./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/loops-crafted-1/in-de52.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9ad7fb26 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/config/AutomizerReach.xml -i ../../sv-benchmarks/c/loops-crafted-1/in-de52.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU --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 9b751a069fbdcae3e94881bf50bfce280447c39410a7e3e609a38e97e353596d --- Real Ultimate output --- This is Ultimate 0.2.1-dev-9ad7fb2 [2021-11-02 23:08:31,407 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-11-02 23:08:31,411 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-11-02 23:08:31,485 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-11-02 23:08:31,486 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-11-02 23:08:31,491 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-11-02 23:08:31,494 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-11-02 23:08:31,499 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-11-02 23:08:31,502 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-11-02 23:08:31,511 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-11-02 23:08:31,512 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-11-02 23:08:31,515 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-11-02 23:08:31,516 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-11-02 23:08:31,519 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-11-02 23:08:31,523 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-11-02 23:08:31,529 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-11-02 23:08:31,531 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-11-02 23:08:31,533 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-11-02 23:08:31,536 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-11-02 23:08:31,546 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-11-02 23:08:31,549 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-11-02 23:08:31,551 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-11-02 23:08:31,555 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-11-02 23:08:31,557 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-11-02 23:08:31,568 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-11-02 23:08:31,568 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-11-02 23:08:31,569 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-11-02 23:08:31,572 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-11-02 23:08:31,573 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-11-02 23:08:31,575 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-11-02 23:08:31,575 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-11-02 23:08:31,577 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-11-02 23:08:31,579 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-11-02 23:08:31,581 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-11-02 23:08:31,583 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-11-02 23:08:31,583 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-11-02 23:08:31,584 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-11-02 23:08:31,585 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-11-02 23:08:31,585 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-11-02 23:08:31,586 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-11-02 23:08:31,587 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-11-02 23:08:31,588 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-11-02 23:08:31,644 INFO L113 SettingsManager]: Loading preferences was successful [2021-11-02 23:08:31,644 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-11-02 23:08:31,645 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-11-02 23:08:31,646 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-11-02 23:08:31,657 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-11-02 23:08:31,658 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-11-02 23:08:31,658 INFO L138 SettingsManager]: * Use SBE=true [2021-11-02 23:08:31,658 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-11-02 23:08:31,659 INFO L138 SettingsManager]: * sizeof long=4 [2021-11-02 23:08:31,659 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-11-02 23:08:31,660 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-11-02 23:08:31,661 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-11-02 23:08:31,661 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-11-02 23:08:31,661 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-11-02 23:08:31,662 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-11-02 23:08:31,662 INFO L138 SettingsManager]: * sizeof long double=12 [2021-11-02 23:08:31,662 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-11-02 23:08:31,663 INFO L138 SettingsManager]: * Use constant arrays=true [2021-11-02 23:08:31,663 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-11-02 23:08:31,663 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-11-02 23:08:31,663 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-11-02 23:08:31,664 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-11-02 23:08:31,664 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:08:31,664 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-11-02 23:08:31,665 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-11-02 23:08:31,665 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-11-02 23:08:31,665 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-11-02 23:08:31,666 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-11-02 23:08:31,666 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-11-02 23:08:31,668 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2021-11-02 23:08:31,668 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-11-02 23:08:31,669 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-11-02 23:08:31,669 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_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 9b751a069fbdcae3e94881bf50bfce280447c39410a7e3e609a38e97e353596d [2021-11-02 23:08:32,039 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-11-02 23:08:32,074 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-11-02 23:08:32,077 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-11-02 23:08:32,079 INFO L271 PluginConnector]: Initializing CDTParser... [2021-11-02 23:08:32,080 INFO L275 PluginConnector]: CDTParser initialized [2021-11-02 23:08:32,081 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/../../sv-benchmarks/c/loops-crafted-1/in-de52.c [2021-11-02 23:08:32,176 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/data/2db817310/3faf8671101247c988d383cbcb0d7948/FLAGdf0287992 [2021-11-02 23:08:32,747 INFO L306 CDTParser]: Found 1 translation units. [2021-11-02 23:08:32,748 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/sv-benchmarks/c/loops-crafted-1/in-de52.c [2021-11-02 23:08:32,762 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/data/2db817310/3faf8671101247c988d383cbcb0d7948/FLAGdf0287992 [2021-11-02 23:08:33,075 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/data/2db817310/3faf8671101247c988d383cbcb0d7948 [2021-11-02 23:08:33,079 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-11-02 23:08:33,080 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-11-02 23:08:33,097 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-11-02 23:08:33,098 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-11-02 23:08:33,104 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-11-02 23:08:33,105 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:08:33" (1/1) ... [2021-11-02 23:08:33,107 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@51b83e4b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:08:33, skipping insertion in model container [2021-11-02 23:08:33,107 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 11:08:33" (1/1) ... [2021-11-02 23:08:33,116 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-11-02 23:08:33,134 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-11-02 23:08:33,329 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_06bb99b7-0203-4261-a663-a546fb5ec92b/sv-benchmarks/c/loops-crafted-1/in-de52.c[368,381] [2021-11-02 23:08:33,370 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:08:33,379 INFO L203 MainTranslator]: Completed pre-run [2021-11-02 23:08:33,393 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_06bb99b7-0203-4261-a663-a546fb5ec92b/sv-benchmarks/c/loops-crafted-1/in-de52.c[368,381] [2021-11-02 23:08:33,400 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-11-02 23:08:33,416 INFO L208 MainTranslator]: Completed translation [2021-11-02 23:08:33,418 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:08:33 WrapperNode [2021-11-02 23:08:33,418 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-11-02 23:08:33,419 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-11-02 23:08:33,420 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-11-02 23:08:33,420 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-11-02 23:08:33,427 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:08:33" (1/1) ... [2021-11-02 23:08:33,435 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:08:33" (1/1) ... [2021-11-02 23:08:33,458 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-11-02 23:08:33,459 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-11-02 23:08:33,460 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-11-02 23:08:33,460 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-11-02 23:08:33,471 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:08:33" (1/1) ... [2021-11-02 23:08:33,472 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:08:33" (1/1) ... [2021-11-02 23:08:33,474 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:08:33" (1/1) ... [2021-11-02 23:08:33,474 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:08:33" (1/1) ... [2021-11-02 23:08:33,479 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:08:33" (1/1) ... [2021-11-02 23:08:33,485 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:08:33" (1/1) ... [2021-11-02 23:08:33,487 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:08:33" (1/1) ... [2021-11-02 23:08:33,490 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-11-02 23:08:33,491 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-11-02 23:08:33,491 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-11-02 23:08:33,491 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-11-02 23:08:33,492 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:08:33" (1/1) ... [2021-11-02 23:08:33,510 INFO L168 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-11-02 23:08:33,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:08:33,544 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-11-02 23:08:33,557 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-11-02 23:08:33,605 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-11-02 23:08:33,605 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-11-02 23:08:33,605 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-11-02 23:08:33,605 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-11-02 23:08:33,867 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-11-02 23:08:33,868 INFO L299 CfgBuilder]: Removed 11 assume(true) statements. [2021-11-02 23:08:33,870 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:08:33 BoogieIcfgContainer [2021-11-02 23:08:33,871 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-11-02 23:08:33,873 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-11-02 23:08:33,873 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-11-02 23:08:33,878 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-11-02 23:08:33,878 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 11:08:33" (1/3) ... [2021-11-02 23:08:33,879 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53ed27f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:08:33, skipping insertion in model container [2021-11-02 23:08:33,879 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 11:08:33" (2/3) ... [2021-11-02 23:08:33,880 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@53ed27f3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 11:08:33, skipping insertion in model container [2021-11-02 23:08:33,880 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 11:08:33" (3/3) ... [2021-11-02 23:08:33,882 INFO L111 eAbstractionObserver]: Analyzing ICFG in-de52.c [2021-11-02 23:08:33,889 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-11-02 23:08:33,890 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-11-02 23:08:33,951 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-11-02 23:08:33,960 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-11-02 23:08:33,961 INFO L340 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2021-11-02 23:08:34,006 INFO L276 IsEmpty]: Start isEmpty. Operand has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:34,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-02 23:08:34,012 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:34,013 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:34,014 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:34,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:34,021 INFO L85 PathProgramCache]: Analyzing trace with hash 62220644, now seen corresponding path program 1 times [2021-11-02 23:08:34,047 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:34,048 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418314196] [2021-11-02 23:08:34,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:34,049 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:34,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:34,318 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:08:34,319 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:34,320 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418314196] [2021-11-02 23:08:34,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418314196] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:08:34,321 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:08:34,322 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-11-02 23:08:34,324 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [124188785] [2021-11-02 23:08:34,330 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2021-11-02 23:08:34,331 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:34,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2021-11-02 23:08:34,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 23:08:34,370 INFO L87 Difference]: Start difference. First operand has 16 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 15 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:34,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:34,393 INFO L93 Difference]: Finished difference Result 29 states and 47 transitions. [2021-11-02 23:08:34,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2021-11-02 23:08:34,395 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-02 23:08:34,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:34,407 INFO L225 Difference]: With dead ends: 29 [2021-11-02 23:08:34,408 INFO L226 Difference]: Without dead ends: 12 [2021-11-02 23:08:34,413 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2021-11-02 23:08:34,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2021-11-02 23:08:34,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2021-11-02 23:08:34,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 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) [2021-11-02 23:08:34,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 16 transitions. [2021-11-02 23:08:34,455 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 16 transitions. Word has length 11 [2021-11-02 23:08:34,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:34,457 INFO L470 AbstractCegarLoop]: Abstraction has 12 states and 16 transitions. [2021-11-02 23:08:34,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 5.5) internal successors, (11), 2 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:34,458 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 16 transitions. [2021-11-02 23:08:34,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2021-11-02 23:08:34,459 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:34,460 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:34,460 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-11-02 23:08:34,461 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:34,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:34,467 INFO L85 PathProgramCache]: Analyzing trace with hash 58526560, now seen corresponding path program 1 times [2021-11-02 23:08:34,467 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:34,469 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1276473228] [2021-11-02 23:08:34,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:34,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:34,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:34,690 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:08:34,690 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:34,691 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1276473228] [2021-11-02 23:08:34,691 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1276473228] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:08:34,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:08:34,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:08:34,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840168498] [2021-11-02 23:08:34,694 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:08:34,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:34,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:08:34,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:08:34,700 INFO L87 Difference]: Start difference. First operand 12 states and 16 transitions. Second operand has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:34,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:34,789 INFO L93 Difference]: Finished difference Result 27 states and 38 transitions. [2021-11-02 23:08:34,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:08:34,790 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2021-11-02 23:08:34,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:34,792 INFO L225 Difference]: With dead ends: 27 [2021-11-02 23:08:34,793 INFO L226 Difference]: Without dead ends: 18 [2021-11-02 23:08:34,794 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:08:34,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 18 states. [2021-11-02 23:08:34,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 18 to 18. [2021-11-02 23:08:34,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.4705882352941178) internal successors, (25), 17 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:34,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 25 transitions. [2021-11-02 23:08:34,812 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 25 transitions. Word has length 11 [2021-11-02 23:08:34,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:34,813 INFO L470 AbstractCegarLoop]: Abstraction has 18 states and 25 transitions. [2021-11-02 23:08:34,813 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.75) internal successors, (11), 4 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:34,814 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 25 transitions. [2021-11-02 23:08:34,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-02 23:08:34,815 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:34,816 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:34,816 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-11-02 23:08:34,818 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:34,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:34,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1815988777, now seen corresponding path program 1 times [2021-11-02 23:08:34,830 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:34,833 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993264661] [2021-11-02 23:08:34,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:34,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:34,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:34,944 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:08:34,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:34,946 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993264661] [2021-11-02 23:08:34,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993264661] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:08:34,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:08:34,950 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:08:34,951 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322258810] [2021-11-02 23:08:34,952 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:08:34,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:34,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:08:34,956 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:08:34,957 INFO L87 Difference]: Start difference. First operand 18 states and 25 transitions. Second operand has 3 states, 3 states have (on average 4.0) 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) [2021-11-02 23:08:34,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:34,990 INFO L93 Difference]: Finished difference Result 28 states and 39 transitions. [2021-11-02 23:08:34,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:08:34,991 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) 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 [2021-11-02 23:08:34,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:34,995 INFO L225 Difference]: With dead ends: 28 [2021-11-02 23:08:34,996 INFO L226 Difference]: Without dead ends: 22 [2021-11-02 23:08:34,998 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:08:34,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2021-11-02 23:08:35,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2021-11-02 23:08:35,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:35,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 31 transitions. [2021-11-02 23:08:35,015 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 31 transitions. Word has length 12 [2021-11-02 23:08:35,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:35,015 INFO L470 AbstractCegarLoop]: Abstraction has 22 states and 31 transitions. [2021-11-02 23:08:35,016 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) 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) [2021-11-02 23:08:35,016 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 31 transitions. [2021-11-02 23:08:35,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2021-11-02 23:08:35,018 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:35,019 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:35,020 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-11-02 23:08:35,021 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:35,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:35,022 INFO L85 PathProgramCache]: Analyzing trace with hash 1861241306, now seen corresponding path program 1 times [2021-11-02 23:08:35,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:35,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98085421] [2021-11-02 23:08:35,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:35,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:35,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:35,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:08:35,122 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:35,122 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98085421] [2021-11-02 23:08:35,123 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98085421] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:08:35,123 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:08:35,123 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2021-11-02 23:08:35,124 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [775901987] [2021-11-02 23:08:35,124 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-11-02 23:08:35,125 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:35,126 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-11-02 23:08:35,126 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:08:35,126 INFO L87 Difference]: Start difference. First operand 22 states and 31 transitions. Second operand has 3 states, 3 states have (on average 4.0) 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) [2021-11-02 23:08:35,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:35,145 INFO L93 Difference]: Finished difference Result 37 states and 53 transitions. [2021-11-02 23:08:35,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-11-02 23:08:35,146 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.0) 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 [2021-11-02 23:08:35,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:35,147 INFO L225 Difference]: With dead ends: 37 [2021-11-02 23:08:35,147 INFO L226 Difference]: Without dead ends: 27 [2021-11-02 23:08:35,148 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-11-02 23:08:35,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2021-11-02 23:08:35,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 27. [2021-11-02 23:08:35,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 26 states have (on average 1.4615384615384615) internal successors, (38), 26 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:35,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 38 transitions. [2021-11-02 23:08:35,155 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 38 transitions. Word has length 12 [2021-11-02 23:08:35,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:35,156 INFO L470 AbstractCegarLoop]: Abstraction has 27 states and 38 transitions. [2021-11-02 23:08:35,156 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.0) 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) [2021-11-02 23:08:35,156 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 38 transitions. [2021-11-02 23:08:35,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-11-02 23:08:35,157 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:35,158 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:35,158 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-11-02 23:08:35,158 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:35,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:35,160 INFO L85 PathProgramCache]: Analyzing trace with hash 1947191488, now seen corresponding path program 1 times [2021-11-02 23:08:35,160 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:35,160 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691663986] [2021-11-02 23:08:35,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:35,161 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:35,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:35,223 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 23:08:35,224 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:35,224 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691663986] [2021-11-02 23:08:35,225 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691663986] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:08:35,225 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-11-02 23:08:35,225 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2021-11-02 23:08:35,225 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192100988] [2021-11-02 23:08:35,226 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:08:35,226 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:35,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:08:35,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:08:35,228 INFO L87 Difference]: Start difference. First operand 27 states and 38 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:35,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:35,266 INFO L93 Difference]: Finished difference Result 34 states and 45 transitions. [2021-11-02 23:08:35,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:08:35,267 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-11-02 23:08:35,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:35,268 INFO L225 Difference]: With dead ends: 34 [2021-11-02 23:08:35,268 INFO L226 Difference]: Without dead ends: 23 [2021-11-02 23:08:35,269 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:08:35,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2021-11-02 23:08:35,273 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2021-11-02 23:08:35,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:35,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 32 transitions. [2021-11-02 23:08:35,275 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 32 transitions. Word has length 13 [2021-11-02 23:08:35,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:35,275 INFO L470 AbstractCegarLoop]: Abstraction has 23 states and 32 transitions. [2021-11-02 23:08:35,276 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:35,276 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 32 transitions. [2021-11-02 23:08:35,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-11-02 23:08:35,277 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:35,277 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:35,278 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-11-02 23:08:35,278 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:35,279 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:35,279 INFO L85 PathProgramCache]: Analyzing trace with hash 696660059, now seen corresponding path program 1 times [2021-11-02 23:08:35,279 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:35,280 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481714968] [2021-11-02 23:08:35,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:35,309 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:35,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:35,515 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 23:08:35,515 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:35,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481714968] [2021-11-02 23:08:35,516 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481714968] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:35,516 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127730741] [2021-11-02 23:08:35,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:35,517 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:35,517 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:08:35,519 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:08:35,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-11-02 23:08:35,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:35,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-02 23:08:35,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:08:35,751 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 23:08:35,754 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127730741] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:35,754 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:08:35,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2021-11-02 23:08:35,755 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796569112] [2021-11-02 23:08:35,755 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 23:08:35,756 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:35,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 23:08:35,757 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:08:35,757 INFO L87 Difference]: Start difference. First operand 23 states and 32 transitions. Second operand has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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) [2021-11-02 23:08:35,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:35,878 INFO L93 Difference]: Finished difference Result 57 states and 78 transitions. [2021-11-02 23:08:35,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 23:08:35,880 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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 14 [2021-11-02 23:08:35,881 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:35,885 INFO L225 Difference]: With dead ends: 57 [2021-11-02 23:08:35,886 INFO L226 Difference]: Without dead ends: 42 [2021-11-02 23:08:35,886 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:08:35,887 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-11-02 23:08:35,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 29. [2021-11-02 23:08:35,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 28 states have (on average 1.4285714285714286) internal successors, (40), 28 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:35,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 40 transitions. [2021-11-02 23:08:35,895 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 40 transitions. Word has length 14 [2021-11-02 23:08:35,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:35,896 INFO L470 AbstractCegarLoop]: Abstraction has 29 states and 40 transitions. [2021-11-02 23:08:35,896 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.6666666666666665) internal successors, (16), 6 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) [2021-11-02 23:08:35,896 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 40 transitions. [2021-11-02 23:08:35,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-02 23:08:35,897 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:35,897 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:35,934 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-11-02 23:08:36,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:36,114 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:36,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:36,114 INFO L85 PathProgramCache]: Analyzing trace with hash -601796193, now seen corresponding path program 1 times [2021-11-02 23:08:36,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:36,115 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662359907] [2021-11-02 23:08:36,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:36,116 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:36,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:36,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 23:08:36,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:36,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662359907] [2021-11-02 23:08:36,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1662359907] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:36,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698840381] [2021-11-02 23:08:36,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:36,289 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:36,289 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:08:36,301 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:08:36,312 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-11-02 23:08:36,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:36,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 23:08:36,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:08:36,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 23:08:36,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698840381] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:36,504 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:08:36,505 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-11-02 23:08:36,505 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918954444] [2021-11-02 23:08:36,506 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:08:36,506 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:36,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:08:36,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:08:36,507 INFO L87 Difference]: Start difference. First operand 29 states and 40 transitions. Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:36,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:36,554 INFO L93 Difference]: Finished difference Result 43 states and 59 transitions. [2021-11-02 23:08:36,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:08:36,557 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 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 [2021-11-02 23:08:36,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:36,558 INFO L225 Difference]: With dead ends: 43 [2021-11-02 23:08:36,558 INFO L226 Difference]: Without dead ends: 37 [2021-11-02 23:08:36,558 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:08:36,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2021-11-02 23:08:36,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2021-11-02 23:08:36,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.457142857142857) internal successors, (51), 35 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:36,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 51 transitions. [2021-11-02 23:08:36,570 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 51 transitions. Word has length 15 [2021-11-02 23:08:36,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:36,570 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 51 transitions. [2021-11-02 23:08:36,571 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 4 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:36,571 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 51 transitions. [2021-11-02 23:08:36,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-02 23:08:36,575 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:36,575 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:36,626 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-11-02 23:08:36,793 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2021-11-02 23:08:36,793 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:36,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:36,794 INFO L85 PathProgramCache]: Analyzing trace with hash -556543664, now seen corresponding path program 1 times [2021-11-02 23:08:36,794 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:36,794 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837752592] [2021-11-02 23:08:36,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:36,794 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:36,826 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:36,960 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 23:08:36,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:36,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837752592] [2021-11-02 23:08:36,961 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837752592] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:36,961 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65425263] [2021-11-02 23:08:36,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:36,961 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:36,962 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:08:36,963 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:08:36,989 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-11-02 23:08:37,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:37,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-02 23:08:37,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:08:37,309 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:08:37,310 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [65425263] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:37,315 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:08:37,315 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8] total 10 [2021-11-02 23:08:37,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34635704] [2021-11-02 23:08:37,317 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 23:08:37,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:37,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 23:08:37,321 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2021-11-02 23:08:37,321 INFO L87 Difference]: Start difference. First operand 36 states and 51 transitions. Second operand has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:37,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:37,438 INFO L93 Difference]: Finished difference Result 59 states and 80 transitions. [2021-11-02 23:08:37,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 23:08:37,439 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-02 23:08:37,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:37,443 INFO L225 Difference]: With dead ends: 59 [2021-11-02 23:08:37,443 INFO L226 Difference]: Without dead ends: 48 [2021-11-02 23:08:37,447 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-11-02 23:08:37,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-02 23:08:37,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 36. [2021-11-02 23:08:37,458 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) [2021-11-02 23:08:37,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 50 transitions. [2021-11-02 23:08:37,459 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 50 transitions. Word has length 15 [2021-11-02 23:08:37,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:37,459 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 50 transitions. [2021-11-02 23:08:37,460 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 2.3) internal successors, (23), 10 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:37,460 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 50 transitions. [2021-11-02 23:08:37,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-11-02 23:08:37,461 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:37,461 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:37,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-11-02 23:08:37,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:37,668 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:37,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:37,669 INFO L85 PathProgramCache]: Analyzing trace with hash -678202944, now seen corresponding path program 2 times [2021-11-02 23:08:37,670 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:37,670 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569077099] [2021-11-02 23:08:37,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:37,670 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:37,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:37,856 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 23:08:37,857 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:37,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569077099] [2021-11-02 23:08:37,857 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569077099] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:37,857 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353180522] [2021-11-02 23:08:37,858 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:08:37,858 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:37,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:08:37,860 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:08:37,878 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-11-02 23:08:37,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:08:37,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:08:37,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-02 23:08:37,977 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:08:38,189 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:08:38,189 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1353180522] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:38,190 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:08:38,190 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8] total 9 [2021-11-02 23:08:38,190 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003369073] [2021-11-02 23:08:38,191 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 23:08:38,191 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:38,192 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 23:08:38,192 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-02 23:08:38,193 INFO L87 Difference]: Start difference. First operand 36 states and 50 transitions. Second operand has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 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) [2021-11-02 23:08:38,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:38,351 INFO L93 Difference]: Finished difference Result 90 states and 125 transitions. [2021-11-02 23:08:38,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 23:08:38,352 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-11-02 23:08:38,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:38,353 INFO L225 Difference]: With dead ends: 90 [2021-11-02 23:08:38,353 INFO L226 Difference]: Without dead ends: 73 [2021-11-02 23:08:38,354 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-11-02 23:08:38,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2021-11-02 23:08:38,362 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 47. [2021-11-02 23:08:38,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 46 states have (on average 1.391304347826087) internal successors, (64), 46 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:38,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 64 transitions. [2021-11-02 23:08:38,364 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 64 transitions. Word has length 15 [2021-11-02 23:08:38,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:38,365 INFO L470 AbstractCegarLoop]: Abstraction has 47 states and 64 transitions. [2021-11-02 23:08:38,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.4444444444444446) internal successors, (22), 9 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) [2021-11-02 23:08:38,366 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 64 transitions. [2021-11-02 23:08:38,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-02 23:08:38,367 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:38,367 INFO L513 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:38,415 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-11-02 23:08:38,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:38,581 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:38,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:38,581 INFO L85 PathProgramCache]: Analyzing trace with hash -71318983, now seen corresponding path program 1 times [2021-11-02 23:08:38,581 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:38,582 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799641217] [2021-11-02 23:08:38,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:38,582 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:38,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:38,695 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 23:08:38,695 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:38,695 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799641217] [2021-11-02 23:08:38,696 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799641217] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:38,696 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609325813] [2021-11-02 23:08:38,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:38,696 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:38,697 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:08:38,698 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:08:38,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-11-02 23:08:38,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:38,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-02 23:08:38,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:08:38,947 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 23:08:38,948 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609325813] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:38,948 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:08:38,948 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 7 [2021-11-02 23:08:38,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287364216] [2021-11-02 23:08:38,949 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 23:08:38,949 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:38,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 23:08:38,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:08:38,951 INFO L87 Difference]: Start difference. First operand 47 states and 64 transitions. Second operand has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 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) [2021-11-02 23:08:39,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:39,019 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2021-11-02 23:08:39,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 23:08:39,020 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 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 16 [2021-11-02 23:08:39,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:39,021 INFO L225 Difference]: With dead ends: 54 [2021-11-02 23:08:39,021 INFO L226 Difference]: Without dead ends: 48 [2021-11-02 23:08:39,021 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 13 SyntacticMatches, 5 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2021-11-02 23:08:39,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2021-11-02 23:08:39,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2021-11-02 23:08:39,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.3829787234042554) internal successors, (65), 47 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:39,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 65 transitions. [2021-11-02 23:08:39,029 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 65 transitions. Word has length 16 [2021-11-02 23:08:39,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:39,029 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 65 transitions. [2021-11-02 23:08:39,030 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.857142857142857) internal successors, (20), 7 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) [2021-11-02 23:08:39,030 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 65 transitions. [2021-11-02 23:08:39,031 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-02 23:08:39,031 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:39,032 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:39,061 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-11-02 23:08:39,238 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-11-02 23:08:39,239 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:39,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:39,239 INFO L85 PathProgramCache]: Analyzing trace with hash -349283077, now seen corresponding path program 3 times [2021-11-02 23:08:39,239 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:39,240 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765617964] [2021-11-02 23:08:39,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:39,240 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:39,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:39,353 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 23:08:39,353 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:39,353 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765617964] [2021-11-02 23:08:39,354 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1765617964] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:39,354 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198968703] [2021-11-02 23:08:39,354 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:08:39,354 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:39,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:08:39,359 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:08:39,377 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-11-02 23:08:39,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-02 23:08:39,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:08:39,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 23:08:39,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:08:39,551 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-02 23:08:39,551 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198968703] provided 1 perfect and 0 imperfect interpolant sequences [2021-11-02 23:08:39,552 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-11-02 23:08:39,552 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7] total 9 [2021-11-02 23:08:39,556 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137683302] [2021-11-02 23:08:39,556 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:08:39,557 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:39,558 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:08:39,558 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=56, Unknown=0, NotChecked=0, Total=72 [2021-11-02 23:08:39,559 INFO L87 Difference]: Start difference. First operand 48 states and 65 transitions. Second operand has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:39,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:39,610 INFO L93 Difference]: Finished difference Result 54 states and 71 transitions. [2021-11-02 23:08:39,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 23:08:39,611 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-11-02 23:08:39,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:39,612 INFO L225 Difference]: With dead ends: 54 [2021-11-02 23:08:39,612 INFO L226 Difference]: Without dead ends: 45 [2021-11-02 23:08:39,614 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=20, Invalid=70, Unknown=0, NotChecked=0, Total=90 [2021-11-02 23:08:39,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-02 23:08:39,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-11-02 23:08:39,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.3636363636363635) internal successors, (60), 44 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:39,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 60 transitions. [2021-11-02 23:08:39,638 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 60 transitions. Word has length 16 [2021-11-02 23:08:39,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:39,638 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 60 transitions. [2021-11-02 23:08:39,638 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.5) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:39,639 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 60 transitions. [2021-11-02 23:08:39,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-11-02 23:08:39,639 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:39,639 INFO L513 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:39,666 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-11-02 23:08:39,840 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:39,840 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:39,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:39,841 INFO L85 PathProgramCache]: Analyzing trace with hash -805670053, now seen corresponding path program 1 times [2021-11-02 23:08:39,841 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:39,842 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695164706] [2021-11-02 23:08:39,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:39,842 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:39,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:39,977 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 23:08:39,977 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:39,977 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695164706] [2021-11-02 23:08:39,977 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695164706] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:39,978 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123748170] [2021-11-02 23:08:39,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:39,978 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:39,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:08:39,979 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:08:39,993 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-11-02 23:08:40,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:40,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 13 conjunts are in the unsatisfiable core [2021-11-02 23:08:40,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:08:40,201 