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477718966] [2021-10-21 19:57:10,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477718966] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:57:10,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159701653] [2021-10-21 19:57:10,380 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-21 19:57:10,381 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:57:10,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 [2021-10-21 19:57:10,384 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-21 19:57:10,402 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-10-21 19:57:19,457 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 139 check-sat command(s) [2021-10-21 19:57:19,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-21 19:57:19,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 1535 conjuncts, 22 conjunts are in the unsatisfiable core [2021-10-21 19:57:19,471 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-21 19:57:26,306 INFO L134 CoverageAnalysis]: Checked inductivity of 224618 backedges. 36 proven. 213372 refuted. 0 times theorem prover too weak. 11210 trivial. 0 not checked. [2021-10-21 19:57:26,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159701653] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-21 19:57:26,306 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-21 19:57:26,307 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 42 [2021-10-21 19:57:26,307 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504639196] [2021-10-21 19:57:26,308 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2021-10-21 19:57:26,308 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-21 19:57:26,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2021-10-21 19:57:26,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=713, Invalid=1093, Unknown=0, NotChecked=0, Total=1806 [2021-10-21 19:57:26,309 INFO L87 Difference]: Start difference. First operand 1434 states and 1457 transitions. Second operand has 43 states, 43 states have (on average 9.813953488372093) internal successors, (422), 42 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:57:26,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-21 19:57:26,540 INFO L93 Difference]: Finished difference Result 1572 states and 1599 transitions. [2021-10-21 19:57:26,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-21 19:57:26,541 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 9.813953488372093) internal successors, (422), 42 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 1297 [2021-10-21 19:57:26,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-21 19:57:26,543 INFO L225 Difference]: With dead ends: 1572 [2021-10-21 19:57:26,543 INFO L226 Difference]: Without dead ends: 1502 [2021-10-21 19:57:26,543 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 1318 GetRequests, 1277 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 757 ImplicationChecksByTransitivity, 433.4ms TimeCoverageRelationStatistics Valid=713, Invalid=1093, Unknown=0, NotChecked=0, Total=1806 [2021-10-21 19:57:26,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1502 states. [2021-10-21 19:57:26,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1502 to 1502. [2021-10-21 19:57:26,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1502 states, 1501 states have (on average 1.016655562958028) internal successors, (1526), 1501 states have internal predecessors, (1526), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:57:26,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1502 states to 1502 states and 1526 transitions. [2021-10-21 19:57:26,600 INFO L78 Accepts]: Start accepts. Automaton has 1502 states and 1526 transitions. Word has length 1297 [2021-10-21 19:57:26,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-21 19:57:26,600 INFO L470 AbstractCegarLoop]: Abstraction has 1502 states and 1526 transitions. [2021-10-21 19:57:26,601 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 9.813953488372093) internal successors, (422), 42 states have internal predecessors, (422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-21 19:57:26,601 INFO L276 IsEmpty]: Start isEmpty. Operand 1502 states and 1526 transitions. [2021-10-21 19:57:26,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1366 [2021-10-21 19:57:26,610 INFO L504 BasicCegarLoop]: Found error trace [2021-10-21 19:57:26,610 INFO L512 BasicCegarLoop]: trace histogram [400, 400, 400, 20, 20, 20, 20, 20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2021-10-21 19:57:26,655 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-10-21 19:57:26,811 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-21 19:57:26,811 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-10-21 19:57:26,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-21 19:57:26,811 INFO L82 PathProgramCache]: Analyzing trace with hash -822248205, now seen corresponding path program 19 times [2021-10-21 19:57:26,811 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-21 19:57:26,812 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996495674] [2021-10-21 19:57:26,812 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-21 19:57:26,812 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-21 19:57:27,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:57:27,170 INFO L354 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2021-10-21 19:57:27,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2021-10-21 19:57:28,246 INFO L133 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2021-10-21 19:57:28,246 INFO L626 BasicCegarLoop]: Counterexample is feasible [2021-10-21 19:57:28,247 INFO L764 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-21 19:57:28,249 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2021-10-21 19:57:28,257 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-21 19:57:28,689 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 07:57:28 BoogieIcfgContainer [2021-10-21 19:57:28,690 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-21 19:57:28,690 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-21 19:57:28,690 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-21 19:57:28,691 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-21 19:57:28,691 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 07:53:34" (3/4) ... [2021-10-21 19:57:28,693 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2021-10-21 19:57:29,221 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/witness.graphml [2021-10-21 19:57:29,221 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-21 19:57:29,222 INFO L168 Benchmark]: Toolchain (without parser) took 235121.60 ms. Allocated memory was 90.2 MB in the beginning and 1.9 GB in the end (delta: 1.8 GB). Free memory was 56.2 MB in the beginning and 644.1 MB in the end (delta: -587.9 MB). Peak memory consumption was 1.5 GB. Max. memory is 16.1 GB. [2021-10-21 19:57:29,223 INFO L168 Benchmark]: CDTParser took 0.69 ms. Allocated memory is still 90.2 MB. Free memory was 60.0 MB in the beginning and 60.0 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-21 19:57:29,224 INFO L168 Benchmark]: CACSL2BoogieTranslator took 269.52 ms. Allocated memory was 90.2 MB in the beginning and 117.4 MB in the end (delta: 27.3 MB). Free memory was 55.9 MB in the beginning and 93.5 MB in the end (delta: -37.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. [2021-10-21 19:57:29,224 INFO L168 Benchmark]: Boogie Procedure Inliner took 33.71 ms. Allocated memory is still 117.4 MB. Free memory was 93.5 MB in the beginning and 92.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:57:29,224 INFO L168 Benchmark]: Boogie Preprocessor took 22.38 ms. Allocated memory is still 117.4 MB. Free memory was 92.0 MB in the beginning and 90.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:57:29,225 INFO L168 Benchmark]: RCFGBuilder took 371.99 ms. Allocated memory is still 117.4 MB. Free memory was 90.7 MB in the beginning and 80.2 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-21 19:57:29,225 INFO L168 Benchmark]: TraceAbstraction took 233885.03 ms. Allocated memory was 117.4 MB in the beginning and 1.9 GB in the end (delta: 1.8 GB). Free memory was 80.2 MB in the beginning and 421.9 MB in the end (delta: -341.7 MB). Peak memory consumption was 1.6 GB. Max. memory is 16.1 GB. [2021-10-21 19:57:29,225 INFO L168 Benchmark]: Witness Printer took 530.81 ms. Allocated memory is still 1.9 GB. Free memory was 421.9 MB in the beginning and 644.1 MB in the end (delta: -222.2 MB). Peak memory consumption was 86.1 MB. Max. memory