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 23:08:40,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123748170] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:40,202 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:08:40,202 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2021-11-02 23:08:40,202 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [103904053] [2021-11-02 23:08:40,203 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 23:08:40,203 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:40,204 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 23:08:40,204 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2021-11-02 23:08:40,204 INFO L87 Difference]: Start difference. First operand 45 states and 60 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 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) [2021-11-02 23:08:40,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:40,386 INFO L93 Difference]: Finished difference Result 101 states and 135 transitions. [2021-11-02 23:08:40,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 23:08:40,390 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 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 16 [2021-11-02 23:08:40,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:40,391 INFO L225 Difference]: With dead ends: 101 [2021-11-02 23:08:40,391 INFO L226 Difference]: Without dead ends: 86 [2021-11-02 23:08:40,392 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-11-02 23:08:40,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2021-11-02 23:08:40,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 51. [2021-11-02 23:08:40,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 1.36) internal successors, (68), 50 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:40,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 68 transitions. [2021-11-02 23:08:40,399 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 68 transitions. Word has length 16 [2021-11-02 23:08:40,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:40,399 INFO L470 AbstractCegarLoop]: Abstraction has 51 states and 68 transitions. [2021-11-02 23:08:40,399 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 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) [2021-11-02 23:08:40,399 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 68 transitions. [2021-11-02 23:08:40,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-02 23:08:40,400 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:40,400 INFO L513 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:40,443 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-11-02 23:08:40,621 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:40,622 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:40,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:40,622 INFO L85 PathProgramCache]: Analyzing trace with hash -806394657, now seen corresponding path program 2 times [2021-11-02 23:08:40,622 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:40,623 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983986761] [2021-11-02 23:08:40,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:40,623 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:40,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:40,794 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:08:40,794 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:40,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983986761] [2021-11-02 23:08:40,795 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1983986761] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:40,795 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515172303] [2021-11-02 23:08:40,795 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:08:40,796 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:40,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:08:40,809 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:08:40,811 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-11-02 23:08:40,927 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:08:40,927 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:08:40,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 23:08:40,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:08:41,014 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2021-11-02 23:08:41,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515172303] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:41,015 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:08:41,015 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 4 [2021-11-02 23:08:41,016 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319052468] [2021-11-02 23:08:41,016 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2021-11-02 23:08:41,016 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:41,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-11-02 23:08:41,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:08:41,018 INFO L87 Difference]: Start difference. First operand 51 states and 68 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:41,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:41,045 INFO L93 Difference]: Finished difference Result 62 states and 83 transitions. [2021-11-02 23:08:41,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-11-02 23:08:41,046 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-02 23:08:41,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:41,047 INFO L225 Difference]: With dead ends: 62 [2021-11-02 23:08:41,047 INFO L226 Difference]: Without dead ends: 45 [2021-11-02 23:08:41,048 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2021-11-02 23:08:41,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2021-11-02 23:08:41,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2021-11-02 23:08:41,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 1.3636363636363635) internal successors, (60), 44 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:41,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 60 transitions. [2021-11-02 23:08:41,054 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 60 transitions. Word has length 17 [2021-11-02 23:08:41,054 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:41,055 INFO L470 AbstractCegarLoop]: Abstraction has 45 states and 60 transitions. [2021-11-02 23:08:41,055 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 4 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:41,055 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 60 transitions. [2021-11-02 23:08:41,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-02 23:08:41,056 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:41,056 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:41,109 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2021-11-02 23:08:41,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-11-02 23:08:41,258 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:41,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:41,258 INFO L85 PathProgramCache]: Analyzing trace with hash 2118522240, now seen corresponding path program 2 times [2021-11-02 23:08:41,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:41,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194936968] [2021-11-02 23:08:41,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:41,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:41,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:41,351 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 23:08:41,351 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:41,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194936968] [2021-11-02 23:08:41,351 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194936968] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:41,351 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1535484498] [2021-11-02 23:08:41,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:08:41,352 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:41,352 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:08:41,353 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:08:41,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-11-02 23:08:41,496 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:08:41,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:08:41,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 23:08:41,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:08:41,639 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 23:08:41,639 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1535484498] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:41,640 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:08:41,640 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2021-11-02 23:08:41,640 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89921662] [2021-11-02 23:08:41,641 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2021-11-02 23:08:41,641 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:41,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-11-02 23:08:41,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-02 23:08:41,643 INFO L87 Difference]: Start difference. First operand 45 states and 60 transitions. Second operand has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:41,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:41,781 INFO L93 Difference]: Finished difference Result 74 states and 92 transitions. [2021-11-02 23:08:41,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 23:08:41,784 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-11-02 23:08:41,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:41,785 INFO L225 Difference]: With dead ends: 74 [2021-11-02 23:08:41,785 INFO L226 Difference]: Without dead ends: 64 [2021-11-02 23:08:41,785 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2021-11-02 23:08:41,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 64 states. [2021-11-02 23:08:41,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 64 to 42. [2021-11-02 23:08:41,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 41 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:41,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 56 transitions. [2021-11-02 23:08:41,792 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 56 transitions. Word has length 17 [2021-11-02 23:08:41,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:41,793 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 56 transitions. [2021-11-02 23:08:41,793 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.111111111111111) internal successors, (19), 9 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:41,793 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 56 transitions. [2021-11-02 23:08:41,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-11-02 23:08:41,794 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:41,794 INFO L513 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:41,845 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-11-02 23:08:42,021 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-11-02 23:08:42,021 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:42,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:42,022 INFO L85 PathProgramCache]: Analyzing trace with hash 800911232, now seen corresponding path program 2 times [2021-11-02 23:08:42,022 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:42,022 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934452108] [2021-11-02 23:08:42,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:42,022 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:42,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:42,176 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 23:08:42,177 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:42,177 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934452108] [2021-11-02 23:08:42,177 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934452108] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:42,178 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061407581] [2021-11-02 23:08:42,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:08:42,178 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:42,179 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:08:42,180 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:08:42,213 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-11-02 23:08:42,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:08:42,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:08:42,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 15 conjunts are in the unsatisfiable core [2021-11-02 23:08:42,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:08:42,459 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 23:08:42,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061407581] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:42,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:08:42,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2021-11-02 23:08:42,462 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678739194] [2021-11-02 23:08:42,462 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2021-11-02 23:08:42,462 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:42,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-11-02 23:08:42,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2021-11-02 23:08:42,464 INFO L87 Difference]: Start difference. First operand 42 states and 56 transitions. Second operand has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:42,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:42,732 INFO L93 Difference]: Finished difference Result 101 states and 134 transitions. [2021-11-02 23:08:42,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-11-02 23:08:42,733 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 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 17 [2021-11-02 23:08:42,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:42,734 INFO L225 Difference]: With dead ends: 101 [2021-11-02 23:08:42,734 INFO L226 Difference]: Without dead ends: 83 [2021-11-02 23:08:42,735 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-11-02 23:08:42,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2021-11-02 23:08:42,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 48. [2021-11-02 23:08:42,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.3617021276595744) internal successors, (64), 47 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:42,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 64 transitions. [2021-11-02 23:08:42,747 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 64 transitions. Word has length 17 [2021-11-02 23:08:42,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:42,747 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 64 transitions. [2021-11-02 23:08:42,748 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 1.9) internal successors, (19), 10 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:42,748 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 64 transitions. [2021-11-02 23:08:42,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-02 23:08:42,753 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:42,754 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:42,801 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-11-02 23:08:42,954 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-11-02 23:08:42,955 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:42,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:42,955 INFO L85 PathProgramCache]: Analyzing trace with hash 750125673, now seen corresponding path program 2 times [2021-11-02 23:08:42,955 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:42,956 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692911091] [2021-11-02 23:08:42,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:42,956 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:42,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:43,098 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:08:43,098 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:43,098 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692911091] [2021-11-02 23:08:43,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692911091] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:43,099 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238472847] [2021-11-02 23:08:43,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:08:43,099 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:43,100 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:08:43,101 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:08:43,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-11-02 23:08:43,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:08:43,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:08:43,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 86 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-02 23:08:43,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:08:43,367 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 23:08:43,367 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238472847] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:43,367 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:08:43,368 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 5] total 12 [2021-11-02 23:08:43,368 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901228673] [2021-11-02 23:08:43,368 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 23:08:43,368 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:43,369 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 23:08:43,369 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2021-11-02 23:08:43,370 INFO L87 Difference]: Start difference. First operand 48 states and 64 transitions. Second operand has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:43,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:43,996 INFO L93 Difference]: Finished difference Result 97 states and 134 transitions. [2021-11-02 23:08:43,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-02 23:08:43,997 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-02 23:08:43,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:43,998 INFO L225 Difference]: With dead ends: 97 [2021-11-02 23:08:43,998 INFO L226 Difference]: Without dead ends: 85 [2021-11-02 23:08:43,999 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2021-11-02 23:08:44,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2021-11-02 23:08:44,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 66. [2021-11-02 23:08:44,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.3384615384615384) internal successors, (87), 65 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:44,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 87 transitions. [2021-11-02 23:08:44,011 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 87 transitions. Word has length 18 [2021-11-02 23:08:44,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:44,011 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 87 transitions. [2021-11-02 23:08:44,012 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.5833333333333335) internal successors, (31), 12 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:44,012 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 87 transitions. [2021-11-02 23:08:44,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-11-02 23:08:44,015 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:44,015 INFO L513 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:44,059 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-11-02 23:08:44,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-11-02 23:08:44,237 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:44,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:44,238 INFO L85 PathProgramCache]: Analyzing trace with hash -934676485, now seen corresponding path program 3 times [2021-11-02 23:08:44,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:44,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2009082845] [2021-11-02 23:08:44,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:44,239 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:44,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:44,387 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 23:08:44,387 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:44,387 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2009082845] [2021-11-02 23:08:44,387 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2009082845] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:44,388 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256681450] [2021-11-02 23:08:44,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:08:44,388 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:44,388 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:08:44,393 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:08:44,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-11-02 23:08:44,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-02 23:08:44,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:08:44,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 4 conjunts are in the unsatisfiable core [2021-11-02 23:08:44,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:08:44,616 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-02 23:08:44,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256681450] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:44,617 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:08:44,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 4] total 12 [2021-11-02 23:08:44,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732552318] [2021-11-02 23:08:44,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 23:08:44,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:44,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 23:08:44,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=105, Unknown=0, NotChecked=0, Total=132 [2021-11-02 23:08:44,620 INFO L87 Difference]: Start difference. First operand 66 states and 87 transitions. Second operand has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:45,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:45,034 INFO L93 Difference]: Finished difference Result 169 states and 226 transitions. [2021-11-02 23:08:45,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-02 23:08:45,034 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-11-02 23:08:45,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:45,036 INFO L225 Difference]: With dead ends: 169 [2021-11-02 23:08:45,036 INFO L226 Difference]: Without dead ends: 149 [2021-11-02 23:08:45,037 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2021-11-02 23:08:45,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2021-11-02 23:08:45,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 70. [2021-11-02 23:08:45,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.3043478260869565) internal successors, (90), 69 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:45,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 90 transitions. [2021-11-02 23:08:45,056 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 90 transitions. Word has length 18 [2021-11-02 23:08:45,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:45,056 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 90 transitions. [2021-11-02 23:08:45,057 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:45,057 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 90 transitions. [2021-11-02 23:08:45,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-02 23:08:45,062 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:45,062 INFO L513 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:45,110 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2021-11-02 23:08:45,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-11-02 23:08:45,281 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:45,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:45,282 INFO L85 PathProgramCache]: Analyzing trace with hash -92433222, now seen corresponding path program 3 times [2021-11-02 23:08:45,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:45,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940088177] [2021-11-02 23:08:45,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:45,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:45,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:45,397 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-02 23:08:45,398 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:45,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940088177] [2021-11-02 23:08:45,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940088177] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:45,399 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067596363] [2021-11-02 23:08:45,399 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:08:45,399 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:45,399 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:08:45,401 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:08:45,421 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-11-02 23:08:45,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-02 23:08:45,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:08:45,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-02 23:08:45,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:08:45,678 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-02 23:08:45,678 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067596363] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:45,678 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:08:45,679 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-11-02 23:08:45,679 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1786046953] [2021-11-02 23:08:45,679 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:08:45,680 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:45,680 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:08:45,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:08:45,681 INFO L87 Difference]: Start difference. First operand 70 states and 90 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) [2021-11-02 23:08:45,794 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:45,794 INFO L93 Difference]: Finished difference Result 80 states and 102 transitions. [2021-11-02 23:08:45,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 23:08:45,795 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 20 [2021-11-02 23:08:45,795 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:45,796 INFO L225 Difference]: With dead ends: 80 [2021-11-02 23:08:45,796 INFO L226 Difference]: Without dead ends: 72 [2021-11-02 23:08:45,796 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 20 SyntacticMatches, 2 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:08:45,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-11-02 23:08:45,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 72. [2021-11-02 23:08:45,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.295774647887324) internal successors, (92), 71 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:45,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 92 transitions. [2021-11-02 23:08:45,804 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 92 transitions. Word has length 20 [2021-11-02 23:08:45,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:45,804 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 92 transitions. [2021-11-02 23:08:45,805 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) [2021-11-02 23:08:45,805 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 92 transitions. [2021-11-02 23:08:45,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2021-11-02 23:08:45,805 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:45,806 INFO L513 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:45,850 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-11-02 23:08:46,022 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-11-02 23:08:46,022 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:46,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:46,023 INFO L85 PathProgramCache]: Analyzing trace with hash 222240203, now seen corresponding path program 3 times [2021-11-02 23:08:46,023 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:46,023 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064964469] [2021-11-02 23:08:46,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:46,024 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:46,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:46,186 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 23:08:46,187 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:46,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064964469] [2021-11-02 23:08:46,187 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2064964469] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:46,187 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1360928749] [2021-11-02 23:08:46,187 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:08:46,188 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:46,188 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:08:46,189 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:08:46,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-11-02 23:08:46,380 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-02 23:08:46,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:08:46,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-02 23:08:46,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:08:46,617 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-02 23:08:46,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1360928749] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:46,618 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:08:46,618 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 16 [2021-11-02 23:08:46,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194100167] [2021-11-02 23:08:46,620 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-02 23:08:46,620 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:46,620 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-02 23:08:46,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=209, Unknown=0, NotChecked=0, Total=240 [2021-11-02 23:08:46,621 INFO L87 Difference]: Start difference. First operand 72 states and 92 transitions. Second operand has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:47,461 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:47,461 INFO L93 Difference]: Finished difference Result 177 states and 233 transitions. [2021-11-02 23:08:47,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-02 23:08:47,462 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2021-11-02 23:08:47,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:47,463 INFO L225 Difference]: With dead ends: 177 [2021-11-02 23:08:47,463 INFO L226 Difference]: Without dead ends: 151 [2021-11-02 23:08:47,464 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=94, Invalid=776, Unknown=0, NotChecked=0, Total=870 [2021-11-02 23:08:47,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2021-11-02 23:08:47,476 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 97. [2021-11-02 23:08:47,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.3854166666666667) internal successors, (133), 96 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:47,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 133 transitions. [2021-11-02 23:08:47,477 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 133 transitions. Word has length 20 [2021-11-02 23:08:47,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:47,478 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 133 transitions. [2021-11-02 23:08:47,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 2.0625) internal successors, (33), 16 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:47,478 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 133 transitions. [2021-11-02 23:08:47,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-02 23:08:47,479 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:47,479 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:47,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-11-02 23:08:47,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:47,705 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:47,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:47,706 INFO L85 PathProgramCache]: Analyzing trace with hash -1223359698, now seen corresponding path program 4 times [2021-11-02 23:08:47,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:47,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [572175304] [2021-11-02 23:08:47,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:47,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:47,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:47,872 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-02 23:08:47,872 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:47,872 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [572175304] [2021-11-02 23:08:47,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [572175304] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:47,873 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [709532277] [2021-11-02 23:08:47,873 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:08:47,873 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:47,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:08:47,874 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:08:47,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-11-02 23:08:48,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:08:48,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:08:48,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 23:08:48,055 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:08:48,228 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-02 23:08:48,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [709532277] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:48,228 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:08:48,229 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 12 [2021-11-02 23:08:48,229 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731587981] [2021-11-02 23:08:48,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 23:08:48,230 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:48,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 23:08:48,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2021-11-02 23:08:48,231 INFO L87 Difference]: Start difference. First operand 97 states and 133 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 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) [2021-11-02 23:08:48,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:48,413 INFO L93 Difference]: Finished difference Result 149 states and 202 transitions. [2021-11-02 23:08:48,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-11-02 23:08:48,413 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-11-02 23:08:48,413 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:48,415 INFO L225 Difference]: With dead ends: 149 [2021-11-02 23:08:48,415 INFO L226 Difference]: Without dead ends: 125 [2021-11-02 23:08:48,415 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-11-02 23:08:48,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2021-11-02 23:08:48,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 97. [2021-11-02 23:08:48,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 97 states, 96 states have (on average 1.375) internal successors, (132), 96 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:48,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 132 transitions. [2021-11-02 23:08:48,425 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 132 transitions. Word has length 21 [2021-11-02 23:08:48,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:48,425 INFO L470 AbstractCegarLoop]: Abstraction has 97 states and 132 transitions. [2021-11-02 23:08:48,425 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 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) [2021-11-02 23:08:48,425 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 132 transitions. [2021-11-02 23:08:48,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-11-02 23:08:48,426 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:48,426 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:48,470 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-11-02 23:08:48,648 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:48,648 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:48,649 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:48,649 INFO L85 PathProgramCache]: Analyzing trace with hash 1413091807, now seen corresponding path program 3 times [2021-11-02 23:08:48,649 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:48,649 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514971448] [2021-11-02 23:08:48,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:48,649 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:48,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:48,862 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:08:48,862 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:48,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514971448] [2021-11-02 23:08:48,862 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514971448] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:48,862 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024327628] [2021-11-02 23:08:48,862 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:08:48,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:48,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:08:48,864 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:08:48,892 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-11-02 23:08:49,118 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-02 23:08:49,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:08:49,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-02 23:08:49,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:08:49,272 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2021-11-02 23:08:49,272 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024327628] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:49,272 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:08:49,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 15 [2021-11-02 23:08:49,273 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608515895] [2021-11-02 23:08:49,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-02 23:08:49,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:49,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-02 23:08:49,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=181, Unknown=0, NotChecked=0, Total=210 [2021-11-02 23:08:49,274 INFO L87 Difference]: Start difference. First operand 97 states and 132 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 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) [2021-11-02 23:08:51,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:51,101 INFO L93 Difference]: Finished difference Result 189 states and 278 transitions. [2021-11-02 23:08:51,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-02 23:08:51,101 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 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 21 [2021-11-02 23:08:51,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:51,103 INFO L225 Difference]: With dead ends: 189 [2021-11-02 23:08:51,103 INFO L226 Difference]: Without dead ends: 160 [2021-11-02 23:08:51,105 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 642 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=353, Invalid=2299, Unknown=0, NotChecked=0, Total=2652 [2021-11-02 23:08:51,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-11-02 23:08:51,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 121. [2021-11-02 23:08:51,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 121 states, 120 states have (on average 1.3583333333333334) internal successors, (163), 120 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:51,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 163 transitions. [2021-11-02 23:08:51,119 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 163 transitions. Word has length 21 [2021-11-02 23:08:51,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:51,119 INFO L470 AbstractCegarLoop]: Abstraction has 121 states and 163 transitions. [2021-11-02 23:08:51,119 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 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) [2021-11-02 23:08:51,119 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 163 transitions. [2021-11-02 23:08:51,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-02 23:08:51,120 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:51,121 INFO L513 BasicCegarLoop]: trace histogram [3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:51,168 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2021-11-02 23:08:51,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:51,337 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:51,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:51,338 INFO L85 PathProgramCache]: Analyzing trace with hash 1455648122, now seen corresponding path program 4 times [2021-11-02 23:08:51,338 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:51,338 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561887163] [2021-11-02 23:08:51,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:51,338 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:51,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:51,464 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-02 23:08:51,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:51,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561887163] [2021-11-02 23:08:51,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561887163] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:51,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805616056] [2021-11-02 23:08:51,466 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:08:51,466 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:51,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:08:51,469 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:08:51,494 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-11-02 23:08:51,694 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:08:51,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:08:51,696 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 10 conjunts are in the unsatisfiable core [2021-11-02 23:08:51,698 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:08:51,799 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 3 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-02 23:08:51,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1805616056] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:51,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:08:51,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2021-11-02 23:08:51,800 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365441224] [2021-11-02 23:08:51,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2021-11-02 23:08:51,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:51,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-11-02 23:08:51,802 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:08:51,802 INFO L87 Difference]: Start difference. First operand 121 states and 163 transitions. Second operand has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:51,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:51,843 INFO L93 Difference]: Finished difference Result 144 states and 199 transitions. [2021-11-02 23:08:51,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-11-02 23:08:51,844 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 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 22 [2021-11-02 23:08:51,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:51,846 INFO L225 Difference]: With dead ends: 144 [2021-11-02 23:08:51,846 INFO L226 Difference]: Without dead ends: 113 [2021-11-02 23:08:51,848 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2021-11-02 23:08:51,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2021-11-02 23:08:51,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 111. [2021-11-02 23:08:51,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 111 states, 110 states have (on average 1.3727272727272728) internal successors, (151), 110 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:51,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 151 transitions. [2021-11-02 23:08:51,858 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 151 transitions. Word has length 22 [2021-11-02 23:08:51,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:51,858 INFO L470 AbstractCegarLoop]: Abstraction has 111 states and 151 transitions. [2021-11-02 23:08:51,858 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.8) internal successors, (19), 5 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:51,859 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 151 transitions. [2021-11-02 23:08:51,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2021-11-02 23:08:51,859 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:51,860 INFO L513 BasicCegarLoop]: trace histogram [7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:51,903 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-11-02 23:08:52,073 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2021-11-02 23:08:52,073 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:52,073 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:52,073 INFO L85 PathProgramCache]: Analyzing trace with hash -1089458373, now seen corresponding path program 5 times [2021-11-02 23:08:52,074 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:52,074 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778185153] [2021-11-02 23:08:52,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:52,074 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:52,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:52,261 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 29 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 23:08:52,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:52,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778185153] [2021-11-02 23:08:52,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778185153] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:52,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1699181200] [2021-11-02 23:08:52,262 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:08:52,262 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:52,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:08:52,264 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:08:52,293 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-11-02 23:08:52,524 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-02 23:08:52,525 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:08:52,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 25 conjunts are in the unsatisfiable core [2021-11-02 23:08:52,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:08:52,744 INFO L134 CoverageAnalysis]: Checked inductivity of 33 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-11-02 23:08:52,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1699181200] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:52,744 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:08:52,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 13] total 14 [2021-11-02 23:08:52,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054637437] [2021-11-02 23:08:52,745 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 23:08:52,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:52,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 23:08:52,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-11-02 23:08:52,747 INFO L87 Difference]: Start difference. First operand 111 states and 151 transitions. Second operand has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:53,185 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:53,185 INFO L93 Difference]: Finished difference Result 238 states and 322 transitions. [2021-11-02 23:08:53,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 23:08:53,186 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2021-11-02 23:08:53,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:53,188 INFO L225 Difference]: With dead ends: 238 [2021-11-02 23:08:53,188 INFO L226 Difference]: Without dead ends: 220 [2021-11-02 23:08:53,189 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=229, Unknown=0, NotChecked=0, Total=272 [2021-11-02 23:08:53,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2021-11-02 23:08:53,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 142. [2021-11-02 23:08:53,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.3191489361702127) internal successors, (186), 141 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:53,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 186 transitions. [2021-11-02 23:08:53,201 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 186 transitions. Word has length 22 [2021-11-02 23:08:53,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:53,202 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 186 transitions. [2021-11-02 23:08:53,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 2.0714285714285716) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:53,202 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 186 transitions. [2021-11-02 23:08:53,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-02 23:08:53,203 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:53,203 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:53,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-11-02 23:08:53,429 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-11-02 23:08:53,429 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:53,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:53,429 INFO L85 PathProgramCache]: Analyzing trace with hash 1085075168, now seen corresponding path program 6 times [2021-11-02 23:08:53,430 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:53,430 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194205599] [2021-11-02 23:08:53,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:53,430 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:53,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:53,578 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-02 23:08:53,578 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:53,578 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194205599] [2021-11-02 23:08:53,579 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194205599] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:53,579 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [103053211] [2021-11-02 23:08:53,579 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:08:53,579 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:53,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:08:53,580 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:08:53,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-11-02 23:08:53,787 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-02 23:08:53,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:08:53,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 32 conjunts are in the unsatisfiable core [2021-11-02 23:08:53,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:08:53,971 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-02 23:08:53,972 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [103053211] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:53,972 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:08:53,972 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 13 [2021-11-02 23:08:53,972 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645137721] [2021-11-02 23:08:53,972 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 23:08:53,973 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:53,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 23:08:53,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2021-11-02 23:08:53,974 INFO L87 Difference]: Start difference. First operand 142 states and 186 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:54,170 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:54,170 INFO L93 Difference]: Finished difference Result 205 states and 257 transitions. [2021-11-02 23:08:54,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-11-02 23:08:54,171 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-02 23:08:54,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:54,172 INFO L225 Difference]: With dead ends: 205 [2021-11-02 23:08:54,172 INFO L226 Difference]: Without dead ends: 189 [2021-11-02 23:08:54,173 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-11-02 23:08:54,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2021-11-02 23:08:54,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 142. [2021-11-02 23:08:54,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.3120567375886525) internal successors, (185), 141 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:54,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 185 transitions. [2021-11-02 23:08:54,185 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 185 transitions. Word has length 23 [2021-11-02 23:08:54,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:54,186 INFO L470 AbstractCegarLoop]: Abstraction has 142 states and 185 transitions. [2021-11-02 23:08:54,186 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:54,186 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 185 transitions. [2021-11-02 23:08:54,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-02 23:08:54,187 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:54,187 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:54,235 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-11-02 23:08:54,401 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-11-02 23:08:54,401 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:54,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:54,402 INFO L85 PathProgramCache]: Analyzing trace with hash -641798784, now seen corresponding path program 7 times [2021-11-02 23:08:54,402 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:54,402 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118085756] [2021-11-02 23:08:54,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:54,402 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:54,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:54,574 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-02 23:08:54,575 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:54,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118085756] [2021-11-02 23:08:54,575 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118085756] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:54,575 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736913135] [2021-11-02 23:08:54,575 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:08:54,575 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:54,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:08:54,577 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:08:54,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-11-02 23:08:54,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:54,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-02 23:08:54,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:08:55,000 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 8 refuted. 0 times theorem prover too weak. 13 trivial. 0 not checked. [2021-11-02 23:08:55,000 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736913135] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:55,000 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:08:55,000 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 15 [2021-11-02 23:08:55,000 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972279474] [2021-11-02 23:08:55,001 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-02 23:08:55,001 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:55,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-02 23:08:55,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=180, Unknown=0, NotChecked=0, Total=210 [2021-11-02 23:08:55,002 INFO L87 Difference]: Start difference. First operand 142 states and 185 transitions. Second operand has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:56,024 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:56,024 INFO L93 Difference]: Finished difference Result 213 states and 278 transitions. [2021-11-02 23:08:56,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-02 23:08:56,026 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-02 23:08:56,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:56,028 INFO L225 Difference]: With dead ends: 213 [2021-11-02 23:08:56,028 INFO L226 Difference]: Without dead ends: 184 [2021-11-02 23:08:56,030 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=205, Invalid=1355, Unknown=0, NotChecked=0, Total=1560 [2021-11-02 23:08:56,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2021-11-02 23:08:56,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 144. [2021-11-02 23:08:56,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.2937062937062938) internal successors, (185), 143 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:56,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 185 transitions. [2021-11-02 23:08:56,042 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 185 transitions. Word has length 23 [2021-11-02 23:08:56,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:56,042 INFO L470 AbstractCegarLoop]: Abstraction has 144 states and 185 transitions. [2021-11-02 23:08:56,043 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.2666666666666666) internal successors, (34), 15 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:56,043 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 185 transitions. [2021-11-02 23:08:56,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-11-02 23:08:56,044 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:56,044 INFO L513 BasicCegarLoop]: trace histogram [8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:56,074 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2021-11-02 23:08:56,257 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2021-11-02 23:08:56,257 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:56,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:56,258 INFO L85 PathProgramCache]: Analyzing trace with hash -280216672, now seen corresponding path program 8 times [2021-11-02 23:08:56,258 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:56,258 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288528182] [2021-11-02 23:08:56,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:56,259 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:56,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:56,452 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 37 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 23:08:56,452 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:56,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288528182] [2021-11-02 23:08:56,453 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1288528182] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:56,453 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [879305981] [2021-11-02 23:08:56,453 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:08:56,453 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:56,454 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:08:56,457 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:08:56,481 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-11-02 23:08:56,730 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:08:56,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:08:56,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-02 23:08:56,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:08:56,882 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2021-11-02 23:08:56,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [879305981] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:56,883 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:08:56,883 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 11] total 13 [2021-11-02 23:08:56,883 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1933290317] [2021-11-02 23:08:56,883 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 23:08:56,884 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:56,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 23:08:56,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=132, Unknown=0, NotChecked=0, Total=156 [2021-11-02 23:08:56,885 INFO L87 Difference]: Start difference. First operand 144 states and 185 transitions. Second operand has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:57,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:08:57,403 INFO L93 Difference]: Finished difference Result 285 states and 375 transitions. [2021-11-02 23:08:57,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 23:08:57,404 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-11-02 23:08:57,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:08:57,406 INFO L225 Difference]: With dead ends: 285 [2021-11-02 23:08:57,406 INFO L226 Difference]: Without dead ends: 266 [2021-11-02 23:08:57,409 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=202, Unknown=0, NotChecked=0, Total=240 [2021-11-02 23:08:57,410 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2021-11-02 23:08:57,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 154. [2021-11-02 23:08:57,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.3006535947712419) internal successors, (199), 153 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:57,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 199 transitions. [2021-11-02 23:08:57,423 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 199 transitions. Word has length 23 [2021-11-02 23:08:57,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:08:57,424 INFO L470 AbstractCegarLoop]: Abstraction has 154 states and 199 transitions. [2021-11-02 23:08:57,424 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:08:57,424 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 199 transitions. [2021-11-02 23:08:57,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-02 23:08:57,425 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:08:57,425 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:08:57,464 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2021-11-02 23:08:57,641 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-11-02 23:08:57,641 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:08:57,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:08:57,642 INFO L85 PathProgramCache]: Analyzing trace with hash -146134359, now seen corresponding path program 4 times [2021-11-02 23:08:57,642 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:08:57,642 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488549972] [2021-11-02 23:08:57,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:08:57,642 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:08:57,658 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:08:57,840 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:08:57,841 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:08:57,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488549972] [2021-11-02 23:08:57,841 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488549972] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:57,841 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821899304] [2021-11-02 23:08:57,841 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:08:57,842 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:08:57,842 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:08:57,842 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:08:57,844 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-11-02 23:08:58,084 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:08:58,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:08:58,085 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-02 23:08:58,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:08:58,293 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 16 refuted. 0 times theorem prover too weak. 11 trivial. 0 not checked. [2021-11-02 23:08:58,294 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821899304] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:08:58,294 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:08:58,294 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 7] total 18 [2021-11-02 23:08:58,294 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128761327] [2021-11-02 23:08:58,294 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 23:08:58,295 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:08:58,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 23:08:58,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=271, Unknown=0, NotChecked=0, Total=306 [2021-11-02 23:08:58,296 INFO L87 Difference]: Start difference. First operand 154 states and 199 transitions. Second operand has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:01,985 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:09:01,985 INFO L93 Difference]: Finished difference Result 269 states and 374 transitions. [2021-11-02 23:09:01,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2021-11-02 23:09:01,986 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-02 23:09:01,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:09:01,987 INFO L225 Difference]: With dead ends: 269 [2021-11-02 23:09:01,987 INFO L226 Difference]: Without dead ends: 238 [2021-11-02 23:09:01,991 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1346 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=572, Invalid=4398, Unknown=0, NotChecked=0, Total=4970 [2021-11-02 23:09:01,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2021-11-02 23:09:02,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 190. [2021-11-02 23:09:02,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 1.291005291005291) internal successors, (244), 189 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:02,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 244 transitions. [2021-11-02 23:09:02,006 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 244 transitions. Word has length 24 [2021-11-02 23:09:02,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:09:02,007 INFO L470 AbstractCegarLoop]: Abstraction has 190 states and 244 transitions. [2021-11-02 23:09:02,007 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 2.2777777777777777) internal successors, (41), 18 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:02,008 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 244 transitions. [2021-11-02 23:09:02,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2021-11-02 23:09:02,009 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:09:02,009 INFO L513 BasicCegarLoop]: trace histogram [9, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:09:02,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-11-02 23:09:02,237 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-11-02 23:09:02,237 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:09:02,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:09:02,238 INFO L85 PathProgramCache]: Analyzing trace with hash -963527717, now seen corresponding path program 9 times [2021-11-02 23:09:02,238 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:09:02,238 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15609425] [2021-11-02 23:09:02,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:09:02,238 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:09:02,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:02,492 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 23:09:02,493 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:09:02,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15609425] [2021-11-02 23:09:02,493 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [15609425] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:02,493 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816376415] [2021-11-02 23:09:02,494 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:09:02,494 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:02,494 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:09:02,509 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:09:02,510 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-11-02 23:09:02,752 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-11-02 23:09:02,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:09:02,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-02 23:09:02,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:09:02,949 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 45 trivial. 0 not checked. [2021-11-02 23:09:02,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1816376415] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:02,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:09:02,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 20 [2021-11-02 23:09:02,950 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [378511817] [2021-11-02 23:09:02,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-02 23:09:02,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:09:02,951 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-02 23:09:02,951 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2021-11-02 23:09:02,951 INFO L87 Difference]: Start difference. First operand 190 states and 244 transitions. Second operand has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:04,143 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:09:04,143 INFO L93 Difference]: Finished difference Result 389 states and 515 transitions. [2021-11-02 23:09:04,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-02 23:09:04,144 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2021-11-02 23:09:04,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:09:04,147 INFO L225 Difference]: With dead ends: 389 [2021-11-02 23:09:04,147 INFO L226 Difference]: Without dead ends: 363 [2021-11-02 23:09:04,148 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=114, Invalid=1218, Unknown=0, NotChecked=0, Total=1332 [2021-11-02 23:09:04,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2021-11-02 23:09:04,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 179. [2021-11-02 23:09:04,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 179 states, 178 states have (on average 1.3651685393258426) internal successors, (243), 178 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:04,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 179 states to 179 states and 243 transitions. [2021-11-02 23:09:04,164 INFO L78 Accepts]: Start accepts. Automaton has 179 states and 243 transitions. Word has length 24 [2021-11-02 23:09:04,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:09:04,165 INFO L470 AbstractCegarLoop]: Abstraction has 179 states and 243 transitions. [2021-11-02 23:09:04,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.85) internal successors, (37), 20 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:04,165 INFO L276 IsEmpty]: Start isEmpty. Operand 179 states and 243 transitions. [2021-11-02 23:09:04,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-02 23:09:04,168 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:09:04,168 INFO L513 BasicCegarLoop]: trace histogram [3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:09:04,217 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-11-02 23:09:04,397 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:04,397 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:09:04,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:09:04,398 INFO L85 PathProgramCache]: Analyzing trace with hash -703235457, now seen corresponding path program 5 times [2021-11-02 23:09:04,398 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:09:04,398 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891016669] [2021-11-02 23:09:04,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:09:04,398 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:09:04,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:04,524 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-02 23:09:04,524 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:09:04,524 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891016669] [2021-11-02 23:09:04,524 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1891016669] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:04,525 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1958871493] [2021-11-02 23:09:04,525 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:09:04,525 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:04,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:09:04,526 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:09:04,545 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-11-02 23:09:04,830 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-11-02 23:09:04,830 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:09:04,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 23:09:04,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:09:04,951 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-02 23:09:04,951 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1958871493] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:04,952 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:09:04,952 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-11-02 23:09:04,952 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272640939] [2021-11-02 23:09:04,953 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 23:09:04,953 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:09:04,955 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 23:09:04,955 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:09:04,955 INFO L87 Difference]: Start difference. First operand 179 states and 243 transitions. Second operand has 6 states, 6 states have (on average 3.3333333333333335) 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) [2021-11-02 23:09:05,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:09:05,091 INFO L93 Difference]: Finished difference Result 193 states and 261 transitions. [2021-11-02 23:09:05,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-11-02 23:09:05,093 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.3333333333333335) 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 25 [2021-11-02 23:09:05,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:09:05,095 INFO L225 Difference]: With dead ends: 193 [2021-11-02 23:09:05,095 INFO L226 Difference]: Without dead ends: 181 [2021-11-02 23:09:05,096 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 26 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-11-02 23:09:05,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2021-11-02 23:09:05,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 181. [2021-11-02 23:09:05,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.3555555555555556) internal successors, (244), 180 states have internal predecessors, (244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:05,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 244 transitions. [2021-11-02 23:09:05,111 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 244 transitions. Word has length 25 [2021-11-02 23:09:05,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:09:05,112 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 244 transitions. [2021-11-02 23:09:05,112 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.3333333333333335) 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) [2021-11-02 23:09:05,112 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 244 transitions. [2021-11-02 23:09:05,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2021-11-02 23:09:05,113 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:09:05,113 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:09:05,145 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2021-11-02 23:09:05,329 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-11-02 23:09:05,329 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:09:05,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:09:05,330 INFO L85 PathProgramCache]: Analyzing trace with hash -884935634, now seen corresponding path program 10 times [2021-11-02 23:09:05,330 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:09:05,330 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856133553] [2021-11-02 23:09:05,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:09:05,331 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:09:05,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:05,503 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-02 23:09:05,503 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:09:05,503 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856133553] [2021-11-02 23:09:05,504 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856133553] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:05,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204123303] [2021-11-02 23:09:05,505 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:09:05,505 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:05,506 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:09:05,507 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:09:05,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-11-02 23:09:05,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:09:05,784 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:09:05,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 19 conjunts are in the unsatisfiable core [2021-11-02 23:09:05,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:09:05,949 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-02 23:09:05,949 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204123303] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:05,949 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:09:05,949 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2021-11-02 23:09:05,949 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [387559690] [2021-11-02 23:09:05,950 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 23:09:05,950 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:09:05,950 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 23:09:05,950 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=108, Unknown=0, NotChecked=0, Total=132 [2021-11-02 23:09:05,951 INFO L87 Difference]: Start difference. First operand 181 states and 244 transitions. Second operand has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 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) [2021-11-02 23:09:06,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:09:06,303 INFO L93 Difference]: Finished difference Result 273 states and 347 transitions. [2021-11-02 23:09:06,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-11-02 23:09:06,304 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2021-11-02 23:09:06,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:09:06,309 INFO L225 Difference]: With dead ends: 273 [2021-11-02 23:09:06,309 INFO L226 Difference]: Without dead ends: 256 [2021-11-02 23:09:06,310 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-11-02 23:09:06,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 256 states. [2021-11-02 23:09:06,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 256 to 181. [2021-11-02 23:09:06,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.35) internal successors, (243), 180 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:06,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 243 transitions. [2021-11-02 23:09:06,327 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 243 transitions. Word has length 25 [2021-11-02 23:09:06,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:09:06,327 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 243 transitions. [2021-11-02 23:09:06,328 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 1.8333333333333333) internal successors, (22), 12 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) [2021-11-02 23:09:06,328 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 243 transitions. [2021-11-02 23:09:06,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-02 23:09:06,329 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:09:06,329 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:09:06,377 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-11-02 23:09:06,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:06,545 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:09:06,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:09:06,546 INFO L85 PathProgramCache]: Analyzing trace with hash -2074329332, now seen corresponding path program 11 times [2021-11-02 23:09:06,546 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:09:06,546 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471204243] [2021-11-02 23:09:06,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:09:06,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:09:06,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:06,749 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-02 23:09:06,749 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:09:06,749 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471204243] [2021-11-02 23:09:06,749 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471204243] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:06,750 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943048547] [2021-11-02 23:09:06,750 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:09:06,750 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:06,750 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:09:06,751 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:09:06,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-11-02 23:09:07,352 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-02 23:09:07,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:09:07,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-02 23:09:07,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:09:07,580 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-02 23:09:07,580 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943048547] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:07,580 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:09:07,580 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 18 [2021-11-02 23:09:07,581 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938019476] [2021-11-02 23:09:07,581 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 23:09:07,581 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:09:07,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 23:09:07,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-11-02 23:09:07,582 INFO L87 Difference]: Start difference. First operand 181 states and 243 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:08,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:09:08,108 INFO L93 Difference]: Finished difference Result 281 states and 371 transitions. [2021-11-02 23:09:08,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-02 23:09:08,109 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-02 23:09:08,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:09:08,111 INFO L225 Difference]: With dead ends: 281 [2021-11-02 23:09:08,111 INFO L226 Difference]: Without dead ends: 240 [2021-11-02 23:09:08,112 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2021-11-02 23:09:08,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2021-11-02 23:09:08,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 181. [2021-11-02 23:09:08,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 181 states, 180 states have (on average 1.3388888888888888) internal successors, (241), 180 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:08,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 181 states to 181 states and 241 transitions. [2021-11-02 23:09:08,127 INFO L78 Accepts]: Start accepts. Automaton has 181 states and 241 transitions. Word has length 26 [2021-11-02 23:09:08,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:09:08,128 INFO L470 AbstractCegarLoop]: Abstraction has 181 states and 241 transitions. [2021-11-02 23:09:08,128 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:08,128 INFO L276 IsEmpty]: Start isEmpty. Operand 181 states and 241 transitions. [2021-11-02 23:09:08,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2021-11-02 23:09:08,129 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:09:08,129 INFO L513 BasicCegarLoop]: trace histogram [10, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:09:08,135 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-11-02 23:09:08,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-11-02 23:09:08,335 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:09:08,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:09:08,335 INFO L85 PathProgramCache]: Analyzing trace with hash -328815319, now seen corresponding path program 12 times [2021-11-02 23:09:08,336 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:09:08,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [292612153] [2021-11-02 23:09:08,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:09:08,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:09:08,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:08,588 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 58 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2021-11-02 23:09:08,589 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:09:08,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [292612153] [2021-11-02 23:09:08,589 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [292612153] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:08,589 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [793828329] [2021-11-02 23:09:08,589 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:09:08,589 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:08,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:09:08,591 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:09:08,593 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-11-02 23:09:08,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-02 23:09:08,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:09:08,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 8 conjunts are in the unsatisfiable core [2021-11-02 23:09:08,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:09:09,024 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-02 23:09:09,024 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [793828329] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:09,024 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:09:09,024 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 6] total 20 [2021-11-02 23:09:09,025 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082567671] [2021-11-02 23:09:09,025 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-02 23:09:09,025 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:09:09,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-02 23:09:09,026 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-11-02 23:09:09,027 INFO L87 Difference]: Start difference. First operand 181 states and 241 transitions. Second operand has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:10,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:09:10,200 INFO L93 Difference]: Finished difference Result 416 states and 556 transitions. [2021-11-02 23:09:10,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-11-02 23:09:10,200 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2021-11-02 23:09:10,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:09:10,203 INFO L225 Difference]: With dead ends: 416 [2021-11-02 23:09:10,203 INFO L226 Difference]: Without dead ends: 394 [2021-11-02 23:09:10,205 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=255, Invalid=1467, Unknown=0, NotChecked=0, Total=1722 [2021-11-02 23:09:10,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 394 states. [2021-11-02 23:09:10,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 394 to 226. [2021-11-02 23:09:10,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 226 states, 225 states have (on average 1.288888888888889) internal successors, (290), 225 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) [2021-11-02 23:09:10,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 226 states to 226 states and 290 transitions. [2021-11-02 23:09:10,225 INFO L78 Accepts]: Start accepts. Automaton has 226 states and 290 transitions. Word has length 26 [2021-11-02 23:09:10,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:09:10,225 INFO L470 AbstractCegarLoop]: Abstraction has 226 states and 290 transitions. [2021-11-02 23:09:10,226 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.7) internal successors, (34), 20 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:10,226 INFO L276 IsEmpty]: Start isEmpty. Operand 226 states and 290 transitions. [2021-11-02 23:09:10,227 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-02 23:09:10,227 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:09:10,227 INFO L513 BasicCegarLoop]: trace histogram [4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:09:10,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-11-02 23:09:10,453 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-11-02 23:09:10,453 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:09:10,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:09:10,454 INFO L85 PathProgramCache]: Analyzing trace with hash -318710337, now seen corresponding path program 6 times [2021-11-02 23:09:10,454 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:09:10,454 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413713211] [2021-11-02 23:09:10,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:09:10,454 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:09:10,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:10,563 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-02 23:09:10,563 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:09:10,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413713211] [2021-11-02 23:09:10,564 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413713211] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:10,564 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025448548] [2021-11-02 23:09:10,564 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:09:10,565 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:10,565 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:09:10,567 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:09:10,584 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-11-02 23:09:10,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-02 23:09:10,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:09:10,996 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-02 23:09:10,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:09:11,111 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 4 proven. 12 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2021-11-02 23:09:11,112 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025448548] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:11,112 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:09:11,112 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2021-11-02 23:09:11,112 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899151457] [2021-11-02 23:09:11,113 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2021-11-02 23:09:11,113 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:09:11,113 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2021-11-02 23:09:11,113 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:09:11,114 INFO L87 Difference]: Start difference. First operand 226 states and 290 transitions. Second operand has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:11,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:09:11,180 INFO L93 Difference]: Finished difference Result 254 states and 336 transitions. [2021-11-02 23:09:11,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2021-11-02 23:09:11,181 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-02 23:09:11,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:09:11,182 INFO L225 Difference]: With dead ends: 254 [2021-11-02 23:09:11,183 INFO L226 Difference]: Without dead ends: 214 [2021-11-02 23:09:11,184 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 30 SyntacticMatches, 2 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2021-11-02 23:09:11,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2021-11-02 23:09:11,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 211. [2021-11-02 23:09:11,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 210 states have (on average 1.3) internal successors, (273), 210 states have internal predecessors, (273), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:11,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 273 transitions. [2021-11-02 23:09:11,203 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 273 transitions. Word has length 27 [2021-11-02 23:09:11,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:09:11,203 INFO L470 AbstractCegarLoop]: Abstraction has 211 states and 273 transitions. [2021-11-02 23:09:11,203 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 3.5) internal successors, (21), 6 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:11,204 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 273 transitions. [2021-11-02 23:09:11,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-02 23:09:11,205 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:09:11,205 INFO L513 BasicCegarLoop]: trace histogram [5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:09:11,254 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-11-02 23:09:11,433 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:11,433 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:09:11,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:09:11,434 INFO L85 PathProgramCache]: Analyzing trace with hash -831872481, now seen corresponding path program 5 times [2021-11-02 23:09:11,434 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:09:11,434 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819557326] [2021-11-02 23:09:11,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:09:11,434 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:09:11,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:11,730 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:09:11,730 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:09:11,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819557326] [2021-11-02 23:09:11,730 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819557326] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:11,730 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [82711090] [2021-11-02 23:09:11,730 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:09:11,730 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:11,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:09:11,732 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:09:11,761 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-11-02 23:09:12,324 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-11-02 23:09:12,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:09:12,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 24 conjunts are in the unsatisfiable core [2021-11-02 23:09:12,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:09:12,536 INFO L134 CoverageAnalysis]: Checked inductivity of 46 backedges. 5 proven. 25 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-02 23:09:12,537 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [82711090] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:12,537 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:09:12,537 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 21 [2021-11-02 23:09:12,537 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481317173] [2021-11-02 23:09:12,538 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 23:09:12,538 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:09:12,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 23:09:12,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=379, Unknown=0, NotChecked=0, Total=420 [2021-11-02 23:09:12,539 INFO L87 Difference]: Start difference. First operand 211 states and 273 transitions. Second operand has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:19,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:09:19,210 INFO L93 Difference]: Finished difference Result 375 states and 530 transitions. [2021-11-02 23:09:19,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2021-11-02 23:09:19,210 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-02 23:09:19,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:09:19,212 INFO L225 Difference]: With dead ends: 375 [2021-11-02 23:09:19,212 INFO L226 Difference]: Without dead ends: 336 [2021-11-02 23:09:19,215 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2378 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=851, Invalid=7339, Unknown=0, NotChecked=0, Total=8190 [2021-11-02 23:09:19,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 336 states. [2021-11-02 23:09:19,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 336 to 231. [2021-11-02 23:09:19,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 1.317391304347826) internal successors, (303), 230 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:19,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 303 transitions. [2021-11-02 23:09:19,234 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 303 transitions. Word has length 27 [2021-11-02 23:09:19,234 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:09:19,234 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 303 transitions. [2021-11-02 23:09:19,235 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.1904761904761907) internal successors, (46), 21 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:19,235 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 303 transitions. [2021-11-02 23:09:19,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2021-11-02 23:09:19,236 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:09:19,236 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:09:19,251 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-11-02 23:09:19,442 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-11-02 23:09:19,442 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:09:19,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:09:19,443 INFO L85 PathProgramCache]: Analyzing trace with hash -492280992, now seen corresponding path program 13 times [2021-11-02 23:09:19,443 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:09:19,443 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128261861] [2021-11-02 23:09:19,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:09:19,444 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:09:19,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:19,625 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-02 23:09:19,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:09:19,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128261861] [2021-11-02 23:09:19,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128261861] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:19,626 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317968939] [2021-11-02 23:09:19,626 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:09:19,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:19,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:09:19,627 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:09:19,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-11-02 23:09:19,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:19,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 21 conjunts are in the unsatisfiable core [2021-11-02 23:09:19,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:09:20,157 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 0 proven. 24 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-02 23:09:20,157 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317968939] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:20,157 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:09:20,157 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2021-11-02 23:09:20,158 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328068259] [2021-11-02 23:09:20,158 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-11-02 23:09:20,158 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:09:20,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-11-02 23:09:20,159 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=130, Unknown=0, NotChecked=0, Total=156 [2021-11-02 23:09:20,159 INFO L87 Difference]: Start difference. First operand 231 states and 303 transitions. Second operand has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:20,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:09:20,498 INFO L93 Difference]: Finished difference Result 341 states and 425 transitions. [2021-11-02 23:09:20,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-11-02 23:09:20,499 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2021-11-02 23:09:20,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:09:20,502 INFO L225 Difference]: With dead ends: 341 [2021-11-02 23:09:20,502 INFO L226 Difference]: Without dead ends: 323 [2021-11-02 23:09:20,503 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-11-02 23:09:20,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 323 states. [2021-11-02 23:09:20,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 323 to 231. [2021-11-02 23:09:20,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 231 states, 230 states have (on average 1.3130434782608695) internal successors, (302), 230 states have internal predecessors, (302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:20,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 231 states to 231 states and 302 transitions. [2021-11-02 23:09:20,523 INFO L78 Accepts]: Start accepts. Automaton has 231 states and 302 transitions. Word has length 27 [2021-11-02 23:09:20,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:09:20,523 INFO L470 AbstractCegarLoop]: Abstraction has 231 states and 302 transitions. [2021-11-02 23:09:20,523 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 1.7692307692307692) internal successors, (23), 13 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:20,523 INFO L276 IsEmpty]: Start isEmpty. Operand 231 states and 302 transitions. [2021-11-02 23:09:20,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-02 23:09:20,524 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:09:20,525 INFO L513 BasicCegarLoop]: trace histogram [4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:09:20,569 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-11-02 23:09:20,749 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-11-02 23:09:20,749 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:09:20,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:09:20,750 INFO L85 PathProgramCache]: Analyzing trace with hash -329349222, now seen corresponding path program 7 times [2021-11-02 23:09:20,750 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:09:20,750 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779918779] [2021-11-02 23:09:20,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:09:20,750 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:09:20,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:20,959 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-02 23:09:20,959 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:09:20,959 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779918779] [2021-11-02 23:09:20,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [779918779] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:20,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661173604] [2021-11-02 23:09:20,960 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:09:20,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:20,960 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:09:20,962 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:09:20,973 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-11-02 23:09:21,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:21,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 20 conjunts are in the unsatisfiable core [2021-11-02 23:09:21,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:09:21,481 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 6 proven. 14 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2021-11-02 23:09:21,481 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661173604] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:21,482 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:09:21,482 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7] total 15 [2021-11-02 23:09:21,482 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216799677] [2021-11-02 23:09:21,482 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-11-02 23:09:21,482 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:09:21,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-11-02 23:09:21,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2021-11-02 23:09:21,483 INFO L87 Difference]: Start difference. First operand 231 states and 302 transitions. Second operand has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 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) [2021-11-02 23:09:21,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:09:21,681 INFO L93 Difference]: Finished difference Result 282 states and 367 transitions. [2021-11-02 23:09:21,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2021-11-02 23:09:21,682 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 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 28 [2021-11-02 23:09:21,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:09:21,684 INFO L225 Difference]: With dead ends: 282 [2021-11-02 23:09:21,684 INFO L226 Difference]: Without dead ends: 267 [2021-11-02 23:09:21,684 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-11-02 23:09:21,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2021-11-02 23:09:21,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 263. [2021-11-02 23:09:21,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 263 states, 262 states have (on average 1.2633587786259541) internal successors, (331), 262 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:21,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 263 states to 263 states and 331 transitions. [2021-11-02 23:09:21,705 INFO L78 Accepts]: Start accepts. Automaton has 263 states and 331 transitions. Word has length 28 [2021-11-02 23:09:21,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:09:21,706 INFO L470 AbstractCegarLoop]: Abstraction has 263 states and 331 transitions. [2021-11-02 23:09:21,706 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 2.4) internal successors, (36), 15 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) [2021-11-02 23:09:21,706 INFO L276 IsEmpty]: Start isEmpty. Operand 263 states and 331 transitions. [2021-11-02 23:09:21,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2021-11-02 23:09:21,707 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:09:21,708 INFO L513 BasicCegarLoop]: trace histogram [11, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:09:21,750 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-11-02 23:09:21,933 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:21,933 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:09:21,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:09:21,934 INFO L85 PathProgramCache]: Analyzing trace with hash 1092182683, now seen corresponding path program 14 times [2021-11-02 23:09:21,934 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:09:21,934 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570349669] [2021-11-02 23:09:21,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:09:21,934 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:09:21,962 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:22,231 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-02 23:09:22,231 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:09:22,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570349669] [2021-11-02 23:09:22,232 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570349669] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:22,232 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [362446983] [2021-11-02 23:09:22,232 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:09:22,232 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:22,232 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:09:22,237 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:09:22,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-11-02 23:09:22,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:09:22,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:09:22,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-02 23:09:22,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:09:22,847 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-02 23:09:22,848 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [362446983] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:22,848 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:09:22,848 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-11-02 23:09:22,848 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582418054] [2021-11-02 23:09:22,848 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 23:09:22,849 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:09:22,850 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 23:09:22,850 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=270, Unknown=0, NotChecked=0, Total=306 [2021-11-02 23:09:22,850 INFO L87 Difference]: Start difference. First operand 263 states and 331 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:23,629 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:09:23,629 INFO L93 Difference]: Finished difference Result 495 states and 644 transitions. [2021-11-02 23:09:23,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-02 23:09:23,630 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2021-11-02 23:09:23,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:09:23,632 INFO L225 Difference]: With dead ends: 495 [2021-11-02 23:09:23,633 INFO L226 Difference]: Without dead ends: 470 [2021-11-02 23:09:23,633 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=486, Unknown=0, NotChecked=0, Total=552 [2021-11-02 23:09:23,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 470 states. [2021-11-02 23:09:23,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 470 to 276. [2021-11-02 23:09:23,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 1.269090909090909) internal successors, (349), 275 states have internal predecessors, (349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:23,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 349 transitions. [2021-11-02 23:09:23,656 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 349 transitions. Word has length 28 [2021-11-02 23:09:23,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:09:23,656 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 349 transitions. [2021-11-02 23:09:23,657 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:23,657 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 349 transitions. [2021-11-02 23:09:23,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-02 23:09:23,658 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:09:23,658 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:09:23,709 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-11-02 23:09:23,885 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:23,885 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:09:23,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:09:23,885 INFO L85 PathProgramCache]: Analyzing trace with hash -1046550144, now seen corresponding path program 15 times [2021-11-02 23:09:23,886 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:09:23,886 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615511958] [2021-11-02 23:09:23,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:09:23,886 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:09:23,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:24,096 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-02 23:09:24,096 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:09:24,096 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615511958] [2021-11-02 23:09:24,097 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [615511958] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:24,097 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171527566] [2021-11-02 23:09:24,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:09:24,097 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:24,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:09:24,098 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:09:24,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-11-02 23:09:24,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-02 23:09:24,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:09:24,681 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-02 23:09:24,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:09:24,926 INFO L134 CoverageAnalysis]: Checked inductivity of 54 backedges. 