is 16.1 GB. [2021-10-21 19:57:29,228 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.69 ms. Allocated memory is still 90.2 MB. Free memory was 60.0 MB in the beginning and 60.0 MB in the end (delta: 21.2 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 269.52 ms. Allocated memory was 90.2 MB in the beginning and 117.4 MB in the end (delta: 27.3 MB). Free memory was 55.9 MB in the beginning and 93.5 MB in the end (delta: -37.6 MB). Peak memory consumption was 8.4 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 33.71 ms. Allocated memory is still 117.4 MB. Free memory was 93.5 MB in the beginning and 92.0 MB in the end (delta: 1.5 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 22.38 ms. Allocated memory is still 117.4 MB. Free memory was 92.0 MB in the beginning and 90.7 MB in the end (delta: 1.3 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 371.99 ms. Allocated memory is still 117.4 MB. Free memory was 90.7 MB in the beginning and 80.2 MB in the end (delta: 10.5 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 233885.03 ms. Allocated memory was 117.4 MB in the beginning and 1.9 GB in the end (delta: 1.8 GB). Free memory was 80.2 MB in the beginning and 421.9 MB in the end (delta: -341.7 MB). Peak memory consumption was 1.6 GB. Max. memory is 16.1 GB. * Witness Printer took 530.81 ms. Allocated memory is still 1.9 GB. Free memory was 421.9 MB in the beginning and 644.1 MB in the end (delta: -222.2 MB). Peak memory consumption was 86.1 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 - CounterExampleResult [Line: 12]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L9] int last ; [L18] int SIZE = 20; VAL [last=0, SIZE=20] [L20] last = __VERIFIER_nondet_int() [L6] COND FALSE !(!cond) VAL [last=22, SIZE=20] [L22] int a=0,b=0,c=0,st=0,d=0; VAL [last=22, SIZE=20] [L23] COND TRUE 1 [L24] st=1 [L25] c=0 VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND FALSE !(c=SIZE [L35] d++ VAL [last=22, SIZE=20] [L37] COND FALSE !(d == SIZE) VAL [last=22, SIZE=20] [L11] COND FALSE !(!(cond)) VAL [last=22, SIZE=20] [L23] COND TRUE 1 [L24] st=1 [L25] c=0 VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND FALSE !(c=SIZE [L35] d++ VAL [last=22, SIZE=20] [L37] COND FALSE !(d == SIZE) VAL [last=22, SIZE=20] [L11] COND FALSE !(!(cond)) VAL [last=22, SIZE=20] [L23] COND TRUE 1 [L24] st=1 [L25] c=0 VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND FALSE !(c=SIZE [L35] d++ VAL [last=22, SIZE=20] [L37] COND FALSE !(d == SIZE) VAL [last=22, SIZE=20] [L11] COND FALSE !(!(cond)) VAL [last=22, SIZE=20] [L23] COND TRUE 1 [L24] st=1 [L25] c=0 VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND FALSE !(c=SIZE [L35] d++ VAL [last=22, SIZE=20] [L37] COND FALSE !(d == SIZE) VAL [last=22, SIZE=20] [L11] COND FALSE !(!(cond)) VAL [last=22, SIZE=20] [L23] COND TRUE 1 [L24] st=1 [L25] c=0 VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND FALSE !(c=SIZE [L35] d++ VAL [last=22, SIZE=20] [L37] COND FALSE !(d == SIZE) VAL [last=22, SIZE=20] [L11] COND FALSE !(!(cond)) VAL [last=22, SIZE=20] [L23] COND TRUE 1 [L24] st=1 [L25] c=0 VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND FALSE !(c=SIZE [L35] d++ VAL [last=22, SIZE=20] [L37] COND FALSE !(d == SIZE) VAL [last=22, SIZE=20] [L11] COND FALSE !(!(cond)) VAL [last=22, SIZE=20] [L23] COND TRUE 1 [L24] st=1 [L25] c=0 VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND FALSE !(c=SIZE [L35] d++ VAL [last=22, SIZE=20] [L37] COND FALSE !(d == SIZE) VAL [last=22, SIZE=20] [L11] COND FALSE !(!(cond)) VAL [last=22, SIZE=20] [L23] COND TRUE 1 [L24] st=1 [L25] c=0 VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND FALSE !(c=SIZE [L35] d++ VAL [last=22, SIZE=20] [L37] COND FALSE !(d == SIZE) VAL [last=22, SIZE=20] [L11] COND FALSE !(!(cond)) VAL [last=22, SIZE=20] [L23] COND TRUE 1 [L24] st=1 [L25] c=0 VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND FALSE !(c=SIZE [L35] d++ VAL [last=22, SIZE=20] [L37] COND FALSE !(d == SIZE) VAL [last=22, SIZE=20] [L11] COND FALSE !(!(cond)) VAL [last=22, SIZE=20] [L23] COND TRUE 1 [L24] st=1 [L25] c=0 VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND FALSE !(c=SIZE [L35] d++ VAL [last=22, SIZE=20] [L37] COND FALSE !(d == SIZE) VAL [last=22, SIZE=20] [L11] COND FALSE !(!