0 proven. 48 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-02 23:09:24,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171527566] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:24,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:09:24,926 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 16] total 17 [2021-11-02 23:09:24,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871721965] [2021-11-02 23:09:24,927 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 23:09:24,927 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:09:24,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 23:09:24,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=234, Unknown=0, NotChecked=0, Total=272 [2021-11-02 23:09:24,928 INFO L87 Difference]: Start difference. First operand 276 states and 349 transitions. Second operand has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:25,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:09:25,452 INFO L93 Difference]: Finished difference Result 387 states and 473 transitions. [2021-11-02 23:09:25,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-02 23:09:25,452 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-02 23:09:25,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:09:25,454 INFO L225 Difference]: With dead ends: 387 [2021-11-02 23:09:25,454 INFO L226 Difference]: Without dead ends: 367 [2021-11-02 23:09:25,455 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 40 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=567, Unknown=0, NotChecked=0, Total=650 [2021-11-02 23:09:25,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 367 states. [2021-11-02 23:09:25,475 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 367 to 276. [2021-11-02 23:09:25,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 1.2654545454545454) internal successors, (348), 275 states have internal predecessors, (348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:25,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 348 transitions. [2021-11-02 23:09:25,477 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 348 transitions. Word has length 29 [2021-11-02 23:09:25,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:09:25,478 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 348 transitions. [2021-11-02 23:09:25,478 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.0) internal successors, (34), 17 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:25,478 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 348 transitions. [2021-11-02 23:09:25,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-02 23:09:25,480 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:09:25,480 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:09:25,548 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-11-02 23:09:25,693 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-11-02 23:09:25,693 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:09:25,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:09:25,693 INFO L85 PathProgramCache]: Analyzing trace with hash 337769774, now seen corresponding path program 16 times [2021-11-02 23:09:25,694 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:09:25,694 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214447904] [2021-11-02 23:09:25,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:09:25,694 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:09:25,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:25,904 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-02 23:09:25,904 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:09:25,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214447904] [2021-11-02 23:09:25,905 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214447904] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:25,905 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758682428] [2021-11-02 23:09:25,905 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:09:25,905 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:25,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:09:25,906 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:09:25,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-11-02 23:09:26,375 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:09:26,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:09:26,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 23 conjunts are in the unsatisfiable core [2021-11-02 23:09:26,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:09:26,518 INFO L134 CoverageAnalysis]: Checked inductivity of 62 backedges. 0 proven. 31 refuted. 0 times theorem prover too weak. 31 trivial. 0 not checked. [2021-11-02 23:09:26,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758682428] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:26,518 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:09:26,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2021-11-02 23:09:26,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [384535104] [2021-11-02 23:09:26,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-11-02 23:09:26,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:09:26,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-11-02 23:09:26,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=154, Unknown=0, NotChecked=0, Total=182 [2021-11-02 23:09:26,519 INFO L87 Difference]: Start difference. First operand 276 states and 348 transitions. Second operand has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 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) [2021-11-02 23:09:26,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:09:26,899 INFO L93 Difference]: Finished difference Result 415 states and 502 transitions. [2021-11-02 23:09:26,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-11-02 23:09:26,900 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-02 23:09:26,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:09:26,902 INFO L225 Difference]: With dead ends: 415 [2021-11-02 23:09:26,902 INFO L226 Difference]: Without dead ends: 396 [2021-11-02 23:09:26,903 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 29 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-11-02 23:09:26,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 396 states. [2021-11-02 23:09:26,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 396 to 276. [2021-11-02 23:09:26,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 276 states, 275 states have (on average 1.2618181818181817) internal successors, (347), 275 states have internal predecessors, (347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:26,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 276 states to 276 states and 347 transitions. [2021-11-02 23:09:26,924 INFO L78 Accepts]: Start accepts. Automaton has 276 states and 347 transitions. Word has length 29 [2021-11-02 23:09:26,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:09:26,924 INFO L470 AbstractCegarLoop]: Abstraction has 276 states and 347 transitions. [2021-11-02 23:09:26,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 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) [2021-11-02 23:09:26,925 INFO L276 IsEmpty]: Start isEmpty. Operand 276 states and 347 transitions. [2021-11-02 23:09:26,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2021-11-02 23:09:26,926 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:09:26,926 INFO L513 BasicCegarLoop]: trace histogram [12, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:09:26,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-11-02 23:09:27,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-11-02 23:09:27,141 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:09:27,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:09:27,142 INFO L85 PathProgramCache]: Analyzing trace with hash -34484416, now seen corresponding path program 17 times [2021-11-02 23:09:27,142 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:09:27,142 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717484601] [2021-11-02 23:09:27,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:09:27,142 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:09:27,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:27,447 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-02 23:09:27,447 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:09:27,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717484601] [2021-11-02 23:09:27,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717484601] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:27,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065807043] [2021-11-02 23:09:27,447 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:09:27,448 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:27,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:09:27,448 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:09:27,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-11-02 23:09:28,384 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-02 23:09:28,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:09:28,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 141 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-02 23:09:28,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:09:28,744 INFO L134 CoverageAnalysis]: Checked inductivity of 87 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:09:28,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065807043] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:28,745 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:09:28,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 22] total 24 [2021-11-02 23:09:28,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257292299] [2021-11-02 23:09:28,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-02 23:09:28,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:09:28,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-02 23:09:28,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=488, Unknown=0, NotChecked=0, Total=552 [2021-11-02 23:09:28,747 INFO L87 Difference]: Start difference. First operand 276 states and 347 transitions. Second operand has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:29,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:09:29,571 INFO L93 Difference]: Finished difference Result 526 states and 685 transitions. [2021-11-02 23:09:29,572 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-02 23:09:29,572 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2021-11-02 23:09:29,572 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:09:29,574 INFO L225 Difference]: With dead ends: 526 [2021-11-02 23:09:29,574 INFO L226 Difference]: Without dead ends: 501 [2021-11-02 23:09:29,575 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=75, Invalid=575, Unknown=0, NotChecked=0, Total=650 [2021-11-02 23:09:29,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 501 states. [2021-11-02 23:09:29,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 501 to 289. [2021-11-02 23:09:29,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 289 states, 288 states have (on average 1.2673611111111112) internal successors, (365), 288 states have internal predecessors, (365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:29,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 289 states to 289 states and 365 transitions. [2021-11-02 23:09:29,598 INFO L78 Accepts]: Start accepts. Automaton has 289 states and 365 transitions. Word has length 29 [2021-11-02 23:09:29,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:09:29,599 INFO L470 AbstractCegarLoop]: Abstraction has 289 states and 365 transitions. [2021-11-02 23:09:29,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.5833333333333333) internal successors, (38), 24 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:29,599 INFO L276 IsEmpty]: Start isEmpty. Operand 289 states and 365 transitions. [2021-11-02 23:09:29,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-02 23:09:29,601 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:09:29,601 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 5, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:09:29,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2021-11-02 23:09:29,807 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-11-02 23:09:29,808 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:09:29,808 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:09:29,808 INFO L85 PathProgramCache]: Analyzing trace with hash 405263290, now seen corresponding path program 18 times [2021-11-02 23:09:29,808 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:09:29,808 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479458047] [2021-11-02 23:09:29,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:09:29,809 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:09:29,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:30,040 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 24 trivial. 0 not checked. [2021-11-02 23:09:30,040 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:09:30,040 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479458047] [2021-11-02 23:09:30,041 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479458047] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:30,041 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987618782] [2021-11-02 23:09:30,041 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:09:30,041 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:30,041 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:09:30,065 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:09:30,093 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-11-02 23:09:30,709 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-02 23:09:30,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:09:30,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-02 23:09:30,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:09:30,974 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 12 proven. 21 refuted. 0 times theorem prover too weak. 27 trivial. 0 not checked. [2021-11-02 23:09:30,975 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987618782] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:30,975 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:09:30,975 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 8] total 21 [2021-11-02 23:09:30,975 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [22806374] [2021-11-02 23:09:30,975 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 23:09:30,976 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:09:30,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 23:09:30,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2021-11-02 23:09:30,977 INFO L87 Difference]: Start difference. First operand 289 states and 365 transitions. Second operand has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:34,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:09:34,313 INFO L93 Difference]: Finished difference Result 412 states and 519 transitions. [2021-11-02 23:09:34,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2021-11-02 23:09:34,321 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-02 23:09:34,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:09:34,323 INFO L225 Difference]: With dead ends: 412 [2021-11-02 23:09:34,324 INFO L226 Difference]: Without dead ends: 362 [2021-11-02 23:09:34,326 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1284 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=516, Invalid=4596, Unknown=0, NotChecked=0, Total=5112 [2021-11-02 23:09:34,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 362 states. [2021-11-02 23:09:34,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 362 to 290. [2021-11-02 23:09:34,347 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 290 states, 289 states have (on average 1.2560553633217992) internal successors, (363), 289 states have internal predecessors, (363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:34,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 290 states to 290 states and 363 transitions. [2021-11-02 23:09:34,348 INFO L78 Accepts]: Start accepts. Automaton has 290 states and 363 transitions. Word has length 30 [2021-11-02 23:09:34,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:09:34,349 INFO L470 AbstractCegarLoop]: Abstraction has 290 states and 363 transitions. [2021-11-02 23:09:34,349 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.0) internal successors, (42), 21 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:34,349 INFO L276 IsEmpty]: Start isEmpty. Operand 290 states and 363 transitions. [2021-11-02 23:09:34,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-02 23:09:34,351 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:09:34,351 INFO L513 BasicCegarLoop]: trace histogram [6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:09:34,395 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Forceful destruction successful, exit code 0 [2021-11-02 23:09:34,570 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2021-11-02 23:09:34,571 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:09:34,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:09:34,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1895449321, now seen corresponding path program 6 times [2021-11-02 23:09:34,571 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:09:34,571 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232862932] [2021-11-02 23:09:34,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:09:34,572 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:09:34,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:34,893 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:09:34,894 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:09:34,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232862932] [2021-11-02 23:09:34,894 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232862932] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:34,894 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365258325] [2021-11-02 23:09:34,894 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:09:34,894 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:34,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:09:34,895 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:09:34,896 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-11-02 23:09:35,388 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-11-02 23:09:35,388 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:09:35,389 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-02 23:09:35,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:09:35,635 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 6 proven. 36 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2021-11-02 23:09:35,636 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365258325] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:35,636 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:09:35,636 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9] total 24 [2021-11-02 23:09:35,636 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353597369] [2021-11-02 23:09:35,636 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-02 23:09:35,636 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:09:35,637 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-02 23:09:35,637 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=505, Unknown=0, NotChecked=0, Total=552 [2021-11-02 23:09:35,637 INFO L87 Difference]: Start difference. First operand 290 states and 363 transitions. Second operand has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:55,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:09:55,255 INFO L93 Difference]: Finished difference Result 479 states and 651 transitions. [2021-11-02 23:09:55,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2021-11-02 23:09:55,255 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 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 30 [2021-11-02 23:09:55,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:09:55,257 INFO L225 Difference]: With dead ends: 479 [2021-11-02 23:09:55,257 INFO L226 Difference]: Without dead ends: 438 [2021-11-02 23:09:55,263 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 157 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5402 ImplicationChecksByTransitivity, 16.9s TimeCoverageRelationStatistics Valid=1445, Invalid=15067, Unknown=0, NotChecked=0, Total=16512 [2021-11-02 23:09:55,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 438 states. [2021-11-02 23:09:55,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 438 to 341. [2021-11-02 23:09:55,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 341 states, 340 states have (on average 1.2558823529411764) internal successors, (427), 340 states have internal predecessors, (427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:55,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 341 states to 341 states and 427 transitions. [2021-11-02 23:09:55,286 INFO L78 Accepts]: Start accepts. Automaton has 341 states and 427 transitions. Word has length 30 [2021-11-02 23:09:55,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:09:55,286 INFO L470 AbstractCegarLoop]: Abstraction has 341 states and 427 transitions. [2021-11-02 23:09:55,287 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.125) internal successors, (51), 24 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:55,287 INFO L276 IsEmpty]: Start isEmpty. Operand 341 states and 427 transitions. [2021-11-02 23:09:55,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2021-11-02 23:09:55,288 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:09:55,288 INFO L513 BasicCegarLoop]: trace histogram [13, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:09:55,318 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-11-02 23:09:55,497 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:55,497 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:09:55,497 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:09:55,498 INFO L85 PathProgramCache]: Analyzing trace with hash -601426117, now seen corresponding path program 19 times [2021-11-02 23:09:55,498 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:09:55,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792046922] [2021-11-02 23:09:55,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:09:55,498 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:09:55,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:55,829 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-02 23:09:55,829 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:09:55,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792046922] [2021-11-02 23:09:55,829 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792046922] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:55,829 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1340938853] [2021-11-02 23:09:55,830 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:09:55,830 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:55,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:09:55,831 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:09:55,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-11-02 23:09:56,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:56,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 35 conjunts are in the unsatisfiable core [2021-11-02 23:09:56,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:09:56,628 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-02 23:09:56,628 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1340938853] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:56,628 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:09:56,628 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-11-02 23:09:56,629 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876921519] [2021-11-02 23:09:56,629 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-02 23:09:56,630 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:09:56,630 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-02 23:09:56,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=340, Unknown=0, NotChecked=0, Total=380 [2021-11-02 23:09:56,631 INFO L87 Difference]: Start difference. First operand 341 states and 427 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:57,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:09:57,715 INFO L93 Difference]: Finished difference Result 650 states and 852 transitions. [2021-11-02 23:09:57,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-11-02 23:09:57,716 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 30 [2021-11-02 23:09:57,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:09:57,719 INFO L225 Difference]: With dead ends: 650 [2021-11-02 23:09:57,719 INFO L226 Difference]: Without dead ends: 623 [2021-11-02 23:09:57,720 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 30 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=70, Invalid=580, Unknown=0, NotChecked=0, Total=650 [2021-11-02 23:09:57,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 623 states. [2021-11-02 23:09:57,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 623 to 356. [2021-11-02 23:09:57,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 1.2619718309859156) internal successors, (448), 355 states have internal predecessors, (448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:57,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 448 transitions. [2021-11-02 23:09:57,746 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 448 transitions. Word has length 30 [2021-11-02 23:09:57,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:09:57,746 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 448 transitions. [2021-11-02 23:09:57,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:57,746 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 448 transitions. [2021-11-02 23:09:57,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-02 23:09:57,748 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:09:57,748 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:09:57,791 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2021-11-02 23:09:57,962 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:57,963 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:09:57,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:09:57,963 INFO L85 PathProgramCache]: Analyzing trace with hash -1097644464, now seen corresponding path program 20 times [2021-11-02 23:09:57,963 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:09:57,963 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300679088] [2021-11-02 23:09:57,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:09:57,964 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:09:57,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:58,178 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 34 trivial. 0 not checked. [2021-11-02 23:09:58,179 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:09:58,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300679088] [2021-11-02 23:09:58,179 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300679088] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:58,179 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2114488181] [2021-11-02 23:09:58,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:09:58,179 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:58,180 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:09:58,181 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:09:58,205 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-11-02 23:09:58,674 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:09:58,674 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:09:58,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-02 23:09:58,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:09:59,017 INFO L134 CoverageAnalysis]: Checked inductivity of 68 backedges. 0 proven. 62 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-02 23:09:59,017 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2114488181] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:59,018 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:09:59,018 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 18] total 19 [2021-11-02 23:09:59,018 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2118356403] [2021-11-02 23:09:59,018 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-02 23:09:59,018 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:09:59,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-02 23:09:59,019 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=299, Unknown=0, NotChecked=0, Total=342 [2021-11-02 23:09:59,019 INFO L87 Difference]: Start difference. First operand 356 states and 448 transitions. Second operand has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 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) [2021-11-02 23:09:59,522 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:09:59,522 INFO L93 Difference]: Finished difference Result 505 states and 614 transitions. [2021-11-02 23:09:59,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-02 23:09:59,523 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 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 31 [2021-11-02 23:09:59,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:09:59,525 INFO L225 Difference]: With dead ends: 505 [2021-11-02 23:09:59,525 INFO L226 Difference]: Without dead ends: 484 [2021-11-02 23:09:59,526 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 27 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2021-11-02 23:09:59,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 484 states. [2021-11-02 23:09:59,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 484 to 356. [2021-11-02 23:09:59,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 356 states, 355 states have (on average 1.2591549295774649) internal successors, (447), 355 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:09:59,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 356 states to 356 states and 447 transitions. [2021-11-02 23:09:59,546 INFO L78 Accepts]: Start accepts. Automaton has 356 states and 447 transitions. Word has length 31 [2021-11-02 23:09:59,546 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:09:59,546 INFO L470 AbstractCegarLoop]: Abstraction has 356 states and 447 transitions. [2021-11-02 23:09:59,546 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.894736842105263) internal successors, (36), 19 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) [2021-11-02 23:09:59,547 INFO L276 IsEmpty]: Start isEmpty. Operand 356 states and 447 transitions. [2021-11-02 23:09:59,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-02 23:09:59,548 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:09:59,548 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:09:59,582 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2021-11-02 23:09:59,765 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-11-02 23:09:59,765 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:09:59,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:09:59,766 INFO L85 PathProgramCache]: Analyzing trace with hash 1030883296, now seen corresponding path program 21 times [2021-11-02 23:09:59,766 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:09:59,766 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [606284123] [2021-11-02 23:09:59,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:09:59,766 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:09:59,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:09:59,960 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 39 trivial. 0 not checked. [2021-11-02 23:09:59,960 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:09:59,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [606284123] [2021-11-02 23:09:59,960 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [606284123] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:09:59,960 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1016561397] [2021-11-02 23:09:59,960 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:09:59,960 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:09:59,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:09:59,961 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:09:59,964 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-11-02 23:10:00,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-02 23:10:00,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:10:00,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 12 conjunts are in the unsatisfiable core [2021-11-02 23:10:00,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:00,711 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 18 proven. 6 refuted. 0 times theorem prover too weak. 54 trivial. 0 not checked. [2021-11-02 23:10:00,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1016561397] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:00,711 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:00,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 8] total 20 [2021-11-02 23:10:00,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284796662] [2021-11-02 23:10:00,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-02 23:10:00,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:00,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-02 23:10:00,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2021-11-02 23:10:00,713 INFO L87 Difference]: Start difference. First operand 356 states and 447 transitions. Second operand has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:01,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:01,688 INFO L93 Difference]: Finished difference Result 556 states and 671 transitions. [2021-11-02 23:10:01,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-11-02 23:10:01,689 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-02 23:10:01,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:01,691 INFO L225 Difference]: With dead ends: 556 [2021-11-02 23:10:01,692 INFO L226 Difference]: Without dead ends: 529 [2021-11-02 23:10:01,692 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=119, Invalid=1213, Unknown=0, NotChecked=0, Total=1332 [2021-11-02 23:10:01,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 529 states. [2021-11-02 23:10:01,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 529 to 343. [2021-11-02 23:10:01,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 343 states, 342 states have (on average 1.260233918128655) internal successors, (431), 342 states have internal predecessors, (431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:01,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 343 states to 343 states and 431 transitions. [2021-11-02 23:10:01,712 INFO L78 Accepts]: Start accepts. Automaton has 343 states and 431 transitions. Word has length 31 [2021-11-02 23:10:01,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:01,713 INFO L470 AbstractCegarLoop]: Abstraction has 343 states and 431 transitions. [2021-11-02 23:10:01,713 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.65) internal successors, (33), 20 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:01,713 INFO L276 IsEmpty]: Start isEmpty. Operand 343 states and 431 transitions. [2021-11-02 23:10:01,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2021-11-02 23:10:01,715 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:01,715 INFO L513 BasicCegarLoop]: trace histogram [14, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:01,771 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-11-02 23:10:01,941 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:01,941 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:01,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:01,942 INFO L85 PathProgramCache]: Analyzing trace with hash -996749664, now seen corresponding path program 22 times [2021-11-02 23:10:01,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:01,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708923747] [2021-11-02 23:10:01,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:01,942 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:01,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:02,394 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-02 23:10:02,395 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:02,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708923747] [2021-11-02 23:10:02,395 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708923747] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:02,395 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [758176168] [2021-11-02 23:10:02,395 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:10:02,395 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:02,396 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:02,397 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:02,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-11-02 23:10:02,912 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:10:02,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:10:02,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-02 23:10:02,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:03,108 INFO L134 CoverageAnalysis]: Checked inductivity of 114 backedges. 0 proven. 108 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-02 23:10:03,109 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [758176168] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:03,109 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:03,109 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-11-02 23:10:03,109 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426774813] [2021-11-02 23:10:03,110 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 23:10:03,110 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:03,110 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 23:10:03,110 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=378, Unknown=0, NotChecked=0, Total=420 [2021-11-02 23:10:03,111 INFO L87 Difference]: Start difference. First operand 343 states and 431 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:04,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:04,147 INFO L93 Difference]: Finished difference Result 673 states and 885 transitions. [2021-11-02 23:10:04,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-11-02 23:10:04,147 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2021-11-02 23:10:04,147 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:04,150 INFO L225 Difference]: With dead ends: 673 [2021-11-02 23:10:04,150 INFO L226 Difference]: Without dead ends: 646 [2021-11-02 23:10:04,151 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 31 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=72, Invalid=630, Unknown=0, NotChecked=0, Total=702 [2021-11-02 23:10:04,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 646 states. [2021-11-02 23:10:04,176 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 646 to 358. [2021-11-02 23:10:04,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 358 states, 357 states have (on average 1.2661064425770308) internal successors, (452), 357 states have internal predecessors, (452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:04,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 358 states to 358 states and 452 transitions. [2021-11-02 23:10:04,179 INFO L78 Accepts]: Start accepts. Automaton has 358 states and 452 transitions. Word has length 31 [2021-11-02 23:10:04,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:04,179 INFO L470 AbstractCegarLoop]: Abstraction has 358 states and 452 transitions. [2021-11-02 23:10:04,179 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:04,180 INFO L276 IsEmpty]: Start isEmpty. Operand 358 states and 452 transitions. [2021-11-02 23:10:04,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-02 23:10:04,181 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:04,181 INFO L513 BasicCegarLoop]: trace histogram [5, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:04,218 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Forceful destruction successful, exit code 0 [2021-11-02 23:10:04,394 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:04,395 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:04,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:04,395 INFO L85 PathProgramCache]: Analyzing trace with hash 268339482, now seen corresponding path program 8 times [2021-11-02 23:10:04,395 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:04,395 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [469781660] [2021-11-02 23:10:04,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:04,395 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:04,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:04,547 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-02 23:10:04,547 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:04,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [469781660] [2021-11-02 23:10:04,548 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [469781660] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:04,548 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86684529] [2021-11-02 23:10:04,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:10:04,549 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:04,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:04,550 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:04,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-11-02 23:10:05,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:10:05,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:10:05,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 18 conjunts are in the unsatisfiable core [2021-11-02 23:10:05,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:05,227 INFO L134 CoverageAnalysis]: Checked inductivity of 55 backedges. 5 proven. 20 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-02 23:10:05,228 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86684529] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:05,228 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:05,228 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2021-11-02 23:10:05,228 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506447932] [2021-11-02 23:10:05,229 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-11-02 23:10:05,229 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:05,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-11-02 23:10:05,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:10:05,230 INFO L87 Difference]: Start difference. First operand 358 states and 452 transitions. Second operand has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:05,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:05,330 INFO L93 Difference]: Finished difference Result 389 states and 500 transitions. [2021-11-02 23:10:05,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-11-02 23:10:05,331 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-02 23:10:05,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:05,333 INFO L225 Difference]: With dead ends: 389 [2021-11-02 23:10:05,334 INFO L226 Difference]: Without dead ends: 346 [2021-11-02 23:10:05,334 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2021-11-02 23:10:05,335 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 346 states. [2021-11-02 23:10:05,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 346 to 342. [2021-11-02 23:10:05,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 342 states, 341 states have (on average 1.2727272727272727) internal successors, (434), 341 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:05,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 342 states to 342 states and 434 transitions. [2021-11-02 23:10:05,361 INFO L78 Accepts]: Start accepts. Automaton has 342 states and 434 transitions. Word has length 32 [2021-11-02 23:10:05,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:05,362 INFO L470 AbstractCegarLoop]: Abstraction has 342 states and 434 transitions. [2021-11-02 23:10:05,362 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 3.2857142857142856) internal successors, (23), 7 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:05,362 INFO L276 IsEmpty]: Start isEmpty. Operand 342 states and 434 transitions. [2021-11-02 23:10:05,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-02 23:10:05,363 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:05,364 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:05,413 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-11-02 23:10:05,589 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-11-02 23:10:05,589 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:05,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:05,590 INFO L85 PathProgramCache]: Analyzing trace with hash 1247012492, now seen corresponding path program 23 times [2021-11-02 23:10:05,590 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:05,590 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644596958] [2021-11-02 23:10:05,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:05,590 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:05,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:05,856 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-02 23:10:05,856 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:05,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644596958] [2021-11-02 23:10:05,856 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644596958] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:05,856 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1896927069] [2021-11-02 23:10:05,857 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:10:05,857 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:05,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:05,858 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:05,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-11-02 23:10:06,955 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-02 23:10:06,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:10:06,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 28 conjunts are in the unsatisfiable core [2021-11-02 23:10:06,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:07,241 INFO L134 CoverageAnalysis]: Checked inductivity of 78 backedges. 0 proven. 22 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-02 23:10:07,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1896927069] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:07,242 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:07,242 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 9] total 24 [2021-11-02 23:10:07,242 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [627954149] [2021-11-02 23:10:07,242 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-02 23:10:07,242 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:07,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-02 23:10:07,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=501, Unknown=0, NotChecked=0, Total=552 [2021-11-02 23:10:07,244 INFO L87 Difference]: Start difference. First operand 342 states and 434 transitions. Second operand has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:09,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:09,127 INFO L93 Difference]: Finished difference Result 467 states and 601 transitions. [2021-11-02 23:10:09,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2021-11-02 23:10:09,128 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-02 23:10:09,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:09,130 INFO L225 Difference]: With dead ends: 467 [2021-11-02 23:10:09,130 INFO L226 Difference]: Without dead ends: 359 [2021-11-02 23:10:09,132 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 96 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1085 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=276, Invalid=4694, Unknown=0, NotChecked=0, Total=4970 [2021-11-02 23:10:09,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 359 states. [2021-11-02 23:10:09,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 359 to 299. [2021-11-02 23:10:09,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 299 states, 298 states have (on average 1.2651006711409396) internal successors, (377), 298 states have internal predecessors, (377), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:09,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 299 states to 299 states and 377 transitions. [2021-11-02 23:10:09,156 INFO L78 Accepts]: Start accepts. Automaton has 299 states and 377 transitions. Word has length 32 [2021-11-02 23:10:09,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:09,157 INFO L470 AbstractCegarLoop]: Abstraction has 299 states and 377 transitions. [2021-11-02 23:10:09,157 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.7083333333333333) internal successors, (41), 24 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:09,157 INFO L276 IsEmpty]: Start isEmpty. Operand 299 states and 377 transitions. [2021-11-02 23:10:09,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2021-11-02 23:10:09,158 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:09,158 INFO L513 BasicCegarLoop]: trace histogram [15, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:09,165 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2021-11-02 23:10:09,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-11-02 23:10:09,365 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:09,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:09,365 INFO L85 PathProgramCache]: Analyzing trace with hash -366877733, now seen corresponding path program 24 times [2021-11-02 23:10:09,366 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:09,366 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368991261] [2021-11-02 23:10:09,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:09,366 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:09,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:09,724 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 123 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-02 23:10:09,724 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:09,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368991261] [2021-11-02 23:10:09,725 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1368991261] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:09,725 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556980486] [2021-11-02 23:10:09,725 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:10:09,725 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:09,725 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:09,726 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:09,728 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-11-02 23:10:10,255 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-02 23:10:10,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:10:10,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-02 23:10:10,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:10,546 INFO L134 CoverageAnalysis]: Checked inductivity of 129 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 120 trivial. 0 not checked. [2021-11-02 23:10:10,546 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556980486] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:10,546 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:10,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 9] total 28 [2021-11-02 23:10:10,547 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92089323] [2021-11-02 23:10:10,547 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-02 23:10:10,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:10,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-02 23:10:10,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=700, Unknown=0, NotChecked=0, Total=756 [2021-11-02 23:10:10,549 INFO L87 Difference]: Start difference. First operand 299 states and 377 transitions. Second operand has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:12,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:12,704 INFO L93 Difference]: Finished difference Result 542 states and 725 transitions. [2021-11-02 23:10:12,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2021-11-02 23:10:12,705 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2021-11-02 23:10:12,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:12,707 INFO L225 Difference]: With dead ends: 542 [2021-11-02 23:10:12,707 INFO L226 Difference]: Without dead ends: 506 [2021-11-02 23:10:12,708 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 27 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=192, Invalid=3230, Unknown=0, NotChecked=0, Total=3422 [2021-11-02 23:10:12,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 506 states. [2021-11-02 23:10:12,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 506 to 273. [2021-11-02 23:10:12,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 273 states, 272 states have (on average 1.3529411764705883) internal successors, (368), 272 states have internal predecessors, (368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:12,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 273 states to 273 states and 368 transitions. [2021-11-02 23:10:12,734 INFO L78 Accepts]: Start accepts. Automaton has 273 states and 368 transitions. Word has length 32 [2021-11-02 23:10:12,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:12,734 INFO L470 AbstractCegarLoop]: Abstraction has 273 states and 368 transitions. [2021-11-02 23:10:12,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.6428571428571428) internal successors, (46), 28 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:12,735 INFO L276 IsEmpty]: Start isEmpty. Operand 273 states and 368 transitions. [2021-11-02 23:10:12,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-02 23:10:12,736 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:12,736 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:12,785 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2021-11-02 23:10:12,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-11-02 23:10:12,949 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:12,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:12,950 INFO L85 PathProgramCache]: Analyzing trace with hash 1397949023, now seen corresponding path program 7 times [2021-11-02 23:10:12,950 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:12,950 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1343664516] [2021-11-02 23:10:12,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:12,950 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:12,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:13,357 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 0 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:13,357 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:13,357 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1343664516] [2021-11-02 23:10:13,358 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1343664516] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:13,358 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [308896015] [2021-11-02 23:10:13,358 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:10:13,358 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:13,358 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:13,365 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:13,369 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-11-02 23:10:13,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:13,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-02 23:10:13,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:14,315 INFO L134 CoverageAnalysis]: Checked inductivity of 85 backedges. 7 proven. 49 refuted. 0 times theorem prover too weak. 29 trivial. 0 not checked. [2021-11-02 23:10:14,315 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [308896015] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:14,315 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:14,316 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 10] total 27 [2021-11-02 23:10:14,316 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043187492] [2021-11-02 23:10:14,316 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-02 23:10:14,316 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:14,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-02 23:10:14,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=649, Unknown=0, NotChecked=0, Total=702 [2021-11-02 23:10:14,317 INFO L87 Difference]: Start difference. First operand 273 states and 368 transitions. Second operand has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:43,339 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:43,339 INFO L93 Difference]: Finished difference Result 494 states and 755 transitions. [2021-11-02 23:10:43,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2021-11-02 23:10:43,340 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-02 23:10:43,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:43,342 INFO L225 Difference]: With dead ends: 494 [2021-11-02 23:10:43,342 INFO L226 Difference]: Without dead ends: 439 [2021-11-02 23:10:43,343 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 140 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3235 ImplicationChecksByTransitivity, 27.0s TimeCoverageRelationStatistics Valid=1256, Invalid=10516, Unknown=0, NotChecked=0, Total=11772 [2021-11-02 23:10:43,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 439 states. [2021-11-02 23:10:43,366 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 439 to 328. [2021-11-02 23:10:43,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 1.342507645259939) internal successors, (439), 327 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:43,368 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 439 transitions. [2021-11-02 23:10:43,368 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 439 transitions. Word has length 33 [2021-11-02 23:10:43,368 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:43,368 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 439 transitions. [2021-11-02 23:10:43,369 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 2.074074074074074) internal successors, (56), 27 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:43,369 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 439 transitions. [2021-11-02 23:10:43,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2021-11-02 23:10:43,370 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:43,370 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:43,396 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-11-02 23:10:43,573 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:43,573 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:43,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:43,573 INFO L85 PathProgramCache]: Analyzing trace with hash 59915840, now seen corresponding path program 25 times [2021-11-02 23:10:43,574 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:43,574 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1940151331] [2021-11-02 23:10:43,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:43,574 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:43,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:43,804 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-02 23:10:43,804 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:43,804 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1940151331] [2021-11-02 23:10:43,805 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1940151331] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:43,805 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736318972] [2021-11-02 23:10:43,805 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:10:43,805 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:43,805 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:43,806 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:43,807 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-11-02 23:10:44,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:44,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 27 conjunts are in the unsatisfiable core [2021-11-02 23:10:44,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:44,477 INFO L134 CoverageAnalysis]: Checked inductivity of 84 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 42 trivial. 0 not checked. [2021-11-02 23:10:44,478 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736318972] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:44,478 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:44,478 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2021-11-02 23:10:44,478 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919149804] [2021-11-02 23:10:44,478 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-11-02 23:10:44,478 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:44,479 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-11-02 23:10:44,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=207, Unknown=0, NotChecked=0, Total=240 [2021-11-02 23:10:44,479 INFO L87 Difference]: Start difference. First operand 328 states and 439 transitions. Second operand has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:45,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:45,009 INFO L93 Difference]: Finished difference Result 500 states and 624 transitions. [2021-11-02 23:10:45,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-11-02 23:10:45,010 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2021-11-02 23:10:45,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:45,015 INFO L225 Difference]: With dead ends: 500 [2021-11-02 23:10:45,015 INFO L226 Difference]: Without dead ends: 478 [2021-11-02 23:10:45,016 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 33 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=438, Unknown=0, NotChecked=0, Total=506 [2021-11-02 23:10:45,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 478 states. [2021-11-02 23:10:45,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 478 to 328. [2021-11-02 23:10:45,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 1.3394495412844036) internal successors, (438), 327 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) [2021-11-02 23:10:45,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 438 transitions. [2021-11-02 23:10:45,042 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 438 transitions. Word has length 33 [2021-11-02 23:10:45,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:45,042 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 438 transitions. [2021-11-02 23:10:45,042 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.625) internal successors, (26), 16 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:45,043 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 438 transitions. [2021-11-02 23:10:45,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-02 23:10:45,044 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:45,044 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:45,093 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2021-11-02 23:10:45,268 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2021-11-02 23:10:45,268 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:45,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:45,269 INFO L85 PathProgramCache]: Analyzing trace with hash -517721504, now seen corresponding path program 26 times [2021-11-02 23:10:45,269 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:45,269 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91966609] [2021-11-02 23:10:45,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:45,269 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:45,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:45,496 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-02 23:10:45,496 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:45,496 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91966609] [2021-11-02 23:10:45,497 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91966609] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:45,497 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [564473809] [2021-11-02 23:10:45,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:10:45,497 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:45,497 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:45,500 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:45,501 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-11-02 23:10:46,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:10:46,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:10:46,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-02 23:10:46,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:46,229 INFO L134 CoverageAnalysis]: Checked inductivity of 92 backedges. 0 proven. 46 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-02 23:10:46,230 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [564473809] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:46,230 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:46,230 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-11-02 23:10:46,230 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914206178] [2021-11-02 23:10:46,230 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 23:10:46,231 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:46,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 23:10:46,231 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=236, Unknown=0, NotChecked=0, Total=272 [2021-11-02 23:10:46,231 INFO L87 Difference]: Start difference. First operand 328 states and 438 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:46,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:46,726 INFO L93 Difference]: Finished difference Result 488 states and 612 transitions. [2021-11-02 23:10:46,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-11-02 23:10:46,726 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 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 35 [2021-11-02 23:10:46,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:46,728 INFO L225 Difference]: With dead ends: 488 [2021-11-02 23:10:46,728 INFO L226 Difference]: Without dead ends: 464 [2021-11-02 23:10:46,729 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=81, Invalid=569, Unknown=0, NotChecked=0, Total=650 [2021-11-02 23:10:46,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 464 states. [2021-11-02 23:10:46,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 464 to 328. [2021-11-02 23:10:46,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 1.3363914373088686) internal successors, (437), 327 states have internal predecessors, (437), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:46,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 437 transitions. [2021-11-02 23:10:46,747 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 437 transitions. Word has length 35 [2021-11-02 23:10:46,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:46,747 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 437 transitions. [2021-11-02 23:10:46,747 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:46,747 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 437 transitions. [2021-11-02 23:10:46,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-02 23:10:46,748 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:46,749 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:46,780 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2021-11-02 23:10:46,965 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:46,965 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:46,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:46,965 INFO L85 PathProgramCache]: Analyzing trace with hash -2117886592, now seen corresponding path program 27 times [2021-11-02 23:10:46,966 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:46,966 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7124998] [2021-11-02 23:10:46,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:46,966 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:46,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:47,266 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-02 23:10:47,266 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:47,285 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7124998] [2021-11-02 23:10:47,285 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7124998] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:47,286 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [179745928] [2021-11-02 23:10:47,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:10:47,286 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:47,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:47,287 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:47,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-11-02 23:10:47,999 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-02 23:10:47,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:10:48,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 56 conjunts are in the unsatisfiable core [2021-11-02 23:10:48,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:48,399 INFO L134 CoverageAnalysis]: Checked inductivity of 101 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-02 23:10:48,399 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [179745928] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:48,400 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:48,400 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 27 [2021-11-02 23:10:48,400 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937087880] [2021-11-02 23:10:48,400 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-02 23:10:48,400 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:48,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-02 23:10:48,401 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=621, Unknown=0, NotChecked=0, Total=702 [2021-11-02 23:10:48,401 INFO L87 Difference]: Start difference. First operand 328 states and 437 transitions. Second operand has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:49,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:49,011 INFO L93 Difference]: Finished difference Result 501 states and 651 transitions. [2021-11-02 23:10:49,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-11-02 23:10:49,011 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-02 23:10:49,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:49,016 INFO L225 Difference]: With dead ends: 501 [2021-11-02 23:10:49,017 INFO L226 Difference]: Without dead ends: 423 [2021-11-02 23:10:49,017 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 28 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=121, Invalid=1001, Unknown=0, NotChecked=0, Total=1122 [2021-11-02 23:10:49,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2021-11-02 23:10:49,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 328. [2021-11-02 23:10:49,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 1.327217125382263) internal successors, (434), 327 states have internal predecessors, (434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:49,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 434 transitions. [2021-11-02 23:10:49,036 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 434 transitions. Word has length 35 [2021-11-02 23:10:49,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:49,036 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 434 transitions. [2021-11-02 23:10:49,036 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:49,036 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 434 transitions. [2021-11-02 23:10:49,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-02 23:10:49,038 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:49,038 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:49,077 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-11-02 23:10:49,261 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:49,261 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:49,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:49,261 INFO L85 PathProgramCache]: Analyzing trace with hash -959033584, now seen corresponding path program 28 times [2021-11-02 23:10:49,262 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:49,262 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1109050897] [2021-11-02 23:10:49,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:49,262 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:49,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:49,538 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-02 23:10:49,538 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:49,538 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1109050897] [2021-11-02 23:10:49,539 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1109050897] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:49,539 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [389086822] [2021-11-02 23:10:49,539 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:10:49,539 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:49,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:49,540 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:49,561 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-11-02 23:10:50,350 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:10:50,350 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:10:50,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 29 conjunts are in the unsatisfiable core [2021-11-02 23:10:50,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:50,524 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 0 proven. 51 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-02 23:10:50,525 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [389086822] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:50,525 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:50,525 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2021-11-02 23:10:50,525 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2114376586] [2021-11-02 23:10:50,525 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-11-02 23:10:50,526 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:50,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-11-02 23:10:50,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=237, Unknown=0, NotChecked=0, Total=272 [2021-11-02 23:10:50,526 INFO L87 Difference]: Start difference. First operand 328 states and 434 transitions. Second operand has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:51,145 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:51,145 INFO L93 Difference]: Finished difference Result 521 states and 642 transitions. [2021-11-02 23:10:51,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-11-02 23:10:51,145 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 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 35 [2021-11-02 23:10:51,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:51,147 INFO L225 Difference]: With dead ends: 521 [2021-11-02 23:10:51,147 INFO L226 Difference]: Without dead ends: 498 [2021-11-02 23:10:51,148 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=80, Invalid=570, Unknown=0, NotChecked=0, Total=650 [2021-11-02 23:10:51,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 498 states. [2021-11-02 23:10:51,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 498 to 328. [2021-11-02 23:10:51,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 328 states, 327 states have (on average 1.3241590214067278) internal successors, (433), 327 states have internal predecessors, (433), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:51,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 328 states to 328 states and 433 transitions. [2021-11-02 23:10:51,165 INFO L78 Accepts]: Start accepts. Automaton has 328 states and 433 transitions. Word has length 35 [2021-11-02 23:10:51,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:51,165 INFO L470 AbstractCegarLoop]: Abstraction has 328 states and 433 transitions. [2021-11-02 23:10:51,165 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 1.588235294117647) internal successors, (27), 17 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:51,166 INFO L276 IsEmpty]: Start isEmpty. Operand 328 states and 433 transitions. [2021-11-02 23:10:51,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2021-11-02 23:10:51,167 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:51,167 INFO L513 BasicCegarLoop]: trace histogram [16, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:51,202 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-11-02 23:10:51,381 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-11-02 23:10:51,381 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:51,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:51,381 INFO L85 PathProgramCache]: Analyzing trace with hash 285934496, now seen corresponding path program 29 times [2021-11-02 23:10:51,382 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:51,382 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501289349] [2021-11-02 23:10:51,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:51,382 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:51,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:51,860 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-02 23:10:51,860 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:51,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501289349] [2021-11-02 23:10:51,861 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501289349] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:51,861 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526498830] [2021-11-02 23:10:51,861 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:10:51,861 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:51,861 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:51,865 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:51,881 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-11-02 23:10:53,761 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-11-02 23:10:53,761 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:10:53,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-02 23:10:53,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:53,982 INFO L134 CoverageAnalysis]: Checked inductivity of 151 backedges. 0 proven. 142 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-02 23:10:53,983 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526498830] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:53,983 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:53,983 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-11-02 23:10:53,983 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [661558653] [2021-11-02 23:10:53,984 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-02 23:10:53,984 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:53,984 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-02 23:10:53,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=503, Unknown=0, NotChecked=0, Total=552 [2021-11-02 23:10:53,985 INFO L87 Difference]: Start difference. First operand 328 states and 433 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:55,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:10:55,243 INFO L93 Difference]: Finished difference Result 681 states and 905 transitions. [2021-11-02 23:10:55,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-02 23:10:55,243 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2021-11-02 23:10:55,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:10:55,246 INFO L225 Difference]: With dead ends: 681 [2021-11-02 23:10:55,246 INFO L226 Difference]: Without dead ends: 655 [2021-11-02 23:10:55,246 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=99, Invalid=1023, Unknown=0, NotChecked=0, Total=1122 [2021-11-02 23:10:55,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 655 states. [2021-11-02 23:10:55,268 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 655 to 424. [2021-11-02 23:10:55,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 424 states, 423 states have (on average 1.2647754137115839) internal successors, (535), 423 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:55,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 424 states to 424 states and 535 transitions. [2021-11-02 23:10:55,272 INFO L78 Accepts]: Start accepts. Automaton has 424 states and 535 transitions. Word has length 35 [2021-11-02 23:10:55,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:10:55,272 INFO L470 AbstractCegarLoop]: Abstraction has 424 states and 535 transitions. [2021-11-02 23:10:55,272 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:10:55,272 INFO L276 IsEmpty]: Start isEmpty. Operand 424 states and 535 transitions. [2021-11-02 23:10:55,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-02 23:10:55,274 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:10:55,274 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:10:55,285 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Forceful destruction successful, exit code 0 [2021-11-02 23:10:55,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:55,481 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:10:55,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:10:55,482 INFO L85 PathProgramCache]: Analyzing trace with hash 63327017, now seen corresponding path program 8 times [2021-11-02 23:10:55,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:10:55,482 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1354517458] [2021-11-02 23:10:55,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:10:55,482 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:10:55,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:10:55,926 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 0 proven. 109 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:10:55,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:10:55,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1354517458] [2021-11-02 23:10:55,927 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1354517458] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:55,927 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232928162] [2021-11-02 23:10:55,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:10:55,927 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:10:55,927 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:10:55,929 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:10:55,949 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-11-02 23:10:56,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:10:56,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:10:56,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 176 conjuncts, 34 conjunts are in the unsatisfiable core [2021-11-02 23:10:56,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:10:57,070 INFO L134 CoverageAnalysis]: Checked inductivity of 109 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 37 trivial. 0 not checked. [2021-11-02 23:10:57,070 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232928162] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:10:57,070 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:10:57,070 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11] total 30 [2021-11-02 23:10:57,070 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050108654] [2021-11-02 23:10:57,071 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-02 23:10:57,071 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:10:57,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-02 23:10:57,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=811, Unknown=0, NotChecked=0, Total=870 [2021-11-02 23:10:57,071 INFO L87 Difference]: Start difference. First operand 424 states and 535 transitions. Second operand has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:16,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:12:16,116 INFO L93 Difference]: Finished difference Result 722 states and 1016 transitions. [2021-11-02 23:12:16,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-11-02 23:12:16,116 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 36 [2021-11-02 23:12:16,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:12:16,119 INFO L225 Difference]: With dead ends: 722 [2021-11-02 23:12:16,119 INFO L226 Difference]: Without dead ends: 665 [2021-11-02 23:12:16,121 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7898 ImplicationChecksByTransitivity, 73.9s TimeCoverageRelationStatistics Valid=2108, Invalid=22384, Unknown=0, NotChecked=0, Total=24492 [2021-11-02 23:12:16,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 665 states. [2021-11-02 23:12:16,149 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 665 to 453. [2021-11-02 23:12:16,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 453 states, 452 states have (on average 1.2831858407079646) internal successors, (580), 452 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:16,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 453 states to 453 states and 580 transitions. [2021-11-02 23:12:16,150 INFO L78 Accepts]: Start accepts. Automaton has 453 states and 580 transitions. Word has length 36 [2021-11-02 23:12:16,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:12:16,151 INFO L470 AbstractCegarLoop]: Abstraction has 453 states and 580 transitions. [2021-11-02 23:12:16,151 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 2.033333333333333) internal successors, (61), 30 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:16,151 INFO L276 IsEmpty]: Start isEmpty. Operand 453 states and 580 transitions. [2021-11-02 23:12:16,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2021-11-02 23:12:16,152 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:12:16,153 INFO L513 BasicCegarLoop]: trace histogram [17, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:12:16,221 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Forceful destruction successful, exit code 0 [2021-11-02 23:12:16,377 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-11-02 23:12:16,377 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:12:16,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:12:16,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1539112101, now seen corresponding path program 30 times [2021-11-02 23:12:16,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:12:16,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175144665] [2021-11-02 23:12:16,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:16,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:12:16,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:16,913 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 159 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2021-11-02 23:12:16,913 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:12:16,913 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175144665] [2021-11-02 23:12:16,914 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175144665] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:16,914 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189955312] [2021-11-02 23:12:16,914 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:12:16,914 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:12:16,914 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:12:16,915 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:12:16,937 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-11-02 23:12:17,832 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-11-02 23:12:17,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:12:17,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 96 conjuncts, 6 conjunts are in the unsatisfiable core [2021-11-02 23:12:17,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:12:18,059 INFO L134 CoverageAnalysis]: Checked inductivity of 168 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 165 trivial. 0 not checked. [2021-11-02 23:12:18,059 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189955312] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:18,059 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:12:18,060 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 5] total 27 [2021-11-02 23:12:18,060 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412637222] [2021-11-02 23:12:18,060 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-02 23:12:18,060 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:12:18,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-02 23:12:18,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=648, Unknown=0, NotChecked=0, Total=702 [2021-11-02 23:12:18,062 INFO L87 Difference]: Start difference. First operand 453 states and 580 transitions. Second operand has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 27 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:20,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:12:20,752 INFO L93 Difference]: Finished difference Result 981 states and 1257 transitions. [2021-11-02 23:12:20,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2021-11-02 23:12:20,753 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 27 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 36 [2021-11-02 23:12:20,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:12:20,757 INFO L225 Difference]: With dead ends: 981 [2021-11-02 23:12:20,757 INFO L226 Difference]: Without dead ends: 955 [2021-11-02 23:12:20,758 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 75 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1228 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=266, Invalid=5586, Unknown=0, NotChecked=0, Total=5852 [2021-11-02 23:12:20,760 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 955 states. [2021-11-02 23:12:20,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 955 to 485. [2021-11-02 23:12:20,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 1.2933884297520661) internal successors, (626), 484 states have internal predecessors, (626), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:20,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 626 transitions. [2021-11-02 23:12:20,802 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 626 transitions. Word has length 36 [2021-11-02 23:12:20,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:12:20,802 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 626 transitions. [2021-11-02 23:12:20,802 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.6666666666666667) internal successors, (45), 27 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:20,802 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 626 transitions. [2021-11-02 23:12:20,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-02 23:12:20,804 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:12:20,804 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:12:20,852 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-11-02 23:12:21,025 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-11-02 23:12:21,025 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:12:21,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:12:21,026 INFO L85 PathProgramCache]: Analyzing trace with hash -603676306, now seen corresponding path program 31 times [2021-11-02 23:12:21,026 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:12:21,026 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484994812] [2021-11-02 23:12:21,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:21,026 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:12:21,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:21,347 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-02 23:12:21,348 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:12:21,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484994812] [2021-11-02 23:12:21,348 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484994812] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:21,348 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750208415] [2021-11-02 23:12:21,348 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:12:21,349 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:12:21,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:12:21,353 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:12:21,375 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-11-02 23:12:22,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:22,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 31 conjunts are in the unsatisfiable core [2021-11-02 23:12:22,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:12:22,425 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 55 refuted. 0 times theorem prover too weak. 55 trivial. 0 not checked. [2021-11-02 23:12:22,425 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [750208415] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:22,425 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:12:22,425 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2021-11-02 23:12:22,426 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555938755] [2021-11-02 23:12:22,426 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-11-02 23:12:22,426 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:12:22,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-11-02 23:12:22,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=268, Unknown=0, NotChecked=0, Total=306 [2021-11-02 23:12:22,427 INFO L87 Difference]: Start difference. First operand 485 states and 626 transitions. Second operand has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:23,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:12:23,145 INFO L93 Difference]: Finished difference Result 675 states and 833 transitions. [2021-11-02 23:12:23,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-11-02 23:12:23,145 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-02 23:12:23,145 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:12:23,148 INFO L225 Difference]: With dead ends: 675 [2021-11-02 23:12:23,148 INFO L226 Difference]: Without dead ends: 650 [2021-11-02 23:12:23,148 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=772, Unknown=0, NotChecked=0, Total=870 [2021-11-02 23:12:23,149 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 650 states. [2021-11-02 23:12:23,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 650 to 485. [2021-11-02 23:12:23,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 1.2913223140495869) internal successors, (625), 484 states have internal predecessors, (625), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:23,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 625 transitions. [2021-11-02 23:12:23,175 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 625 transitions. Word has length 37 [2021-11-02 23:12:23,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:12:23,175 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 625 transitions. [2021-11-02 23:12:23,175 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 1.5555555555555556) internal successors, (28), 18 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:23,175 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 625 transitions. [2021-11-02 23:12:23,176 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-02 23:12:23,176 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:12:23,176 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:12:23,202 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2021-11-02 23:12:23,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:12:23,377 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:12:23,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:12:23,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1386919216, now seen corresponding path program 32 times [2021-11-02 23:12:23,377 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:12:23,377 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46625032] [2021-11-02 23:12:23,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:23,378 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:12:23,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:23,792 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 0 proven. 73 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-02 23:12:23,793 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:12:23,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46625032] [2021-11-02 23:12:23,793 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46625032] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:23,793 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596758199] [2021-11-02 23:12:23,793 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:12:23,793 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:12:23,794 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:12:23,797 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:12:23,817 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-11-02 23:12:24,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:12:24,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:12:24,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-02 23:12:24,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:12:24,872 INFO L134 CoverageAnalysis]: Checked inductivity of 119 backedges. 24 proven. 44 refuted. 0 times theorem prover too weak. 51 trivial. 0 not checked. [2021-11-02 23:12:24,872 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596758199] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:24,872 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:12:24,872 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 10] total 28 [2021-11-02 23:12:24,872 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505756838] [2021-11-02 23:12:24,873 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2021-11-02 23:12:24,873 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:12:24,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2021-11-02 23:12:24,873 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=696, Unknown=0, NotChecked=0, Total=756 [2021-11-02 23:12:24,873 INFO L87 Difference]: Start difference. First operand 485 states and 625 transitions. Second operand has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:39,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:12:39,125 INFO L93 Difference]: Finished difference Result 772 states and 971 transitions. [2021-11-02 23:12:39,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2021-11-02 23:12:39,125 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 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 37 [2021-11-02 23:12:39,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:12:39,128 INFO L225 Difference]: With dead ends: 772 [2021-11-02 23:12:39,129 INFO L226 Difference]: Without dead ends: 683 [2021-11-02 23:12:39,129 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 93 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2241 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=915, Invalid=8015, Unknown=0, NotChecked=0, Total=8930 [2021-11-02 23:12:39,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 683 states. [2021-11-02 23:12:39,151 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 683 to 528. [2021-11-02 23:12:39,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 528 states, 527 states have (on average 1.2637571157495255) internal successors, (666), 527 states have internal predecessors, (666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:39,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 528 states to 528 states and 666 transitions. [2021-11-02 23:12:39,152 INFO L78 Accepts]: Start accepts. Automaton has 528 states and 666 transitions. Word has length 37 [2021-11-02 23:12:39,153 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:12:39,153 INFO L470 AbstractCegarLoop]: Abstraction has 528 states and 666 transitions. [2021-11-02 23:12:39,153 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 1.8214285714285714) internal successors, (51), 28 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:39,153 INFO L276 IsEmpty]: Start isEmpty. Operand 528 states and 666 transitions. [2021-11-02 23:12:39,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2021-11-02 23:12:39,154 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:12:39,154 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:12:39,181 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2021-11-02 23:12:39,354 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:12:39,354 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:12:39,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:12:39,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1268822784, now seen corresponding path program 33 times [2021-11-02 23:12:39,355 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:12:39,355 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1483758245] [2021-11-02 23:12:39,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:39,355 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:12:39,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:39,625 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 61 trivial. 0 not checked. [2021-11-02 23:12:39,625 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:12:39,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1483758245] [2021-11-02 23:12:39,625 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1483758245] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:39,625 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [555453607] [2021-11-02 23:12:39,626 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:12:39,626 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:12:39,626 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:12:39,627 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:12:39,627 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-11-02 23:12:40,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-02 23:12:40,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:12:40,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 161 conjuncts, 16 conjunts are in the unsatisfiable core [2021-11-02 23:12:40,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:12:41,098 INFO L134 CoverageAnalysis]: Checked inductivity of 122 backedges. 28 proven. 12 refuted. 0 times theorem prover too weak. 82 trivial. 0 not checked. [2021-11-02 23:12:41,099 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [555453607] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:41,099 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:12:41,099 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 10] total 25 [2021-11-02 23:12:41,100 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1556389978] [2021-11-02 23:12:41,100 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 23:12:41,100 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:12:41,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 23:12:41,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=546, Unknown=0, NotChecked=0, Total=600 [2021-11-02 23:12:41,101 INFO L87 Difference]: Start difference. First operand 528 states and 666 transitions. Second operand has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:42,354 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:12:42,354 INFO L93 Difference]: Finished difference Result 840 states and 1007 transitions. [2021-11-02 23:12:42,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-02 23:12:42,355 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 37 [2021-11-02 23:12:42,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:12:42,359 INFO L225 Difference]: With dead ends: 840 [2021-11-02 23:12:42,359 INFO L226 Difference]: Without dead ends: 783 [2021-11-02 23:12:42,359 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=142, Invalid=1664, Unknown=0, NotChecked=0, Total=1806 [2021-11-02 23:12:42,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 783 states. [2021-11-02 23:12:42,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 783 to 508. [2021-11-02 23:12:42,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 508 states, 507 states have (on average 1.2583826429980276) internal successors, (638), 507 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:42,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 508 states to 508 states and 638 transitions. [2021-11-02 23:12:42,401 INFO L78 Accepts]: Start accepts. Automaton has 508 states and 638 transitions. Word has length 37 [2021-11-02 23:12:42,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:12:42,401 INFO L470 AbstractCegarLoop]: Abstraction has 508 states and 638 transitions. [2021-11-02 23:12:42,401 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.52) internal successors, (38), 25 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:12:42,401 INFO L276 IsEmpty]: Start isEmpty. Operand 508 states and 638 transitions. [2021-11-02 23:12:42,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-02 23:12:42,402 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:12:42,402 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:12:42,408 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-11-02 23:12:42,602 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-11-02 23:12:42,603 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:12:42,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:12:42,603 INFO L85 PathProgramCache]: Analyzing trace with hash -1867198964, now seen corresponding path program 34 times [2021-11-02 23:12:42,604 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:12:42,604 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707528937] [2021-11-02 23:12:42,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:12:42,604 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:12:42,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:12:43,004 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 46 trivial. 0 not checked. [2021-11-02 23:12:43,005 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:12:43,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707528937] [2021-11-02 23:12:43,005 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707528937] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:43,005 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829620473] [2021-11-02 23:12:43,005 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:12:43,005 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:12:43,005 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:12:43,006 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:12:43,007 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-11-02 23:12:43,759 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:12:43,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:12:43,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-02 23:12:43,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:12:44,142 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 21 proven. 58 refuted. 0 times theorem prover too weak. 48 trivial. 0 not checked. [2021-11-02 23:12:44,142 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [829620473] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:12:44,143 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:12:44,143 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 11] total 30 [2021-11-02 23:12:44,143 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743677222] [2021-11-02 23:12:44,143 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2021-11-02 23:12:44,143 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:12:44,143 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2021-11-02 23:12:44,144 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=805, Unknown=0, NotChecked=0, Total=870 [2021-11-02 23:12:44,144 INFO L87 Difference]: Start difference. First operand 508 states and 638 transitions. Second operand has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:11,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:11,585 INFO L93 Difference]: Finished difference Result 710 states and 899 transitions. [2021-11-02 23:13:11,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-11-02 23:13:11,586 INFO L78 Accepts]: Start accepts. Automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-02 23:13:11,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:11,589 INFO L225 Difference]: With dead ends: 710 [2021-11-02 23:13:11,589 INFO L226 Difference]: Without dead ends: 653 [2021-11-02 23:13:11,590 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 149 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 108 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3208 ImplicationChecksByTransitivity, 22.8s TimeCoverageRelationStatistics Valid=1155, Invalid=10835, Unknown=0, NotChecked=0, Total=11990 [2021-11-02 23:13:11,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 653 states. [2021-11-02 23:13:11,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 653 to 468. [2021-11-02 23:13:11,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 468 states, 467 states have (on average 1.271948608137045) internal successors, (594), 467 states have internal predecessors, (594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:11,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 468 states to 468 states and 594 transitions. [2021-11-02 23:13:11,626 INFO L78 Accepts]: Start accepts. Automaton has 468 states and 594 transitions. Word has length 38 [2021-11-02 23:13:11,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:11,626 INFO L470 AbstractCegarLoop]: Abstraction has 468 states and 594 transitions. [2021-11-02 23:13:11,626 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 1.8) internal successors, (54), 30 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:11,626 INFO L276 IsEmpty]: Start isEmpty. Operand 468 states and 594 transitions. [2021-11-02 23:13:11,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 39 [2021-11-02 23:13:11,628 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:11,628 INFO L513 BasicCegarLoop]: trace histogram [18, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:11,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Forceful destruction successful, exit code 0 [2021-11-02 23:13:11,843 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:11,843 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:11,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:11,843 INFO L85 PathProgramCache]: Analyzing trace with hash -314995349, now seen corresponding path program 35 times [2021-11-02 23:13:11,843 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:11,843 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150649160] [2021-11-02 23:13:11,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:11,844 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:11,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:12,323 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 177 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-02 23:13:12,324 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:12,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150649160] [2021-11-02 23:13:12,324 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150649160] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:12,324 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1955049094] [2021-11-02 23:13:12,324 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:13:12,325 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:12,325 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:12,338 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:12,353 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-11-02 23:13:16,200 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2021-11-02 23:13:16,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:13:16,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 53 conjunts are in the unsatisfiable core [2021-11-02 23:13:16,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:16,470 INFO L134 CoverageAnalysis]: Checked inductivity of 189 backedges. 