(cond)) VAL [last=22, SIZE=20] [L23] COND TRUE 1 [L24] st=1 [L25] c=0 VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND FALSE !(c=SIZE [L35] d++ VAL [last=22, SIZE=20] [L37] COND FALSE !(d == SIZE) VAL [last=22, SIZE=20] [L11] COND FALSE !(!(cond)) VAL [last=22, SIZE=20] [L23] COND TRUE 1 [L24] st=1 [L25] c=0 VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND FALSE !(c=SIZE [L35] d++ VAL [last=22, SIZE=20] [L37] COND FALSE !(d == SIZE) VAL [last=22, SIZE=20] [L11] COND FALSE !(!(cond)) VAL [last=22, SIZE=20] [L23] COND TRUE 1 [L24] st=1 [L25] c=0 VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND FALSE !(c=SIZE [L35] d++ VAL [last=22, SIZE=20] [L37] COND FALSE !(d == SIZE) VAL [last=22, SIZE=20] [L11] COND FALSE !(!(cond)) VAL [last=22, SIZE=20] [L23] COND TRUE 1 [L24] st=1 [L25] c=0 VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND FALSE !(c=SIZE [L35] d++ VAL [last=22, SIZE=20] [L37] COND FALSE !(d == SIZE) VAL [last=22, SIZE=20] [L11] COND FALSE !(!(cond)) VAL [last=22, SIZE=20] [L23] COND TRUE 1 [L24] st=1 [L25] c=0 VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND FALSE !(c=SIZE [L35] d++ VAL [last=22, SIZE=20] [L37] COND FALSE !(d == SIZE) VAL [last=22, SIZE=20] [L11] COND FALSE !(!(cond)) VAL [last=22, SIZE=20] [L23] COND TRUE 1 [L24] st=1 [L25] c=0 VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND FALSE !(c=SIZE [L35] d++ VAL [last=22, SIZE=20] [L37] COND FALSE !(d == SIZE) VAL [last=22, SIZE=20] [L11] COND FALSE !(!(cond)) VAL [last=22, SIZE=20] [L23] COND TRUE 1 [L24] st=1 [L25] c=0 VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND FALSE !(c=SIZE [L35] d++ VAL [last=22, SIZE=20] [L37] COND FALSE !(d == SIZE) VAL [last=22, SIZE=20] [L11] COND FALSE !(!(cond)) VAL [last=22, SIZE=20] [L23] COND TRUE 1 [L24] st=1 [L25] c=0 VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND FALSE !(c=SIZE [L35] d++ VAL [last=22, SIZE=20] [L37] COND FALSE !(d == SIZE) VAL [last=22, SIZE=20] [L11] COND FALSE !(!(cond)) VAL [last=22, SIZE=20] [L23] COND TRUE 1 [L24] st=1 [L25] c=0 VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND FALSE !(c=SIZE [L35] d++ VAL [last=22, SIZE=20] [L37] COND FALSE !(d == SIZE) VAL [last=22, SIZE=20] [L11] COND FALSE !(!(cond)) VAL [last=22, SIZE=20] [L23] COND TRUE 1 [L24] st=1 [L25] c=0 VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND TRUE c=last) VAL [last=22, SIZE=20] [L25] c++ VAL [last=22, SIZE=20] [L25] COND FALSE !(c=SIZE [L35] d++ VAL [last=22, SIZE=20] [L37] COND TRUE d == SIZE [L38] a = 0 [L39] b = 1 VAL [last=22, SIZE=20] [L11] COND TRUE !(cond) VAL [last=22, SIZE=20] [L12] reach_error() VAL [last=22, SIZE=20] - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 20 locations, 1 error locations. Started 1 CEGAR loops. OverallTime: 233331.0ms, OverallIterations: 55, TraceHistogramMax: 400, EmptinessCheckTime: 168.6ms, AutomataDifference: 31919.5ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 10.3ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 756 SDtfs, 11102 SDslu, 3334 SDs, 0 SdLazy, 15137 SolverSat, 1694 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 7238.1ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 16863 GetRequests, 14566 SyntacticMatches, 2 SemanticMatches, 2295 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60073 ImplicationChecksByTransitivity, 32547.4ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=1714occurred in iteration=34, InterpolantAutomatonStates: 1514, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 3041.7ms AutomataMinimizationTime, 54 MinimizatonAttempts, 6839 StatesRemovedByMinimization, 42 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1168.0ms SsaConstructionTime, 8569.8ms SatisfiabilityAnalysisTime, 99452.6ms InterpolantComputationTime, 31971 NumberOfCodeBlocks, 30611 NumberOfCodeBlocksAsserted, 1089 NumberOfCheckSat, 30506 ConstructedInterpolants, 0 QuantifiedInterpolants, 178480 SizeOfPredicates, 133 NumberOfNonLiveVariables, 23583 ConjunctsInSsa, 800 ConjunctsInUnsatCore, 100 InterpolantComputations, 12 PerfectInterpolantSequences, 253176/3128819 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2021-10-21 19:57:29,339 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1711c28c-56fd-44ca-8b22-0a0a0e393b75/bin/uautomizer-j4sWxH34Be/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...