0 proven. 183 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2021-11-02 23:13:16,470 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1955049094] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:16,470 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:13:16,471 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-11-02 23:13:16,471 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651278262] [2021-11-02 23:13:16,471 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-02 23:13:16,471 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:16,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-02 23:13:16,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=597, Unknown=0, NotChecked=0, Total=650 [2021-11-02 23:13:16,472 INFO L87 Difference]: Start difference. First operand 468 states and 594 transitions. Second operand has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:18,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:18,105 INFO L93 Difference]: Finished difference Result 904 states and 1174 transitions. [2021-11-02 23:13:18,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-02 23:13:18,106 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 38 [2021-11-02 23:13:18,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:18,109 INFO L225 Difference]: With dead ends: 904 [2021-11-02 23:13:18,109 INFO L226 Difference]: Without dead ends: 863 [2021-11-02 23:13:18,110 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=103, Invalid=1157, Unknown=0, NotChecked=0, Total=1260 [2021-11-02 23:13:18,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 863 states. [2021-11-02 23:13:18,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 863 to 485. [2021-11-02 23:13:18,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 485 states, 484 states have (on average 1.2768595041322315) internal successors, (618), 484 states have internal predecessors, (618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:18,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 485 states to 485 states and 618 transitions. [2021-11-02 23:13:18,135 INFO L78 Accepts]: Start accepts. Automaton has 485 states and 618 transitions. Word has length 38 [2021-11-02 23:13:18,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:18,135 INFO L470 AbstractCegarLoop]: Abstraction has 485 states and 618 transitions. [2021-11-02 23:13:18,135 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.6538461538461537) internal successors, (43), 26 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:18,136 INFO L276 IsEmpty]: Start isEmpty. Operand 485 states and 618 transitions. [2021-11-02 23:13:18,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-02 23:13:18,137 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:18,137 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:18,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-11-02 23:13:18,337 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:18,338 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:18,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:18,338 INFO L85 PathProgramCache]: Analyzing trace with hash 378745503, now seen corresponding path program 9 times [2021-11-02 23:13:18,339 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:18,339 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329048814] [2021-11-02 23:13:18,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:18,339 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:18,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:18,815 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:18,816 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:18,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329048814] [2021-11-02 23:13:18,816 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329048814] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:18,816 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [497564343] [2021-11-02 23:13:18,816 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:13:18,816 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:18,816 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:18,817 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:18,818 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-11-02 23:13:20,059 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2021-11-02 23:13:20,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:13:20,063 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-02 23:13:20,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:20,331 INFO L134 CoverageAnalysis]: Checked inductivity of 136 backedges. 0 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:13:20,331 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [497564343] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:20,331 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:13:20,332 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 22] total 23 [2021-11-02 23:13:20,332 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022926468] [2021-11-02 23:13:20,332 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-02 23:13:20,332 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:20,333 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-02 23:13:20,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=461, Unknown=0, NotChecked=0, Total=506 [2021-11-02 23:13:20,333 INFO L87 Difference]: Start difference. First operand 485 states and 618 transitions. Second operand has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:23,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:23,498 INFO L93 Difference]: Finished difference Result 754 states and 1052 transitions. [2021-11-02 23:13:23,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 116 states. [2021-11-02 23:13:23,498 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-02 23:13:23,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:23,501 INFO L225 Difference]: With dead ends: 754 [2021-11-02 23:13:23,502 INFO L226 Difference]: Without dead ends: 695 [2021-11-02 23:13:23,502 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 164 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 115 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4371 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=441, Invalid=13131, Unknown=0, NotChecked=0, Total=13572 [2021-11-02 23:13:23,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 695 states. [2021-11-02 23:13:23,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 695 to 507. [2021-11-02 23:13:23,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 1.2826086956521738) internal successors, (649), 506 states have internal predecessors, (649), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:23,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 649 transitions. [2021-11-02 23:13:23,528 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 649 transitions. Word has length 39 [2021-11-02 23:13:23,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:23,528 INFO L470 AbstractCegarLoop]: Abstraction has 507 states and 649 transitions. [2021-11-02 23:13:23,528 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.7826086956521738) internal successors, (41), 23 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:23,528 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 649 transitions. [2021-11-02 23:13:23,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-02 23:13:23,529 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:23,529 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:23,539 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Ended with exit code 0 [2021-11-02 23:13:23,733 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-11-02 23:13:23,733 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:23,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:23,734 INFO L85 PathProgramCache]: Analyzing trace with hash 1796390624, now seen corresponding path program 36 times [2021-11-02 23:13:23,734 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:23,734 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399197925] [2021-11-02 23:13:23,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:23,735 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:23,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:24,086 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-02 23:13:24,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:24,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399197925] [2021-11-02 23:13:24,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [399197925] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:24,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915645191] [2021-11-02 23:13:24,087 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:13:24,087 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:24,087 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:24,088 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:24,105 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-11-02 23:13:25,515 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-02 23:13:25,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:13:25,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-02 23:13:25,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:25,694 INFO L134 CoverageAnalysis]: Checked inductivity of 130 backedges. 0 proven. 65 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-02 23:13:25,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915645191] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:25,694 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:13:25,694 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2021-11-02 23:13:25,695 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [743332703] [2021-11-02 23:13:25,695 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-11-02 23:13:25,695 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:25,696 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-11-02 23:13:25,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=302, Unknown=0, NotChecked=0, Total=342 [2021-11-02 23:13:25,696 INFO L87 Difference]: Start difference. First operand 507 states and 649 transitions. Second operand has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:26,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:26,502 INFO L93 Difference]: Finished difference Result 732 states and 895 transitions. [2021-11-02 23:13:26,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-11-02 23:13:26,503 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-02 23:13:26,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:26,506 INFO L225 Difference]: With dead ends: 732 [2021-11-02 23:13:26,506 INFO L226 Difference]: Without dead ends: 706 [2021-11-02 23:13:26,507 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=110, Invalid=946, Unknown=0, NotChecked=0, Total=1056 [2021-11-02 23:13:26,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 706 states. [2021-11-02 23:13:26,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 706 to 507. [2021-11-02 23:13:26,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 507 states, 506 states have (on average 1.2806324110671936) internal successors, (648), 506 states have internal predecessors, (648), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:26,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 507 states to 507 states and 648 transitions. [2021-11-02 23:13:26,536 INFO L78 Accepts]: Start accepts. Automaton has 507 states and 648 transitions. Word has length 39 [2021-11-02 23:13:26,536 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:26,536 INFO L470 AbstractCegarLoop]: Abstraction has 507 states and 648 transitions. [2021-11-02 23:13:26,537 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 19 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:26,537 INFO L276 IsEmpty]: Start isEmpty. Operand 507 states and 648 transitions. [2021-11-02 23:13:26,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2021-11-02 23:13:26,538 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:26,538 INFO L513 BasicCegarLoop]: trace histogram [19, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:26,568 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-11-02 23:13:26,739 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:26,739 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:26,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:26,739 INFO L85 PathProgramCache]: Analyzing trace with hash -287166512, now seen corresponding path program 37 times [2021-11-02 23:13:26,739 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:26,739 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764746728] [2021-11-02 23:13:26,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:26,740 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:26,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:27,248 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-02 23:13:27,248 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:27,248 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764746728] [2021-11-02 23:13:27,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764746728] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:27,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435170979] [2021-11-02 23:13:27,249 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:13:27,249 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:27,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:27,256 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:27,257 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-11-02 23:13:28,089 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:28,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 191 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-02 23:13:28,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:28,345 INFO L134 CoverageAnalysis]: Checked inductivity of 208 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-02 23:13:28,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435170979] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:28,346 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:13:28,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-11-02 23:13:28,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214033101] [2021-11-02 23:13:28,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-02 23:13:28,346 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:28,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-02 23:13:28,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=647, Unknown=0, NotChecked=0, Total=702 [2021-11-02 23:13:28,347 INFO L87 Difference]: Start difference. First operand 507 states and 648 transitions. Second operand has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:30,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:30,088 INFO L93 Difference]: Finished difference Result 997 states and 1300 transitions. [2021-11-02 23:13:30,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-02 23:13:30,089 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 39 [2021-11-02 23:13:30,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:30,093 INFO L225 Difference]: With dead ends: 997 [2021-11-02 23:13:30,093 INFO L226 Difference]: Without dead ends: 956 [2021-11-02 23:13:30,094 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=105, Invalid=1227, Unknown=0, NotChecked=0, Total=1332 [2021-11-02 23:13:30,095 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 956 states. [2021-11-02 23:13:30,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 956 to 524. [2021-11-02 23:13:30,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 524 states, 523 states have (on average 1.2848948374760993) internal successors, (672), 523 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:30,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 524 states to 524 states and 672 transitions. [2021-11-02 23:13:30,126 INFO L78 Accepts]: Start accepts. Automaton has 524 states and 672 transitions. Word has length 39 [2021-11-02 23:13:30,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:30,126 INFO L470 AbstractCegarLoop]: Abstraction has 524 states and 672 transitions. [2021-11-02 23:13:30,127 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:30,127 INFO L276 IsEmpty]: Start isEmpty. Operand 524 states and 672 transitions. [2021-11-02 23:13:30,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-02 23:13:30,134 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:30,134 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 7, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:30,159 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-11-02 23:13:30,335 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:30,335 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:30,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:30,335 INFO L85 PathProgramCache]: Analyzing trace with hash 472923898, now seen corresponding path program 38 times [2021-11-02 23:13:30,335 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:30,336 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870351476] [2021-11-02 23:13:30,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:30,336 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:30,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:30,735 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 0 proven. 83 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-02 23:13:30,735 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:30,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870351476] [2021-11-02 23:13:30,735 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870351476] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:30,735 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [484584628] [2021-11-02 23:13:30,735 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:13:30,735 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:30,736 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:30,739 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:30,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-11-02 23:13:31,726 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:13:31,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:13:31,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 196 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-02 23:13:31,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:32,075 INFO L134 CoverageAnalysis]: Checked inductivity of 141 backedges. 30 proven. 41 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-02 23:13:32,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [484584628] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:32,075 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:13:32,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 10] total 29 [2021-11-02 23:13:32,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352730366] [2021-11-02 23:13:32,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-02 23:13:32,076 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:32,076 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-02 23:13:32,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=750, Unknown=0, NotChecked=0, Total=812 [2021-11-02 23:13:32,077 INFO L87 Difference]: Start difference. First operand 524 states and 672 transitions. Second operand has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:46,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:46,921 INFO L93 Difference]: Finished difference Result 856 states and 1064 transitions. [2021-11-02 23:13:46,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 94 states. [2021-11-02 23:13:46,921 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-02 23:13:46,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:46,924 INFO L225 Difference]: With dead ends: 856 [2021-11-02 23:13:46,924 INFO L226 Difference]: Without dead ends: 764 [2021-11-02 23:13:46,925 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3130 ImplicationChecksByTransitivity, 11.9s TimeCoverageRelationStatistics Valid=1050, Invalid=10506, Unknown=0, NotChecked=0, Total=11556 [2021-11-02 23:13:46,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 764 states. [2021-11-02 23:13:46,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 764 to 569. [2021-11-02 23:13:46,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 569 states, 568 states have (on average 1.2588028169014085) internal successors, (715), 568 states have internal predecessors, (715), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:46,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 569 states to 569 states and 715 transitions. [2021-11-02 23:13:46,949 INFO L78 Accepts]: Start accepts. Automaton has 569 states and 715 transitions. Word has length 40 [2021-11-02 23:13:46,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:46,949 INFO L470 AbstractCegarLoop]: Abstraction has 569 states and 715 transitions. [2021-11-02 23:13:46,949 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.793103448275862) internal successors, (52), 29 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:46,950 INFO L276 IsEmpty]: Start isEmpty. Operand 569 states and 715 transitions. [2021-11-02 23:13:46,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2021-11-02 23:13:46,950 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:46,950 INFO L513 BasicCegarLoop]: trace histogram [20, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:46,975 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Ended with exit code 0 [2021-11-02 23:13:47,153 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2021-11-02 23:13:47,153 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:47,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:47,153 INFO L85 PathProgramCache]: Analyzing trace with hash 575527435, now seen corresponding path program 39 times [2021-11-02 23:13:47,153 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:47,154 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484451295] [2021-11-02 23:13:47,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:47,154 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:47,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:47,616 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 216 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2021-11-02 23:13:47,616 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:47,616 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484451295] [2021-11-02 23:13:47,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [484451295] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:47,617 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638730689] [2021-11-02 23:13:47,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:13:47,617 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:47,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:47,618 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:47,619 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-11-02 23:13:48,374 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-02 23:13:48,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:13:48,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 30 conjunts are in the unsatisfiable core [2021-11-02 23:13:48,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:48,726 INFO L134 CoverageAnalysis]: Checked inductivity of 228 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 210 trivial. 0 not checked. [2021-11-02 23:13:48,726 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638730689] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:48,726 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:13:48,726 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 11] total 36 [2021-11-02 23:13:48,726 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778567506] [2021-11-02 23:13:48,727 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-02 23:13:48,727 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:48,727 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-02 23:13:48,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=1187, Unknown=0, NotChecked=0, Total=1260 [2021-11-02 23:13:48,728 INFO L87 Difference]: Start difference. First operand 569 states and 715 transitions. Second operand has 36 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 36 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:52,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:13:52,849 INFO L93 Difference]: Finished difference Result 1124 states and 1464 transitions. [2021-11-02 23:13:52,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 91 states. [2021-11-02 23:13:52,849 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 36 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 40 [2021-11-02 23:13:52,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:13:52,854 INFO L225 Difference]: With dead ends: 1124 [2021-11-02 23:13:52,854 INFO L226 Difference]: Without dead ends: 1067 [2021-11-02 23:13:52,855 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 127 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1779 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=332, Invalid=8788, Unknown=0, NotChecked=0, Total=9120 [2021-11-02 23:13:52,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1067 states. [2021-11-02 23:13:52,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1067 to 497. [2021-11-02 23:13:52,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 497 states, 496 states have (on average 1.3286290322580645) internal successors, (659), 496 states have internal predecessors, (659), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:52,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 497 states to 497 states and 659 transitions. [2021-11-02 23:13:52,883 INFO L78 Accepts]: Start accepts. Automaton has 497 states and 659 transitions. Word has length 40 [2021-11-02 23:13:52,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:13:52,883 INFO L470 AbstractCegarLoop]: Abstraction has 497 states and 659 transitions. [2021-11-02 23:13:52,884 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 36 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:13:52,884 INFO L276 IsEmpty]: Start isEmpty. Operand 497 states and 659 transitions. [2021-11-02 23:13:52,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-02 23:13:52,884 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:13:52,885 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 8, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:13:52,911 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2021-11-02 23:13:53,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:53,089 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:13:53,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:13:53,089 INFO L85 PathProgramCache]: Analyzing trace with hash -1403398624, now seen corresponding path program 40 times [2021-11-02 23:13:53,090 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:13:53,090 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104202866] [2021-11-02 23:13:53,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:13:53,090 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:13:53,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:13:53,489 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 0 proven. 91 refuted. 0 times theorem prover too weak. 58 trivial. 0 not checked. [2021-11-02 23:13:53,490 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:13:53,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104202866] [2021-11-02 23:13:53,490 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104202866] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:53,490 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904671791] [2021-11-02 23:13:53,490 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:13:53,490 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:13:53,490 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:13:53,491 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:13:53,492 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-11-02 23:13:54,376 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:13:54,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:13:54,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-02 23:13:54,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:13:54,796 INFO L134 CoverageAnalysis]: Checked inductivity of 149 backedges. 30 proven. 54 refuted. 0 times theorem prover too weak. 65 trivial. 0 not checked. [2021-11-02 23:13:54,796 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [904671791] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:13:54,796 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:13:54,796 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 11] total 31 [2021-11-02 23:13:54,796 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792334701] [2021-11-02 23:13:54,797 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2021-11-02 23:13:54,797 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:13:54,797 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2021-11-02 23:13:54,797 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=863, Unknown=0, NotChecked=0, Total=930 [2021-11-02 23:13:54,798 INFO L87 Difference]: Start difference. First operand 497 states and 659 transitions. Second operand has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 31 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:14:20,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:14:20,275 INFO L93 Difference]: Finished difference Result 745 states and 977 transitions. [2021-11-02 23:14:20,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 109 states. [2021-11-02 23:14:20,276 INFO L78 Accepts]: Start accepts. Automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 31 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-02 23:14:20,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:14:20,279 INFO L225 Difference]: With dead ends: 745 [2021-11-02 23:14:20,279 INFO L226 Difference]: Without dead ends: 677 [2021-11-02 23:14:20,281 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 123 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4429 ImplicationChecksByTransitivity, 21.7s TimeCoverageRelationStatistics Valid=1345, Invalid=14155, Unknown=0, NotChecked=0, Total=15500 [2021-11-02 23:14:20,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 677 states. [2021-11-02 23:14:20,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 677 to 470. [2021-11-02 23:14:20,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 470 states, 469 states have (on average 1.3390191897654584) internal successors, (628), 469 states have internal predecessors, (628), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:14:20,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 470 states to 470 states and 628 transitions. [2021-11-02 23:14:20,307 INFO L78 Accepts]: Start accepts. Automaton has 470 states and 628 transitions. Word has length 41 [2021-11-02 23:14:20,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:14:20,307 INFO L470 AbstractCegarLoop]: Abstraction has 470 states and 628 transitions. [2021-11-02 23:14:20,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 31 states, 31 states have (on average 1.7741935483870968) internal successors, (55), 31 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:14:20,307 INFO L276 IsEmpty]: Start isEmpty. Operand 470 states and 628 transitions. [2021-11-02 23:14:20,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-02 23:14:20,308 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:14:20,308 INFO L513 BasicCegarLoop]: trace histogram [10, 10, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:14:20,335 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-11-02 23:14:20,508 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:14:20,509 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:14:20,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:14:20,509 INFO L85 PathProgramCache]: Analyzing trace with hash 1772418511, now seen corresponding path program 10 times [2021-11-02 23:14:20,510 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:14:20,510 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702930774] [2021-11-02 23:14:20,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:14:20,510 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:14:20,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:14:20,862 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 56 trivial. 0 not checked. [2021-11-02 23:14:20,863 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:14:20,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702930774] [2021-11-02 23:14:20,863 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702930774] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:14:20,863 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477643600] [2021-11-02 23:14:20,863 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:14:20,863 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:14:20,863 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:14:20,864 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:14:20,867 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2021-11-02 23:14:21,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:14:21,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:14:21,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 40 conjunts are in the unsatisfiable core [2021-11-02 23:14:21,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:14:22,171 INFO L134 CoverageAnalysis]: Checked inductivity of 156 backedges. 18 proven. 81 refuted. 0 times theorem prover too weak. 57 trivial. 0 not checked. [2021-11-02 23:14:22,171 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477643600] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:14:22,172 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:14:22,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 12] total 33 [2021-11-02 23:14:22,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395850727] [2021-11-02 23:14:22,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-02 23:14:22,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:14:22,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-02 23:14:22,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=984, Unknown=0, NotChecked=0, Total=1056 [2021-11-02 23:14:22,173 INFO L87 Difference]: Start difference. First operand 470 states and 628 transitions. Second operand has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:15:25,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:15:25,076 INFO L93 Difference]: Finished difference Result 794 states and 1057 transitions. [2021-11-02 23:15:25,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 124 states. [2021-11-02 23:15:25,076 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2021-11-02 23:15:25,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:15:25,079 INFO L225 Difference]: With dead ends: 794 [2021-11-02 23:15:25,080 INFO L226 Difference]: Without dead ends: 725 [2021-11-02 23:15:25,081 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 184 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5989 ImplicationChecksByTransitivity, 56.8s TimeCoverageRelationStatistics Valid=1713, Invalid=18309, Unknown=0, NotChecked=0, Total=20022 [2021-11-02 23:15:25,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 725 states. [2021-11-02 23:15:25,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 725 to 509. [2021-11-02 23:15:25,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 1.3366141732283465) internal successors, (679), 508 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:15:25,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 679 transitions. [2021-11-02 23:15:25,107 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 679 transitions. Word has length 41 [2021-11-02 23:15:25,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:15:25,108 INFO L470 AbstractCegarLoop]: Abstraction has 509 states and 679 transitions. [2021-11-02 23:15:25,108 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.7575757575757576) internal successors, (58), 33 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:15:25,108 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 679 transitions. [2021-11-02 23:15:25,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2021-11-02 23:15:25,109 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:15:25,109 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:15:25,152 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Ended with exit code 0 [2021-11-02 23:15:25,325 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-11-02 23:15:25,325 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:15:25,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:15:25,325 INFO L85 PathProgramCache]: Analyzing trace with hash -165066130, now seen corresponding path program 41 times [2021-11-02 23:15:25,325 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:15:25,326 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245440757] [2021-11-02 23:15:25,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:15:25,326 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:15:25,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:25,693 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-02 23:15:25,693 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:15:25,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245440757] [2021-11-02 23:15:25,694 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245440757] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:15:25,694 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704266779] [2021-11-02 23:15:25,694 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:15:25,694 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:15:25,694 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:15:25,697 INFO L229 MonitoredProcess]: Starting monitored process 66 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:15:25,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Waiting until timeout for monitored process [2021-11-02 23:15:30,222 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-02 23:15:30,222 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:15:30,226 INFO L263 TraceCheckSpWp]: Trace formula consists of 201 conjuncts, 36 conjunts are in the unsatisfiable core [2021-11-02 23:15:30,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:15:30,412 INFO L134 CoverageAnalysis]: Checked inductivity of 152 backedges. 0 proven. 76 refuted. 0 times theorem prover too weak. 76 trivial. 0 not checked. [2021-11-02 23:15:30,413 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704266779] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:15:30,413 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:15:30,413 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2021-11-02 23:15:30,413 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690111654] [2021-11-02 23:15:30,413 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-02 23:15:30,413 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:15:30,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-02 23:15:30,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=338, Unknown=0, NotChecked=0, Total=380 [2021-11-02 23:15:30,414 INFO L87 Difference]: Start difference. First operand 509 states and 679 transitions. Second operand has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:15:31,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:15:31,236 INFO L93 Difference]: Finished difference Result 771 states and 966 transitions. [2021-11-02 23:15:31,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-11-02 23:15:31,236 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 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 41 [2021-11-02 23:15:31,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:15:31,239 INFO L225 Difference]: With dead ends: 771 [2021-11-02 23:15:31,239 INFO L226 Difference]: Without dead ends: 744 [2021-11-02 23:15:31,240 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 41 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=117, Invalid=1073, Unknown=0, NotChecked=0, Total=1190 [2021-11-02 23:15:31,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 744 states. [2021-11-02 23:15:31,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 744 to 509. [2021-11-02 23:15:31,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 509 states, 508 states have (on average 1.3346456692913387) internal successors, (678), 508 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:15:31,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 509 states to 509 states and 678 transitions. [2021-11-02 23:15:31,265 INFO L78 Accepts]: Start accepts. Automaton has 509 states and 678 transitions. Word has length 41 [2021-11-02 23:15:31,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:15:31,265 INFO L470 AbstractCegarLoop]: Abstraction has 509 states and 678 transitions. [2021-11-02 23:15:31,265 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 1.5) internal successors, (30), 20 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:15:31,266 INFO L276 IsEmpty]: Start isEmpty. Operand 509 states and 678 transitions. [2021-11-02 23:15:31,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2021-11-02 23:15:31,266 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:15:31,266 INFO L513 BasicCegarLoop]: trace histogram [7, 7, 7, 7, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:15:31,273 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (66)] Forceful destruction successful, exit code 0 [2021-11-02 23:15:31,469 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2021-11-02 23:15:31,469 INFO L402 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:15:31,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:15:31,470 INFO L85 PathProgramCache]: Analyzing trace with hash -1253664039, now seen corresponding path program 9 times [2021-11-02 23:15:31,470 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:15:31,470 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819403162] [2021-11-02 23:15:31,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:15:31,470 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:15:31,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:15:31,769 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 25 proven. 34 refuted. 0 times theorem prover too weak. 59 trivial. 0 not checked. [2021-11-02 23:15:31,769 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:15:31,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819403162] [2021-11-02 23:15:31,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [819403162] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:15:31,770 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1503981348] [2021-11-02 23:15:31,770 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:15:31,770 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:15:31,770 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:15:31,771 INFO L229 MonitoredProcess]: Starting monitored process 67 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:15:31,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Waiting until timeout for monitored process [2021-11-02 23:15:33,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-11-02 23:15:33,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:15:33,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 22 conjunts are in the unsatisfiable core [2021-11-02 23:15:33,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:15:33,598 INFO L134 CoverageAnalysis]: Checked inductivity of 118 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 84 trivial. 0 not checked. [2021-11-02 23:15:33,598 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1503981348] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:15:33,599 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:15:33,599 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 10] total 23 [2021-11-02 23:15:33,600 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872132504] [2021-11-02 23:15:33,600 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-02 23:15:33,600 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:15:33,601 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-02 23:15:33,601 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=366, Unknown=0, NotChecked=0, Total=506 [2021-11-02 23:15:33,601 INFO L87 Difference]: Start difference. First operand 509 states and 678 transitions. Second operand has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:01,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:16:01,743 INFO L93 Difference]: Finished difference Result 909 states and 1291 transitions. [2021-11-02 23:16:01,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-02 23:16:01,743 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 42 [2021-11-02 23:16:01,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:16:01,747 INFO L225 Difference]: With dead ends: 909 [2021-11-02 23:16:01,747 INFO L226 Difference]: Without dead ends: 832 [2021-11-02 23:16:01,748 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 572 ImplicationChecksByTransitivity, 26.5s TimeCoverageRelationStatistics Valid=573, Invalid=1589, Unknown=0, NotChecked=0, Total=2162 [2021-11-02 23:16:01,749 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 832 states. [2021-11-02 23:16:01,780 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 832 to 634. [2021-11-02 23:16:01,780 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 633 states have (on average 1.377567140600316) internal successors, (872), 633 states have internal predecessors, (872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:01,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 872 transitions. [2021-11-02 23:16:01,781 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 872 transitions. Word has length 42 [2021-11-02 23:16:01,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:16:01,781 INFO L470 AbstractCegarLoop]: Abstraction has 634 states and 872 transitions. [2021-11-02 23:16:01,781 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.9565217391304348) internal successors, (45), 23 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:01,781 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 872 transitions. [2021-11-02 23:16:01,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-02 23:16:01,782 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:16:01,782 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:16:01,809 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (67)] Forceful destruction successful, exit code 0 [2021-11-02 23:16:01,983 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:16:01,983 INFO L402 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:16:01,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:16:01,983 INFO L85 PathProgramCache]: Analyzing trace with hash 499260048, now seen corresponding path program 42 times [2021-11-02 23:16:01,984 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:16:01,984 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130521330] [2021-11-02 23:16:01,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:16:01,984 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:16:02,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:16:02,299 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-02 23:16:02,299 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:16:02,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130521330] [2021-11-02 23:16:02,300 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130521330] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:16:02,300 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411383890] [2021-11-02 23:16:02,300 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:16:02,300 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:16:02,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:16:02,301 INFO L229 MonitoredProcess]: Starting monitored process 68 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:16:02,301 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Waiting until timeout for monitored process [2021-11-02 23:16:03,614 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2021-11-02 23:16:03,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:16:03,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-02 23:16:03,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:16:03,800 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 81 trivial. 0 not checked. [2021-11-02 23:16:03,800 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411383890] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:16:03,800 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:16:03,800 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-11-02 23:16:03,801 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517646095] [2021-11-02 23:16:03,801 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 23:16:03,801 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:16:03,801 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 23:16:03,801 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=375, Unknown=0, NotChecked=0, Total=420 [2021-11-02 23:16:03,802 INFO L87 Difference]: Start difference. First operand 634 states and 872 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:04,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:16:04,610 INFO L93 Difference]: Finished difference Result 879 states and 1142 transitions. [2021-11-02 23:16:04,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-11-02 23:16:04,611 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-02 23:16:04,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:16:04,616 INFO L225 Difference]: With dead ends: 879 [2021-11-02 23:16:04,616 INFO L226 Difference]: Without dead ends: 850 [2021-11-02 23:16:04,617 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=135, Invalid=1347, Unknown=0, NotChecked=0, Total=1482 [2021-11-02 23:16:04,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 850 states. [2021-11-02 23:16:04,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 850 to 634. [2021-11-02 23:16:04,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 633 states have (on average 1.3759873617693523) internal successors, (871), 633 states have internal predecessors, (871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:04,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 871 transitions. [2021-11-02 23:16:04,653 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 871 transitions. Word has length 43 [2021-11-02 23:16:04,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:16:04,654 INFO L470 AbstractCegarLoop]: Abstraction has 634 states and 871 transitions. [2021-11-02 23:16:04,654 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:04,654 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 871 transitions. [2021-11-02 23:16:04,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-02 23:16:04,656 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:16:04,656 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:16:04,673 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (68)] Forceful destruction successful, exit code 0 [2021-11-02 23:16:04,864 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:16:04,864 INFO L402 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:16:04,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:16:04,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1911651168, now seen corresponding path program 43 times [2021-11-02 23:16:04,865 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:16:04,865 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509404660] [2021-11-02 23:16:04,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:16:04,865 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:16:04,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:16:05,287 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-02 23:16:05,287 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:16:05,287 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509404660] [2021-11-02 23:16:05,288 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509404660] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:16:05,288 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1644597817] [2021-11-02 23:16:05,288 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:16:05,288 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:16:05,288 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:16:05,289 INFO L229 MonitoredProcess]: Starting monitored process 69 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:16:05,309 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Waiting until timeout for monitored process [2021-11-02 23:16:06,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:16:06,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 37 conjunts are in the unsatisfiable core [2021-11-02 23:16:06,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:16:06,718 INFO L134 CoverageAnalysis]: Checked inductivity of 176 backedges. 0 proven. 88 refuted. 0 times theorem prover too weak. 88 trivial. 0 not checked. [2021-11-02 23:16:06,718 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1644597817] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:16:06,718 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:16:06,718 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2021-11-02 23:16:06,719 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316489693] [2021-11-02 23:16:06,719 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2021-11-02 23:16:06,719 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:16:06,719 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2021-11-02 23:16:06,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=376, Unknown=0, NotChecked=0, Total=420 [2021-11-02 23:16:06,719 INFO L87 Difference]: Start difference. First operand 634 states and 871 transitions. Second operand has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:07,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:16:07,703 INFO L93 Difference]: Finished difference Result 921 states and 1185 transitions. [2021-11-02 23:16:07,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-11-02 23:16:07,704 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2021-11-02 23:16:07,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:16:07,707 INFO L225 Difference]: With dead ends: 921 [2021-11-02 23:16:07,707 INFO L226 Difference]: Without dead ends: 893 [2021-11-02 23:16:07,708 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 43 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=119, Invalid=1141, Unknown=0, NotChecked=0, Total=1260 [2021-11-02 23:16:07,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 893 states. [2021-11-02 23:16:07,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 893 to 634. [2021-11-02 23:16:07,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 634 states, 633 states have (on average 1.3744075829383886) internal successors, (870), 633 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:07,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 634 states to 634 states and 870 transitions. [2021-11-02 23:16:07,745 INFO L78 Accepts]: Start accepts. Automaton has 634 states and 870 transitions. Word has length 43 [2021-11-02 23:16:07,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:16:07,745 INFO L470 AbstractCegarLoop]: Abstraction has 634 states and 870 transitions. [2021-11-02 23:16:07,746 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 1.4761904761904763) internal successors, (31), 21 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:07,746 INFO L276 IsEmpty]: Start isEmpty. Operand 634 states and 870 transitions. [2021-11-02 23:16:07,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2021-11-02 23:16:07,747 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:16:07,747 INFO L513 BasicCegarLoop]: trace histogram [21, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:16:07,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (69)] Forceful destruction successful, exit code 0 [2021-11-02 23:16:07,947 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2021-11-02 23:16:07,947 INFO L402 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:16:07,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:16:07,948 INFO L85 PathProgramCache]: Analyzing trace with hash -78262066, now seen corresponding path program 44 times [2021-11-02 23:16:07,948 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:16:07,948 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602851728] [2021-11-02 23:16:07,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:16:07,948 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:16:07,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:16:08,636 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 0 proven. 241 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-02 23:16:08,636 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:16:08,636 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602851728] [2021-11-02 23:16:08,637 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [602851728] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:16:08,637 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326816809] [2021-11-02 23:16:08,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:16:08,637 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:16:08,637 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:16:08,638 INFO L229 MonitoredProcess]: Starting monitored process 70 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:16:08,639 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Waiting until timeout for monitored process [2021-11-02 23:16:09,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:16:09,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:16:09,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 51 conjunts are in the unsatisfiable core [2021-11-02 23:16:09,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:16:09,753 INFO L134 CoverageAnalysis]: Checked inductivity of 257 backedges. 0 proven. 237 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-02 23:16:09,753 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326816809] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:16:09,753 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:16:09,754 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 24] total 29 [2021-11-02 23:16:09,754 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114422155] [2021-11-02 23:16:09,754 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2021-11-02 23:16:09,754 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:16:09,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2021-11-02 23:16:09,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=753, Unknown=0, NotChecked=0, Total=812 [2021-11-02 23:16:09,755 INFO L87 Difference]: Start difference. First operand 634 states and 870 transitions. Second operand has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:11,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:16:11,692 INFO L93 Difference]: Finished difference Result 1204 states and 1665 transitions. [2021-11-02 23:16:11,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-11-02 23:16:11,692 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 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 43 [2021-11-02 23:16:11,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:16:11,695 INFO L225 Difference]: With dead ends: 1204 [2021-11-02 23:16:11,695 INFO L226 Difference]: Without dead ends: 1143 [2021-11-02 23:16:11,696 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 44 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=139, Invalid=1753, Unknown=0, NotChecked=0, Total=1892 [2021-11-02 23:16:11,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1143 states. [2021-11-02 23:16:11,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1143 to 807. [2021-11-02 23:16:11,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 807 states, 806 states have (on average 1.3101736972704714) internal successors, (1056), 806 states have internal predecessors, (1056), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:11,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 807 states to 807 states and 1056 transitions. [2021-11-02 23:16:11,740 INFO L78 Accepts]: Start accepts. Automaton has 807 states and 1056 transitions. Word has length 43 [2021-11-02 23:16:11,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:16:11,740 INFO L470 AbstractCegarLoop]: Abstraction has 807 states and 1056 transitions. [2021-11-02 23:16:11,740 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 1.5517241379310345) internal successors, (45), 29 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:11,740 INFO L276 IsEmpty]: Start isEmpty. Operand 807 states and 1056 transitions. [2021-11-02 23:16:11,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 45 [2021-11-02 23:16:11,741 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:16:11,741 INFO L513 BasicCegarLoop]: trace histogram [22, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:16:11,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (70)] Forceful destruction successful, exit code 0 [2021-11-02 23:16:11,942 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:16:11,942 INFO L402 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:16:11,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:16:11,942 INFO L85 PathProgramCache]: Analyzing trace with hash -535042679, now seen corresponding path program 45 times [2021-11-02 23:16:11,942 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:16:11,942 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524059569] [2021-11-02 23:16:11,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:16:11,943 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:16:11,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:16:12,522 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 0 proven. 263 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-02 23:16:12,523 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:16:12,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524059569] [2021-11-02 23:16:12,523 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524059569] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:16:12,523 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104050308] [2021-11-02 23:16:12,523 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:16:12,523 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:16:12,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:16:12,524 INFO L229 MonitoredProcess]: Starting monitored process 71 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:16:12,525 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Waiting until timeout for monitored process [2021-11-02 23:16:13,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-11-02 23:16:13,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:16:13,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 14 conjunts are in the unsatisfiable core [2021-11-02 23:16:13,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:16:13,715 INFO L134 CoverageAnalysis]: Checked inductivity of 279 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 264 trivial. 0 not checked. [2021-11-02 23:16:13,715 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104050308] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:16:13,715 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:16:13,715 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 6] total 34 [2021-11-02 23:16:13,715 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861077579] [2021-11-02 23:16:13,716 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-02 23:16:13,716 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:16:13,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-02 23:16:13,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=1036, Unknown=0, NotChecked=0, Total=1122 [2021-11-02 23:16:13,716 INFO L87 Difference]: Start difference. First operand 807 states and 1056 transitions. Second operand has 34 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 34 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:24,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:16:24,312 INFO L93 Difference]: Finished difference Result 1874 states and 2471 transitions. [2021-11-02 23:16:24,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 172 states. [2021-11-02 23:16:24,312 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 34 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 44 [2021-11-02 23:16:24,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:16:24,316 INFO L225 Difference]: With dead ends: 1874 [2021-11-02 23:16:24,316 INFO L226 Difference]: Without dead ends: 1810 [2021-11-02 23:16:24,318 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 236 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 177 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10409 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=1466, Invalid=30396, Unknown=0, NotChecked=0, Total=31862 [2021-11-02 23:16:24,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1810 states. [2021-11-02 23:16:24,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1810 to 862. [2021-11-02 23:16:24,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 1.3205574912891986) internal successors, (1137), 861 states have internal predecessors, (1137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:24,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1137 transitions. [2021-11-02 23:16:24,367 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1137 transitions. Word has length 44 [2021-11-02 23:16:24,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:16:24,367 INFO L470 AbstractCegarLoop]: Abstraction has 862 states and 1137 transitions. [2021-11-02 23:16:24,367 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.6176470588235294) internal successors, (55), 34 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:24,368 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1137 transitions. [2021-11-02 23:16:24,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-02 23:16:24,369 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:16:24,369 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:16:24,396 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (71)] Forceful destruction successful, exit code 0 [2021-11-02 23:16:24,569 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,71 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:16:24,569 INFO L402 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:16:24,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:16:24,570 INFO L85 PathProgramCache]: Analyzing trace with hash -999301714, now seen corresponding path program 46 times [2021-11-02 23:16:24,570 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:16:24,570 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369902176] [2021-11-02 23:16:24,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:16:24,570 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:16:24,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:16:24,915 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-11-02 23:16:24,916 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:16:24,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369902176] [2021-11-02 23:16:24,916 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369902176] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:16:24,916 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275804576] [2021-11-02 23:16:24,916 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:16:24,916 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:16:24,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:16:24,917 INFO L229 MonitoredProcess]: Starting monitored process 72 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:16:24,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Waiting until timeout for monitored process [2021-11-02 23:16:25,878 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:16:25,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:16:25,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-02 23:16:25,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:16:26,076 INFO L134 CoverageAnalysis]: Checked inductivity of 174 backedges. 0 proven. 87 refuted. 0 times theorem prover too weak. 87 trivial. 0 not checked. [2021-11-02 23:16:26,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275804576] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:16:26,076 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:16:26,076 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-11-02 23:16:26,076 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573813614] [2021-11-02 23:16:26,076 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-02 23:16:26,077 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:16:26,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-02 23:16:26,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=414, Unknown=0, NotChecked=0, Total=462 [2021-11-02 23:16:26,077 INFO L87 Difference]: Start difference. First operand 862 states and 1137 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:27,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:16:27,085 INFO L93 Difference]: Finished difference Result 1090 states and 1391 transitions. [2021-11-02 23:16:27,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-11-02 23:16:27,086 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 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 45 [2021-11-02 23:16:27,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:16:27,087 INFO L225 Difference]: With dead ends: 1090 [2021-11-02 23:16:27,087 INFO L226 Difference]: Without dead ends: 1059 [2021-11-02 23:16:27,088 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=158, Invalid=1734, Unknown=0, NotChecked=0, Total=1892 [2021-11-02 23:16:27,089 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1059 states. [2021-11-02 23:16:27,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1059 to 862. [2021-11-02 23:16:27,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 1.3193960511033682) internal successors, (1136), 861 states have internal predecessors, (1136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:27,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1136 transitions. [2021-11-02 23:16:27,133 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1136 transitions. Word has length 45 [2021-11-02 23:16:27,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:16:27,133 INFO L470 AbstractCegarLoop]: Abstraction has 862 states and 1136 transitions. [2021-11-02 23:16:27,133 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:27,133 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1136 transitions. [2021-11-02 23:16:27,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-02 23:16:27,135 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:16:27,135 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:16:27,178 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (72)] Forceful destruction successful, exit code 0 [2021-11-02 23:16:27,361 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2021-11-02 23:16:27,361 INFO L402 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:16:27,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:16:27,361 INFO L85 PathProgramCache]: Analyzing trace with hash -787490240, now seen corresponding path program 47 times [2021-11-02 23:16:27,362 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:16:27,362 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140259788] [2021-11-02 23:16:27,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:16:27,362 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:16:27,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:16:27,766 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-11-02 23:16:27,767 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:16:27,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140259788] [2021-11-02 23:16:27,767 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2140259788] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:16:27,767 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752793953] [2021-11-02 23:16:27,767 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:16:27,767 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:16:27,767 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:16:27,773 INFO L229 MonitoredProcess]: Starting monitored process 73 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:16:27,797 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Waiting until timeout for monitored process [2021-11-02 23:16:32,340 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-02 23:16:32,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:16:32,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 42 conjunts are in the unsatisfiable core [2021-11-02 23:16:32,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:16:32,532 INFO L134 CoverageAnalysis]: Checked inductivity of 186 backedges. 0 proven. 93 refuted. 0 times theorem prover too weak. 93 trivial. 0 not checked. [2021-11-02 23:16:32,532 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [752793953] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:16:32,532 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:16:32,532 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-11-02 23:16:32,532 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428327364] [2021-11-02 23:16:32,532 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-02 23:16:32,533 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:16:32,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-02 23:16:32,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=415, Unknown=0, NotChecked=0, Total=462 [2021-11-02 23:16:32,534 INFO L87 Difference]: Start difference. First operand 862 states and 1136 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:33,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:16:33,550 INFO L93 Difference]: Finished difference Result 1132 states and 1434 transitions. [2021-11-02 23:16:33,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-11-02 23:16:33,550 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 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 45 [2021-11-02 23:16:33,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:16:33,552 INFO L225 Difference]: With dead ends: 1132 [2021-11-02 23:16:33,552 INFO L226 Difference]: Without dead ends: 1102 [2021-11-02 23:16:33,552 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=147, Invalid=1575, Unknown=0, NotChecked=0, Total=1722 [2021-11-02 23:16:33,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1102 states. [2021-11-02 23:16:33,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1102 to 862. [2021-11-02 23:16:33,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 1.3182346109175378) internal successors, (1135), 861 states have internal predecessors, (1135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:33,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1135 transitions. [2021-11-02 23:16:33,599 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1135 transitions. Word has length 45 [2021-11-02 23:16:33,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:16:33,599 INFO L470 AbstractCegarLoop]: Abstraction has 862 states and 1135 transitions. [2021-11-02 23:16:33,599 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:33,599 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1135 transitions. [2021-11-02 23:16:33,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2021-11-02 23:16:33,600 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:16:33,600 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:16:33,610 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (73)] Forceful destruction successful, exit code 0 [2021-11-02 23:16:33,800 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,73 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:16:33,801 INFO L402 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:16:33,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:16:33,801 INFO L85 PathProgramCache]: Analyzing trace with hash 1159005038, now seen corresponding path program 48 times [2021-11-02 23:16:33,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:16:33,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1263970605] [2021-11-02 23:16:33,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:16:33,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:16:33,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:16:34,130 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-02 23:16:34,130 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:16:34,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1263970605] [2021-11-02 23:16:34,130 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1263970605] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:16:34,130 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1516371757] [2021-11-02 23:16:34,130 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:16:34,130 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:16:34,130 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:16:34,131 INFO L229 MonitoredProcess]: Starting monitored process 74 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:16:34,132 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Waiting until timeout for monitored process [2021-11-02 23:16:35,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-11-02 23:16:35,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:16:35,722 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 39 conjunts are in the unsatisfiable core [2021-11-02 23:16:35,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:16:35,924 INFO L134 CoverageAnalysis]: Checked inductivity of 202 backedges. 0 proven. 101 refuted. 0 times theorem prover too weak. 101 trivial. 0 not checked. [2021-11-02 23:16:35,924 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1516371757] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:16:35,924 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:16:35,924 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2021-11-02 23:16:35,924 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591965775] [2021-11-02 23:16:35,925 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2021-11-02 23:16:35,925 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:16:35,925 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2021-11-02 23:16:35,925 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=416, Unknown=0, NotChecked=0, Total=462 [2021-11-02 23:16:35,925 INFO L87 Difference]: Start difference. First operand 862 states and 1135 transitions. Second operand has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:37,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:16:37,087 INFO L93 Difference]: Finished difference Result 1175 states and 1478 transitions. [2021-11-02 23:16:37,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-11-02 23:16:37,087 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 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 45 [2021-11-02 23:16:37,087 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:16:37,089 INFO L225 Difference]: With dead ends: 1175 [2021-11-02 23:16:37,089 INFO L226 Difference]: Without dead ends: 1146 [2021-11-02 23:16:37,089 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 45 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=121, Invalid=1211, Unknown=0, NotChecked=0, Total=1332 [2021-11-02 23:16:37,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1146 states. [2021-11-02 23:16:37,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1146 to 862. [2021-11-02 23:16:37,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 862 states, 861 states have (on average 1.3170731707317074) internal successors, (1134), 861 states have internal predecessors, (1134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:37,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 862 states to 862 states and 1134 transitions. [2021-11-02 23:16:37,141 INFO L78 Accepts]: Start accepts. Automaton has 862 states and 1134 transitions. Word has length 45 [2021-11-02 23:16:37,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:16:37,141 INFO L470 AbstractCegarLoop]: Abstraction has 862 states and 1134 transitions. [2021-11-02 23:16:37,141 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 1.4545454545454546) internal successors, (32), 22 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:37,141 INFO L276 IsEmpty]: Start isEmpty. Operand 862 states and 1134 transitions. [2021-11-02 23:16:37,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-02 23:16:37,142 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:16:37,142 INFO L513 BasicCegarLoop]: trace histogram [14, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:16:37,149 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (74)] Forceful destruction successful, exit code 0 [2021-11-02 23:16:37,343 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 74 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2021-11-02 23:16:37,343 INFO L402 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:16:37,343 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:16:37,343 INFO L85 PathProgramCache]: Analyzing trace with hash 376274153, now seen corresponding path program 11 times [2021-11-02 23:16:37,344 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:16:37,344 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135884915] [2021-11-02 23:16:37,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:16:37,344 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:16:37,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:16:37,757 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 44 proven. 110 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-02 23:16:37,757 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:16:37,757 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135884915] [2021-11-02 23:16:37,758 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135884915] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:16:37,758 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2079342490] [2021-11-02 23:16:37,758 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:16:37,758 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:16:37,758 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:16:37,759 INFO L229 MonitoredProcess]: Starting monitored process 75 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:16:37,759 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Waiting until timeout for monitored process [2021-11-02 23:16:44,770 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2021-11-02 23:16:44,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:16:44,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 66 conjunts are in the unsatisfiable core [2021-11-02 23:16:44,777 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:16:45,289 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 44 proven. 110 refuted. 0 times theorem prover too weak. 62 trivial. 0 not checked. [2021-11-02 23:16:45,289 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2079342490] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:16:45,289 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:16:45,289 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 35 [2021-11-02 23:16:45,289 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32391363] [2021-11-02 23:16:45,290 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2021-11-02 23:16:45,290 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:16:45,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2021-11-02 23:16:45,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=1101, Unknown=0, NotChecked=0, Total=1190 [2021-11-02 23:16:45,290 INFO L87 Difference]: Start difference. First operand 862 states and 1134 transitions. Second operand has 35 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 35 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:48,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:16:48,411 INFO L93 Difference]: Finished difference Result 1210 states and 1697 transitions. [2021-11-02 23:16:48,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 129 states. [2021-11-02 23:16:48,412 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 35 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-02 23:16:48,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:16:48,413 INFO L225 Difference]: With dead ends: 1210 [2021-11-02 23:16:48,413 INFO L226 Difference]: Without dead ends: 1091 [2021-11-02 23:16:48,415 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 163 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5460 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=465, Invalid=16047, Unknown=0, NotChecked=0, Total=16512 [2021-11-02 23:16:48,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1091 states. [2021-11-02 23:16:48,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1091 to 880. [2021-11-02 23:16:48,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 880 states, 879 states have (on average 1.3071672354948805) internal successors, (1149), 879 states have internal predecessors, (1149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:48,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 880 states to 880 states and 1149 transitions. [2021-11-02 23:16:48,461 INFO L78 Accepts]: Start accepts. Automaton has 880 states and 1149 transitions. Word has length 46 [2021-11-02 23:16:48,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:16:48,462 INFO L470 AbstractCegarLoop]: Abstraction has 880 states and 1149 transitions. [2021-11-02 23:16:48,462 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 1.3428571428571427) internal successors, (47), 35 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:48,462 INFO L276 IsEmpty]: Start isEmpty. Operand 880 states and 1149 transitions. [2021-11-02 23:16:48,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2021-11-02 23:16:48,464 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:16:48,464 INFO L513 BasicCegarLoop]: trace histogram [23, 4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:16:48,477 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (75)] Forceful destruction successful, exit code 0 [2021-11-02 23:16:48,672 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-11-02 23:16:48,673 INFO L402 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:16:48,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:16:48,673 INFO L85 PathProgramCache]: Analyzing trace with hash 464148923, now seen corresponding path program 10 times [2021-11-02 23:16:48,673 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:16:48,674 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1588046782] [2021-11-02 23:16:48,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:16:48,674 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:16:48,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:16:49,241 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-02 23:16:49,241 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:16:49,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1588046782] [2021-11-02 23:16:49,241 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1588046782] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:16:49,241 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1687295098] [2021-11-02 23:16:49,242 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:16:49,242 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:16:49,242 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:16:49,242 INFO L229 MonitoredProcess]: Starting monitored process 76 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:16:49,243 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Waiting until timeout for monitored process [2021-11-02 23:16:50,170 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:16:50,170 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:16:50,172 INFO L263 TraceCheckSpWp]: Trace formula consists of 226 conjuncts, 59 conjunts are in the unsatisfiable core [2021-11-02 23:16:50,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:16:50,414 INFO L134 CoverageAnalysis]: Checked inductivity of 302 backedges. 0 proven. 286 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2021-11-02 23:16:50,415 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1687295098] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:16:50,415 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:16:50,415 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31] total 32 [2021-11-02 23:16:50,415 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203965586] [2021-11-02 23:16:50,415 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 32 states [2021-11-02 23:16:50,415 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:16:50,415 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 32 interpolants. [2021-11-02 23:16:50,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=926, Unknown=0, NotChecked=0, Total=992 [2021-11-02 23:16:50,416 INFO L87 Difference]: Start difference. First operand 880 states and 1149 transitions. Second operand has 32 states, 32 states have (on average 1.34375) internal successors, (43), 32 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:52,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:16:52,500 INFO L93 Difference]: Finished difference Result 1559 states and 2093 transitions. [2021-11-02 23:16:52,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-11-02 23:16:52,501 INFO L78 Accepts]: Start accepts. Automaton has has 32 states, 32 states have (on average 1.34375) internal successors, (43), 32 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 46 [2021-11-02 23:16:52,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:16:52,503 INFO L225 Difference]: With dead ends: 1559 [2021-11-02 23:16:52,503 INFO L226 Difference]: Without dead ends: 1475 [2021-11-02 23:16:52,503 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 92 GetRequests, 46 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=141, Invalid=2021, Unknown=0, NotChecked=0, Total=2162 [2021-11-02 23:16:52,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1475 states. [2021-11-02 23:16:52,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1475 to 907. [2021-11-02 23:16:52,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 906 states have (on average 1.3123620309050772) internal successors, (1189), 906 states have internal predecessors, (1189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:52,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 1189 transitions. [2021-11-02 23:16:52,548 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 1189 transitions. Word has length 46 [2021-11-02 23:16:52,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:16:52,548 INFO L470 AbstractCegarLoop]: Abstraction has 907 states and 1189 transitions. [2021-11-02 23:16:52,548 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 32 states, 32 states have (on average 1.34375) internal successors, (43), 32 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:52,548 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 1189 transitions. [2021-11-02 23:16:52,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-02 23:16:52,549 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:16:52,550 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:16:52,576 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (76)] Ended with exit code 0 [2021-11-02 23:16:52,750 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,76 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:16:52,750 INFO L402 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:16:52,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:16:52,751 INFO L85 PathProgramCache]: Analyzing trace with hash -1245754032, now seen corresponding path program 49 times [2021-11-02 23:16:52,751 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:16:52,751 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [701176766] [2021-11-02 23:16:52,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:16:52,751 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:16:52,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:16:53,089 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-02 23:16:53,089 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:16:53,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [701176766] [2021-11-02 23:16:53,089 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [701176766] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:16:53,089 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707558798] [2021-11-02 23:16:53,089 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:16:53,090 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:16:53,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:16:53,091 INFO L229 MonitoredProcess]: Starting monitored process 77 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:16:53,092 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Waiting until timeout for monitored process [2021-11-02 23:16:54,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:16:54,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-02 23:16:54,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:16:54,306 INFO L134 CoverageAnalysis]: Checked inductivity of 188 backedges. 0 proven. 94 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-02 23:16:54,306 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [707558798] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:16:54,306 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:16:54,306 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-11-02 23:16:54,306 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756781716] [2021-11-02 23:16:54,307 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-02 23:16:54,307 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:16:54,307 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-02 23:16:54,307 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=455, Unknown=0, NotChecked=0, Total=506 [2021-11-02 23:16:54,307 INFO L87 Difference]: Start difference. First operand 907 states and 1189 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:55,441 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:16:55,442 INFO L93 Difference]: Finished difference Result 1129 states and 1439 transitions. [2021-11-02 23:16:55,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-02 23:16:55,442 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-02 23:16:55,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:16:55,443 INFO L225 Difference]: With dead ends: 1129 [2021-11-02 23:16:55,443 INFO L226 Difference]: Without dead ends: 1096 [2021-11-02 23:16:55,444 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 326 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=181, Invalid=2171, Unknown=0, NotChecked=0, Total=2352 [2021-11-02 23:16:55,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1096 states. [2021-11-02 23:16:55,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1096 to 907. [2021-11-02 23:16:55,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 906 states have (on average 1.3112582781456954) internal successors, (1188), 906 states have internal predecessors, (1188), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:55,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 1188 transitions. [2021-11-02 23:16:55,480 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 1188 transitions. Word has length 47 [2021-11-02 23:16:55,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:16:55,480 INFO L470 AbstractCegarLoop]: Abstraction has 907 states and 1188 transitions. [2021-11-02 23:16:55,480 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:55,480 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 1188 transitions. [2021-11-02 23:16:55,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-02 23:16:55,482 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:16:55,482 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:16:55,504 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (77)] Ended with exit code 0 [2021-11-02 23:16:55,682 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:16:55,682 INFO L402 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:16:55,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:16:55,683 INFO L85 PathProgramCache]: Analyzing trace with hash -331426336, now seen corresponding path program 50 times [2021-11-02 23:16:55,683 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:16:55,683 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468697357] [2021-11-02 23:16:55,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:16:55,683 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:16:55,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:16:56,021 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-02 23:16:56,021 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:16:56,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468697357] [2021-11-02 23:16:56,021 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468697357] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:16:56,021 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792683565] [2021-11-02 23:16:56,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:16:56,021 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:16:56,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:16:56,022 INFO L229 MonitoredProcess]: Starting monitored process 78 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:16:56,023 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Waiting until timeout for monitored process [2021-11-02 23:16:56,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:16:56,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:16:56,971 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 41 conjunts are in the unsatisfiable core [2021-11-02 23:16:56,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:16:57,172 INFO L134 CoverageAnalysis]: Checked inductivity of 198 backedges. 0 proven. 99 refuted. 0 times theorem prover too weak. 99 trivial. 0 not checked. [2021-11-02 23:16:57,172 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792683565] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:16:57,172 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:16:57,172 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2021-11-02 23:16:57,172 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419254886] [2021-11-02 23:16:57,172 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2021-11-02 23:16:57,172 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:16:57,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2021-11-02 23:16:57,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=456, Unknown=0, NotChecked=0, Total=506 [2021-11-02 23:16:57,173 INFO L87 Difference]: Start difference. First operand 907 states and 1188 transitions. Second operand has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:58,286 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:16:58,286 INFO L93 Difference]: Finished difference Result 1173 states and 1485 transitions. [2021-11-02 23:16:58,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-11-02 23:16:58,287 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-02 23:16:58,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:16:58,288 INFO L225 Difference]: With dead ends: 1173 [2021-11-02 23:16:58,288 INFO L226 Difference]: Without dead ends: 1141 [2021-11-02 23:16:58,288 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=175, Invalid=2081, Unknown=0, NotChecked=0, Total=2256 [2021-11-02 23:16:58,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1141 states. [2021-11-02 23:16:58,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1141 to 907. [2021-11-02 23:16:58,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 907 states, 906 states have (on average 1.3101545253863134) internal successors, (1187), 906 states have internal predecessors, (1187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:58,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 907 states to 907 states and 1187 transitions. [2021-11-02 23:16:58,325 INFO L78 Accepts]: Start accepts. Automaton has 907 states and 1187 transitions. Word has length 47 [2021-11-02 23:16:58,325 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:16:58,325 INFO L470 AbstractCegarLoop]: Abstraction has 907 states and 1187 transitions. [2021-11-02 23:16:58,325 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.434782608695652) internal successors, (33), 23 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:16:58,325 INFO L276 IsEmpty]: Start isEmpty. Operand 907 states and 1187 transitions. [2021-11-02 23:16:58,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-02 23:16:58,326 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:16:58,326 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:16:58,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (78)] Forceful destruction successful, exit code 0 [2021-11-02 23:16:58,526 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:16:58,527 INFO L402 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:16:58,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:16:58,528 INFO L85 PathProgramCache]: Analyzing trace with hash 2053372752, now seen corresponding path program 51 times [2021-11-02 23:16:58,528 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:16:58,528 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910931384] [2021-11-02 23:16:58,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:16:58,528 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:16:58,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:16:58,852 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-11-02 23:16:58,852 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:16:58,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910931384] [2021-11-02 23:16:58,852 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910931384] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:16:58,852 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326796373] [2021-11-02 23:16:58,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:16:58,852 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:16:58,852 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:16:58,853 INFO L229 MonitoredProcess]: Starting monitored process 79 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:16:58,854 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Waiting until timeout for monitored process [2021-11-02 23:17:00,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2021-11-02 23:17:00,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:17:00,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 26 conjunts are in the unsatisfiable core [2021-11-02 23:17:00,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:17:00,977 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 48 proven. 30 refuted. 0 times theorem prover too weak. 134 trivial. 0 not checked. [2021-11-02 23:17:00,978 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [326796373] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:00,978 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:17:00,978 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 14] total 34 [2021-11-02 23:17:00,978 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537894902] [2021-11-02 23:17:00,978 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2021-11-02 23:17:00,978 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:17:00,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2021-11-02 23:17:00,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=1046, Unknown=0, NotChecked=0, Total=1122 [2021-11-02 23:17:00,979 INFO L87 Difference]: Start difference. First operand 907 states and 1187 transitions. Second operand has 34 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 34 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:03,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:17:03,460 INFO L93 Difference]: Finished difference Result 1392 states and 1728 transitions. [2021-11-02 23:17:03,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2021-11-02 23:17:03,461 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 34 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-02 23:17:03,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:17:03,462 INFO L225 Difference]: With dead ends: 1392 [2021-11-02 23:17:03,462 INFO L226 Difference]: Without dead ends: 1209 [2021-11-02 23:17:03,463 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=280, Invalid=5420, Unknown=0, NotChecked=0, Total=5700 [2021-11-02 23:17:03,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1209 states. [2021-11-02 23:17:03,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1209 to 831. [2021-11-02 23:17:03,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 831 states, 830 states have (on average 1.310843373493976) internal successors, (1088), 830 states have internal predecessors, (1088), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:03,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 831 states to 831 states and 1088 transitions. [2021-11-02 23:17:03,502 INFO L78 Accepts]: Start accepts. Automaton has 831 states and 1088 transitions. Word has length 47 [2021-11-02 23:17:03,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:17:03,502 INFO L470 AbstractCegarLoop]: Abstraction has 831 states and 1088 transitions. [2021-11-02 23:17:03,502 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 1.3823529411764706) internal successors, (47), 34 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:03,502 INFO L276 IsEmpty]: Start isEmpty. Operand 831 states and 1088 transitions. [2021-11-02 23:17:03,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2021-11-02 23:17:03,503 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:17:03,503 INFO L513 BasicCegarLoop]: trace histogram [24, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:17:03,510 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (79)] Forceful destruction successful, exit code 0 [2021-11-02 23:17:03,705 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:03,705 INFO L402 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:17:03,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:17:03,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1521851168, now seen corresponding path program 52 times [2021-11-02 23:17:03,706 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:17:03,706 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431944603] [2021-11-02 23:17:03,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:17:03,706 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:17:03,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:04,321 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 310 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-02 23:17:04,321 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:17:04,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431944603] [2021-11-02 23:17:04,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431944603] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:04,321 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513781832] [2021-11-02 23:17:04,322 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:17:04,322 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:04,322 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:17:04,322 INFO L229 MonitoredProcess]: Starting monitored process 80 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:17:04,323 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Waiting until timeout for monitored process [2021-11-02 23:17:05,301 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:17:05,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:17:05,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 61 conjunts are in the unsatisfiable core [2021-11-02 23:17:05,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:17:05,520 INFO L134 CoverageAnalysis]: Checked inductivity of 330 backedges. 0 proven. 310 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-02 23:17:05,521 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513781832] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:05,521 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:17:05,521 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32] total 33 [2021-11-02 23:17:05,521 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662558764] [2021-11-02 23:17:05,521 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-02 23:17:05,521 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:17:05,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-02 23:17:05,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=988, Unknown=0, NotChecked=0, Total=1056 [2021-11-02 23:17:05,522 INFO L87 Difference]: Start difference. First operand 831 states and 1088 transitions. Second operand has 33 states, 33 states have (on average 1.303030303030303) internal successors, (43), 33 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:07,682 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:17:07,682 INFO L93 Difference]: Finished difference Result 1511 states and 2017 transitions. [2021-11-02 23:17:07,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-11-02 23:17:07,683 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.303030303030303) internal successors, (43), 33 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2021-11-02 23:17:07,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:17:07,684 INFO L225 Difference]: With dead ends: 1511 [2021-11-02 23:17:07,684 INFO L226 Difference]: Without dead ends: 1422 [2021-11-02 23:17:07,685 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 47 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=143, Invalid=2113, Unknown=0, NotChecked=0, Total=2256 [2021-11-02 23:17:07,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1422 states. [2021-11-02 23:17:07,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1422 to 856. [2021-11-02 23:17:07,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 1.3157894736842106) internal successors, (1125), 855 states have internal predecessors, (1125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:07,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 1125 transitions. [2021-11-02 23:17:07,744 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 1125 transitions. Word has length 47 [2021-11-02 23:17:07,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:17:07,744 INFO L470 AbstractCegarLoop]: Abstraction has 856 states and 1125 transitions. [2021-11-02 23:17:07,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.303030303030303) internal successors, (43), 33 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:07,745 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 1125 transitions. [2021-11-02 23:17:07,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-02 23:17:07,745 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:17:07,746 INFO L513 BasicCegarLoop]: trace histogram [11, 11, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:17:07,769 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (80)] Forceful destruction successful, exit code 0 [2021-11-02 23:17:07,946 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,80 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:07,946 INFO L402 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:17:07,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:17:07,947 INFO L85 PathProgramCache]: Analyzing trace with hash -112639540, now seen corresponding path program 53 times [2021-11-02 23:17:07,947 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:17:07,947 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534040842] [2021-11-02 23:17:07,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:17:07,947 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:17:07,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:08,293 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-02 23:17:08,293 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:17:08,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534040842] [2021-11-02 23:17:08,293 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534040842] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:08,293 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1229873221] [2021-11-02 23:17:08,294 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:17:08,294 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:08,294 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:17:08,294 INFO L229 MonitoredProcess]: Starting monitored process 81 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:17:08,295 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Waiting until timeout for monitored process [2021-11-02 23:17:16,736 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2021-11-02 23:17:16,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:17:16,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 48 conjunts are in the unsatisfiable core [2021-11-02 23:17:16,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:17:16,911 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 102 refuted. 0 times theorem prover too weak. 94 trivial. 0 not checked. [2021-11-02 23:17:16,912 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1229873221] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:16,912 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:17:16,912 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-11-02 23:17:16,912 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130732877] [2021-11-02 23:17:16,912 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-02 23:17:16,912 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:17:16,912 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-02 23:17:16,913 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=498, Unknown=0, NotChecked=0, Total=552 [2021-11-02 23:17:16,913 INFO L87 Difference]: Start difference. First operand 856 states and 1125 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:17,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:17:17,992 INFO L93 Difference]: Finished difference Result 1105 states and 1430 transitions. [2021-11-02 23:17:17,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-02 23:17:17,992 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-02 23:17:17,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:17:17,994 INFO L225 Difference]: With dead ends: 1105 [2021-11-02 23:17:17,994 INFO L226 Difference]: Without dead ends: 1045 [2021-11-02 23:17:17,994 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=204, Invalid=2658, Unknown=0, NotChecked=0, Total=2862 [2021-11-02 23:17:17,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1045 states. [2021-11-02 23:17:18,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1045 to 856. [2021-11-02 23:17:18,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 856 states, 855 states have (on average 1.3146198830409357) internal successors, (1124), 855 states have internal predecessors, (1124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:18,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 856 states to 856 states and 1124 transitions. [2021-11-02 23:17:18,032 INFO L78 Accepts]: Start accepts. Automaton has 856 states and 1124 transitions. Word has length 48 [2021-11-02 23:17:18,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:17:18,032 INFO L470 AbstractCegarLoop]: Abstraction has 856 states and 1124 transitions. [2021-11-02 23:17:18,032 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:18,032 INFO L276 IsEmpty]: Start isEmpty. Operand 856 states and 1124 transitions. [2021-11-02 23:17:18,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-02 23:17:18,033 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:17:18,034 INFO L513 BasicCegarLoop]: trace histogram [14, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:17:18,041 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (81)] Forceful destruction successful, exit code 0 [2021-11-02 23:17:18,234 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2021-11-02 23:17:18,234 INFO L402 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:17:18,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:17:18,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1626445531, now seen corresponding path program 12 times [2021-11-02 23:17:18,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:17:18,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1801500208] [2021-11-02 23:17:18,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:17:18,235 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:17:18,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:18,632 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 36 proven. 132 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-02 23:17:18,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:17:18,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1801500208] [2021-11-02 23:17:18,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1801500208] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:18,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [492031629] [2021-11-02 23:17:18,633 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:17:18,633 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:18,633 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:17:18,634 INFO L229 MonitoredProcess]: Starting monitored process 82 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:17:18,634 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Waiting until timeout for monitored process [2021-11-02 23:17:20,112 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-11-02 23:17:20,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:17:20,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 236 conjuncts, 72 conjunts are in the unsatisfiable core [2021-11-02 23:17:20,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:17:20,710 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 36 proven. 132 refuted. 0 times theorem prover too weak. 70 trivial. 0 not checked. [2021-11-02 23:17:20,710 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [492031629] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:20,710 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:17:20,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 38 [2021-11-02 23:17:20,711 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911381073] [2021-11-02 23:17:20,711 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2021-11-02 23:17:20,711 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:17:20,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2021-11-02 23:17:20,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1309, Unknown=0, NotChecked=0, Total=1406 [2021-11-02 23:17:20,712 INFO L87 Difference]: Start difference. First operand 856 states and 1124 transitions. Second operand has 38 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 38 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:25,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:17:25,124 INFO L93 Difference]: Finished difference Result 1248 states and 1743 transitions. [2021-11-02 23:17:25,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 160 states. [2021-11-02 23:17:25,124 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 38 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-02 23:17:25,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:17:25,125 INFO L225 Difference]: With dead ends: 1248 [2021-11-02 23:17:25,126 INFO L226 Difference]: Without dead ends: 1125 [2021-11-02 23:17:25,128 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 195 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 158 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8911 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=585, Invalid=24855, Unknown=0, NotChecked=0, Total=25440 [2021-11-02 23:17:25,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1125 states. [2021-11-02 23:17:25,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1125 to 877. [2021-11-02 23:17:25,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 877 states, 876 states have (on average 1.3036529680365296) internal successors, (1142), 876 states have internal predecessors, (1142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:25,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 877 states to 877 states and 1142 transitions. [2021-11-02 23:17:25,189 INFO L78 Accepts]: Start accepts. Automaton has 877 states and 1142 transitions. Word has length 48 [2021-11-02 23:17:25,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:17:25,190 INFO L470 AbstractCegarLoop]: Abstraction has 877 states and 1142 transitions. [2021-11-02 23:17:25,190 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 38 states have (on average 1.3157894736842106) internal successors, (50), 38 states have internal predecessors, (50), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:25,190 INFO L276 IsEmpty]: Start isEmpty. Operand 877 states and 1142 transitions. [2021-11-02 23:17:25,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 49 [2021-11-02 23:17:25,191 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:17:25,192 INFO L513 BasicCegarLoop]: trace histogram [25, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:17:25,201 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (82)] Forceful destruction successful, exit code 0 [2021-11-02 23:17:25,400 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:25,400 INFO L402 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:17:25,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:17:25,400 INFO L85 PathProgramCache]: Analyzing trace with hash -1868768677, now seen corresponding path program 54 times [2021-11-02 23:17:25,400 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:17:25,400 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632974398] [2021-11-02 23:17:25,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:17:25,401 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:17:25,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:25,946 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 335 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2021-11-02 23:17:25,946 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:17:25,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632974398] [2021-11-02 23:17:25,947 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [632974398] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:25,947 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449666301] [2021-11-02 23:17:25,947 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:17:25,948 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:25,948 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:17:25,949 INFO L229 MonitoredProcess]: Starting monitored process 83 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:17:25,950 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Waiting until timeout for monitored process [2021-11-02 23:17:27,004 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-11-02 23:17:27,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:17:27,006 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 38 conjunts are in the unsatisfiable core [2021-11-02 23:17:27,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:17:27,459 INFO L134 CoverageAnalysis]: Checked inductivity of 355 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 325 trivial. 0 not checked. [2021-11-02 23:17:27,460 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449666301] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:27,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:17:27,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 13] total 44 [2021-11-02 23:17:27,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085077359] [2021-11-02 23:17:27,460 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-02 23:17:27,460 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:17:27,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-02 23:17:27,461 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1802, Unknown=0, NotChecked=0, Total=1892 [2021-11-02 23:17:27,461 INFO L87 Difference]: Start difference. First operand 877 states and 1142 transitions. Second operand has 44 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 44 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:33,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:17:33,804 INFO L93 Difference]: Finished difference Result 1635 states and 2176 transitions. [2021-11-02 23:17:33,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 132 states. [2021-11-02 23:17:33,804 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 44 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 48 [2021-11-02 23:17:33,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:17:33,811 INFO L225 Difference]: With dead ends: 1635 [2021-11-02 23:17:33,811 INFO L226 Difference]: Without dead ends: 1531 [2021-11-02 23:17:33,812 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 175 GetRequests, 39 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4382 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=494, Invalid=18412, Unknown=0, NotChecked=0, Total=18906 [2021-11-02 23:17:33,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1531 states. [2021-11-02 23:17:33,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1531 to 781. [2021-11-02 23:17:33,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 780 states have (on average 1.367948717948718) internal successors, (1067), 780 states have internal predecessors, (1067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:33,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 1067 transitions. [2021-11-02 23:17:33,880 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 1067 transitions. Word has length 48 [2021-11-02 23:17:33,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:17:33,880 INFO L470 AbstractCegarLoop]: Abstraction has 781 states and 1067 transitions. [2021-11-02 23:17:33,880 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.4545454545454546) internal successors, (64), 44 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:33,880 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 1067 transitions. [2021-11-02 23:17:33,882 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-02 23:17:33,882 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:17:33,882 INFO L513 BasicCegarLoop]: trace histogram [12, 12, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:17:33,923 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (83)] Forceful destruction successful, exit code 0 [2021-11-02 23:17:34,097 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,83 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:34,097 INFO L402 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:17:34,097 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:17:34,097 INFO L85 PathProgramCache]: Analyzing trace with hash 856370368, now seen corresponding path program 55 times [2021-11-02 23:17:34,097 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:17:34,098 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1380248716] [2021-11-02 23:17:34,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:17:34,098 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:17:34,122 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:34,409 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-11-02 23:17:34,409 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:17:34,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1380248716] [2021-11-02 23:17:34,409 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1380248716] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:34,409 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945862401] [2021-11-02 23:17:34,409 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:17:34,409 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:34,409 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:17:34,410 INFO L229 MonitoredProcess]: Starting monitored process 84 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:17:34,411 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Waiting until timeout for monitored process [2021-11-02 23:17:35,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:35,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-02 23:17:35,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:17:35,684 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 0 proven. 106 refuted. 0 times theorem prover too weak. 106 trivial. 0 not checked. [2021-11-02 23:17:35,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945862401] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:35,685 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:17:35,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-11-02 23:17:35,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98498095] [2021-11-02 23:17:35,685 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-02 23:17:35,685 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:17:35,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-02 23:17:35,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=499, Unknown=0, NotChecked=0, Total=552 [2021-11-02 23:17:35,686 INFO L87 Difference]: Start difference. First operand 781 states and 1067 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:36,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:17:36,822 INFO L93 Difference]: Finished difference Result 1041 states and 1360 transitions. [2021-11-02 23:17:36,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-11-02 23:17:36,823 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-02 23:17:36,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:17:36,824 INFO L225 Difference]: With dead ends: 1041 [2021-11-02 23:17:36,824 INFO L226 Difference]: Without dead ends: 1007 [2021-11-02 23:17:36,824 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=203, Invalid=2659, Unknown=0, NotChecked=0, Total=2862 [2021-11-02 23:17:36,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1007 states. [2021-11-02 23:17:36,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1007 to 781. [2021-11-02 23:17:36,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 780 states have (on average 1.3666666666666667) internal successors, (1066), 780 states have internal predecessors, (1066), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:36,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 1066 transitions. [2021-11-02 23:17:36,865 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 1066 transitions. Word has length 49 [2021-11-02 23:17:36,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:17:36,865 INFO L470 AbstractCegarLoop]: Abstraction has 781 states and 1066 transitions. [2021-11-02 23:17:36,865 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:36,865 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 1066 transitions. [2021-11-02 23:17:36,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2021-11-02 23:17:36,866 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:17:36,866 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:17:36,896 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (84)] Forceful destruction successful, exit code 0 [2021-11-02 23:17:37,081 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 84 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2021-11-02 23:17:37,081 INFO L402 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:17:37,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:17:37,081 INFO L85 PathProgramCache]: Analyzing trace with hash -1637278034, now seen corresponding path program 56 times [2021-11-02 23:17:37,081 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:17:37,081 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1691188414] [2021-11-02 23:17:37,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:17:37,082 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:17:37,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:37,397 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-02 23:17:37,397 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:17:37,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1691188414] [2021-11-02 23:17:37,398 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1691188414] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:37,398 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748061370] [2021-11-02 23:17:37,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:17:37,398 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:37,398 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:17:37,400 INFO L229 MonitoredProcess]: Starting monitored process 85 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:17:37,400 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Waiting until timeout for monitored process [2021-11-02 23:17:38,495 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:17:38,495 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:17:38,496 INFO L263 TraceCheckSpWp]: Trace formula consists of 241 conjuncts, 43 conjunts are in the unsatisfiable core [2021-11-02 23:17:38,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:17:38,674 INFO L134 CoverageAnalysis]: Checked inductivity of 224 backedges. 0 proven. 112 refuted. 0 times theorem prover too weak. 112 trivial. 0 not checked. [2021-11-02 23:17:38,674 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748061370] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:38,674 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:17:38,674 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23] total 24 [2021-11-02 23:17:38,675 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1522969057] [2021-11-02 23:17:38,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2021-11-02 23:17:38,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:17:38,676 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2021-11-02 23:17:38,676 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=500, Unknown=0, NotChecked=0, Total=552 [2021-11-02 23:17:38,676 INFO L87 Difference]: Start difference. First operand 781 states and 1066 transitions. Second operand has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:39,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:17:39,973 INFO L93 Difference]: Finished difference Result 1088 states and 1410 transitions. [2021-11-02 23:17:39,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-11-02 23:17:39,974 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 49 [2021-11-02 23:17:39,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:17:39,975 INFO L225 Difference]: With dead ends: 1088 [2021-11-02 23:17:39,976 INFO L226 Difference]: Without dead ends: 1055 [2021-11-02 23:17:39,976 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=187, Invalid=2363, Unknown=0, NotChecked=0, Total=2550 [2021-11-02 23:17:39,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1055 states. [2021-11-02 23:17:40,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1055 to 781. [2021-11-02 23:17:40,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 781 states, 780 states have (on average 1.3653846153846154) internal successors, (1065), 780 states have internal predecessors, (1065), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:40,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 781 states to 781 states and 1065 transitions. [2021-11-02 23:17:40,063 INFO L78 Accepts]: Start accepts. Automaton has 781 states and 1065 transitions. Word has length 49 [2021-11-02 23:17:40,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:17:40,063 INFO L470 AbstractCegarLoop]: Abstraction has 781 states and 1065 transitions. [2021-11-02 23:17:40,063 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 1.4166666666666667) internal successors, (34), 24 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:40,063 INFO L276 IsEmpty]: Start isEmpty. Operand 781 states and 1065 transitions. [2021-11-02 23:17:40,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-02 23:17:40,065 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:17:40,065 INFO L513 BasicCegarLoop]: trace histogram [8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:17:40,107 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (85)] Forceful destruction successful, exit code 0 [2021-11-02 23:17:40,281 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,85 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:40,281 INFO L402 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:17:40,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:17:40,281 INFO L85 PathProgramCache]: Analyzing trace with hash 945364890, now seen corresponding path program 11 times [2021-11-02 23:17:40,281 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:17:40,281 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794038950] [2021-11-02 23:17:40,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:17:40,282 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:17:40,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:40,507 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 8 proven. 64 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2021-11-02 23:17:40,507 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:17:40,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794038950] [2021-11-02 23:17:40,508 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794038950] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:40,508 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1878586] [2021-11-02 23:17:40,508 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:17:40,508 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:40,508 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:17:40,509 INFO L229 MonitoredProcess]: Starting monitored process 86 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:17:40,531 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Waiting until timeout for monitored process [2021-11-02 23:17:44,320 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-11-02 23:17:44,320 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:17:44,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 33 conjunts are in the unsatisfiable core [2021-11-02 23:17:44,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:17:44,592 INFO L134 CoverageAnalysis]: Checked inductivity of 172 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 108 trivial. 0 not checked. [2021-11-02 23:17:44,593 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1878586] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:44,593 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:17:44,593 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 20 [2021-11-02 23:17:44,593 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159963363] [2021-11-02 23:17:44,593 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-11-02 23:17:44,593 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:17:44,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-11-02 23:17:44,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2021-11-02 23:17:44,594 INFO L87 Difference]: Start difference. First operand 781 states and 1065 transitions. Second operand has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:49,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:17:49,019 INFO L93 Difference]: Finished difference Result 1240 states and 1689 transitions. [2021-11-02 23:17:49,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2021-11-02 23:17:49,019 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 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 50 [2021-11-02 23:17:49,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:17:49,021 INFO L225 Difference]: With dead ends: 1240 [2021-11-02 23:17:49,021 INFO L226 Difference]: Without dead ends: 1148 [2021-11-02 23:17:49,022 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 972 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=773, Invalid=2307, Unknown=0, NotChecked=0, Total=3080 [2021-11-02 23:17:49,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1148 states. [2021-11-02 23:17:49,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1148 to 943. [2021-11-02 23:17:49,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 943 states, 942 states have (on average 1.3927813163481952) internal successors, (1312), 942 states have internal predecessors, (1312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:49,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 943 states to 943 states and 1312 transitions. [2021-11-02 23:17:49,104 INFO L78 Accepts]: Start accepts. Automaton has 943 states and 1312 transitions. Word has length 50 [2021-11-02 23:17:49,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:17:49,105 INFO L470 AbstractCegarLoop]: Abstraction has 943 states and 1312 transitions. [2021-11-02 23:17:49,105 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.55) internal successors, (51), 20 states have internal predecessors, (51), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:49,105 INFO L276 IsEmpty]: Start isEmpty. Operand 943 states and 1312 transitions. [2021-11-02 23:17:49,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 51 [2021-11-02 23:17:49,106 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:17:49,107 INFO L513 BasicCegarLoop]: trace histogram [14, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:17:49,117 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (86)] Forceful destruction successful, exit code 0 [2021-11-02 23:17:49,316 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2021-11-02 23:17:49,316 INFO L402 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:17:49,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:17:49,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1977755543, now seen corresponding path program 13 times [2021-11-02 23:17:49,316 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:17:49,316 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110909780] [2021-11-02 23:17:49,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:17:49,317 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:17:49,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:49,818 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 26 proven. 156 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-02 23:17:49,819 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:17:49,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110909780] [2021-11-02 23:17:49,819 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2110909780] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:49,819 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1850827532] [2021-11-02 23:17:49,819 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:17:49,819 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:49,819 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:17:49,820 INFO L229 MonitoredProcess]: Starting monitored process 87 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:17:49,821 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Waiting until timeout for monitored process [2021-11-02 23:17:50,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:50,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 78 conjunts are in the unsatisfiable core [2021-11-02 23:17:50,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:17:51,535 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 26 proven. 156 refuted. 0 times theorem prover too weak. 80 trivial. 0 not checked. [2021-11-02 23:17:51,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1850827532] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:51,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:17:51,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 41 [2021-11-02 23:17:51,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081516193] [2021-11-02 23:17:51,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2021-11-02 23:17:51,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:17:51,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2021-11-02 23:17:51,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=1535, Unknown=0, NotChecked=0, Total=1640 [2021-11-02 23:17:51,536 INFO L87 Difference]: Start difference. First operand 943 states and 1312 transitions. Second operand has 41 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 41 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:56,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:17:56,408 INFO L93 Difference]: Finished difference Result 1490 states and 2180 transitions. [2021-11-02 23:17:56,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 182 states. [2021-11-02 23:17:56,408 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 41 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 50 [2021-11-02 23:17:56,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:17:56,410 INFO L225 Difference]: With dead ends: 1490 [2021-11-02 23:17:56,410 INFO L226 Difference]: Without dead ends: 1289 [2021-11-02 23:17:56,412 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 218 GetRequests, 37 SyntacticMatches, 1 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11781 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=669, Invalid=32273, Unknown=0, NotChecked=0, Total=32942 [2021-11-02 23:17:56,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1289 states. [2021-11-02 23:17:56,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1289 to 965. [2021-11-02 23:17:56,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 965 states, 964 states have (on average 1.3775933609958506) internal successors, (1328), 964 states have internal predecessors, (1328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:56,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 1328 transitions. [2021-11-02 23:17:56,465 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 1328 transitions. Word has length 50 [2021-11-02 23:17:56,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:17:56,465 INFO L470 AbstractCegarLoop]: Abstraction has 965 states and 1328 transitions. [2021-11-02 23:17:56,466 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 1.2926829268292683) internal successors, (53), 41 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:17:56,466 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 1328 transitions. [2021-11-02 23:17:56,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-02 23:17:56,467 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:17:56,467 INFO L513 BasicCegarLoop]: trace histogram [13, 13, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:17:56,495 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (87)] Forceful destruction successful, exit code 0 [2021-11-02 23:17:56,667 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:56,668 INFO L402 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:17:56,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:17:56,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1582184944, now seen corresponding path program 57 times [2021-11-02 23:17:56,668 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:17:56,668 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794306973] [2021-11-02 23:17:56,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:17:56,668 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:17:56,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:17:57,079 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2021-11-02 23:17:57,079 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:17:57,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794306973] [2021-11-02 23:17:57,079 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794306973] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:17:57,079 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2064751169] [2021-11-02 23:17:57,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:17:57,079 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:17:57,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:17:57,081 INFO L229 MonitoredProcess]: Starting monitored process 88 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:17:57,103 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Waiting until timeout for monitored process [2021-11-02 23:18:00,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-02 23:18:00,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:00,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-02 23:18:00,301 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:00,483 INFO L134 CoverageAnalysis]: Checked inductivity of 238 backedges. 0 proven. 119 refuted. 0 times theorem prover too weak. 119 trivial. 0 not checked. [2021-11-02 23:18:00,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2064751169] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:00,483 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:18:00,483 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-11-02 23:18:00,483 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186900104] [2021-11-02 23:18:00,483 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 23:18:00,483 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:00,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 23:18:00,484 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=545, Unknown=0, NotChecked=0, Total=600 [2021-11-02 23:18:00,484 INFO L87 Difference]: Start difference. First operand 965 states and 1328 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:01,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:01,787 INFO L93 Difference]: Finished difference Result 1309 states and 1719 transitions. [2021-11-02 23:18:01,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-02 23:18:01,787 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-02 23:18:01,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:01,790 INFO L225 Difference]: With dead ends: 1309 [2021-11-02 23:18:01,790 INFO L226 Difference]: Without dead ends: 1274 [2021-11-02 23:18:01,791 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 105 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=205, Invalid=2765, Unknown=0, NotChecked=0, Total=2970 [2021-11-02 23:18:01,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1274 states. [2021-11-02 23:18:01,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1274 to 965. [2021-11-02 23:18:01,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 965 states, 964 states have (on average 1.3765560165975104) internal successors, (1327), 964 states have internal predecessors, (1327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:01,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 1327 transitions. [2021-11-02 23:18:01,874 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 1327 transitions. Word has length 51 [2021-11-02 23:18:01,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:01,874 INFO L470 AbstractCegarLoop]: Abstraction has 965 states and 1327 transitions. [2021-11-02 23:18:01,874 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:01,874 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 1327 transitions. [2021-11-02 23:18:01,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2021-11-02 23:18:01,876 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:01,876 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:01,892 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (88)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:02,085 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:02,085 INFO L402 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:02,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:02,086 INFO L85 PathProgramCache]: Analyzing trace with hash 1946057312, now seen corresponding path program 58 times [2021-11-02 23:18:02,086 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:02,086 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1740442204] [2021-11-02 23:18:02,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:02,086 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:02,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:02,416 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-11-02 23:18:02,416 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:02,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1740442204] [2021-11-02 23:18:02,417 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1740442204] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:02,417 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605508355] [2021-11-02 23:18:02,417 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:18:02,417 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:02,417 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:02,430 INFO L229 MonitoredProcess]: Starting monitored process 89 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:02,430 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Waiting until timeout for monitored process [2021-11-02 23:18:03,638 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:18:03,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:03,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 45 conjunts are in the unsatisfiable core [2021-11-02 23:18:03,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:03,828 INFO L134 CoverageAnalysis]: Checked inductivity of 252 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-11-02 23:18:03,828 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605508355] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:03,829 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:18:03,829 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24] total 25 [2021-11-02 23:18:03,829 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560317320] [2021-11-02 23:18:03,829 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2021-11-02 23:18:03,829 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:03,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2021-11-02 23:18:03,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=546, Unknown=0, NotChecked=0, Total=600 [2021-11-02 23:18:03,829 INFO L87 Difference]: Start difference. First operand 965 states and 1327 transitions. Second operand has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:05,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:05,228 INFO L93 Difference]: Finished difference Result 1361 states and 1774 transitions. [2021-11-02 23:18:05,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2021-11-02 23:18:05,232 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 51 [2021-11-02 23:18:05,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:05,235 INFO L225 Difference]: With dead ends: 1361 [2021-11-02 23:18:05,236 INFO L226 Difference]: Without dead ends: 1327 [2021-11-02 23:18:05,236 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 51 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=189, Invalid=2463, Unknown=0, NotChecked=0, Total=2652 [2021-11-02 23:18:05,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1327 states. [2021-11-02 23:18:05,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1327 to 965. [2021-11-02 23:18:05,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 965 states, 964 states have (on average 1.3755186721991701) internal successors, (1326), 964 states have internal predecessors, (1326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:05,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 965 states to 965 states and 1326 transitions. [2021-11-02 23:18:05,317 INFO L78 Accepts]: Start accepts. Automaton has 965 states and 1326 transitions. Word has length 51 [2021-11-02 23:18:05,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:05,317 INFO L470 AbstractCegarLoop]: Abstraction has 965 states and 1326 transitions. [2021-11-02 23:18:05,317 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 1.4) internal successors, (35), 25 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:05,317 INFO L276 IsEmpty]: Start isEmpty. Operand 965 states and 1326 transitions. [2021-11-02 23:18:05,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-02 23:18:05,319 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:05,319 INFO L513 BasicCegarLoop]: trace histogram [14, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:05,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (89)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:05,545 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:05,545 INFO L402 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:05,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:05,545 INFO L85 PathProgramCache]: Analyzing trace with hash -1831561765, now seen corresponding path program 14 times [2021-11-02 23:18:05,545 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:05,545 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2012973953] [2021-11-02 23:18:05,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:05,546 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:05,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:06,043 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-02 23:18:06,043 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:06,043 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2012973953] [2021-11-02 23:18:06,044 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2012973953] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:06,044 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831033101] [2021-11-02 23:18:06,044 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:18:06,044 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:06,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:06,044 INFO L229 MonitoredProcess]: Starting monitored process 90 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:06,046 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Waiting until timeout for monitored process [2021-11-02 23:18:07,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:18:07,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:07,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 84 conjunts are in the unsatisfiable core [2021-11-02 23:18:07,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:07,959 INFO L134 CoverageAnalysis]: Checked inductivity of 288 backedges. 14 proven. 182 refuted. 0 times theorem prover too weak. 92 trivial. 0 not checked. [2021-11-02 23:18:07,959 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831033101] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:07,959 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:18:07,959 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30] total 44 [2021-11-02 23:18:07,959 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896295024] [2021-11-02 23:18:07,959 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2021-11-02 23:18:07,959 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:07,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2021-11-02 23:18:07,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=1779, Unknown=0, NotChecked=0, Total=1892 [2021-11-02 23:18:07,960 INFO L87 Difference]: Start difference. First operand 965 states and 1326 transitions. Second operand has 44 states, 44 states have (on average 1.25) internal successors, (55), 44 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:14,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:14,577 INFO L93 Difference]: Finished difference Result 1567 states and 2265 transitions. [2021-11-02 23:18:14,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 216 states. [2021-11-02 23:18:14,577 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 1.25) internal successors, (55), 44 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-02 23:18:14,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:14,578 INFO L225 Difference]: With dead ends: 1567 [2021-11-02 23:18:14,578 INFO L226 Difference]: Without dead ends: 1359 [2021-11-02 23:18:14,581 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 253 GetRequests, 38 SyntacticMatches, 1 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17205 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=801, Invalid=45639, Unknown=0, NotChecked=0, Total=46440 [2021-11-02 23:18:14,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2021-11-02 23:18:14,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 990. [2021-11-02 23:18:14,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 990 states, 989 states have (on average 1.3609706774519716) internal successors, (1346), 989 states have internal predecessors, (1346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:14,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 990 states to 990 states and 1346 transitions. [2021-11-02 23:18:14,631 INFO L78 Accepts]: Start accepts. Automaton has 990 states and 1346 transitions. Word has length 52 [2021-11-02 23:18:14,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:14,631 INFO L470 AbstractCegarLoop]: Abstraction has 990 states and 1346 transitions. [2021-11-02 23:18:14,631 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 1.25) internal successors, (55), 44 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:14,631 INFO L276 IsEmpty]: Start isEmpty. Operand 990 states and 1346 transitions. [2021-11-02 23:18:14,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 53 [2021-11-02 23:18:14,632 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:14,633 INFO L513 BasicCegarLoop]: trace histogram [26, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:14,656 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (90)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:14,833 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,90 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:14,833 INFO L402 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:14,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:14,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1691579339, now seen corresponding path program 59 times [2021-11-02 23:18:14,834 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:14,834 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974111164] [2021-11-02 23:18:14,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:14,834 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:14,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:15,465 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 366 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-02 23:18:15,465 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:15,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974111164] [2021-11-02 23:18:15,465 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [974111164] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:15,465 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004023439] [2021-11-02 23:18:15,465 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:18:15,465 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:15,465 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:15,466 INFO L229 MonitoredProcess]: Starting monitored process 91 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:15,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Waiting until timeout for monitored process [2021-11-02 23:18:30,732 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 14 check-sat command(s) [2021-11-02 23:18:30,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:30,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 77 conjunts are in the unsatisfiable core [2021-11-02 23:18:30,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:31,011 INFO L134 CoverageAnalysis]: Checked inductivity of 396 backedges. 0 proven. 381 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-02 23:18:31,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004023439] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:31,011 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:18:31,011 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 35] total 36 [2021-11-02 23:18:31,012 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050757326] [2021-11-02 23:18:31,012 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2021-11-02 23:18:31,012 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:31,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2021-11-02 23:18:31,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=1185, Unknown=0, NotChecked=0, Total=1260 [2021-11-02 23:18:31,012 INFO L87 Difference]: Start difference. First operand 990 states and 1346 transitions. Second operand has 36 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 36 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:33,648 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:33,648 INFO L93 Difference]: Finished difference Result 1956 states and 2736 transitions. [2021-11-02 23:18:33,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-02 23:18:33,649 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 36 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 52 [2021-11-02 23:18:33,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:33,650 INFO L225 Difference]: With dead ends: 1956 [2021-11-02 23:18:33,650 INFO L226 Difference]: Without dead ends: 1824 [2021-11-02 23:18:33,651 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 52 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=180, Invalid=3012, Unknown=0, NotChecked=0, Total=3192 [2021-11-02 23:18:33,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1824 states. [2021-11-02 23:18:33,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1824 to 1254. [2021-11-02 23:18:33,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1254 states, 1253 states have (on average 1.2960893854748603) internal successors, (1624), 1253 states have internal predecessors, (1624), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:33,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 1624 transitions. [2021-11-02 23:18:33,706 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 1624 transitions. Word has length 52 [2021-11-02 23:18:33,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:33,707 INFO L470 AbstractCegarLoop]: Abstraction has 1254 states and 1624 transitions. [2021-11-02 23:18:33,707 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 36 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:33,707 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 1624 transitions. [2021-11-02 23:18:33,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-02 23:18:33,708 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:33,708 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:33,719 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (91)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:33,908 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:33,909 INFO L402 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:33,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:33,909 INFO L85 PathProgramCache]: Analyzing trace with hash -2032324224, now seen corresponding path program 60 times [2021-11-02 23:18:33,909 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:33,909 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024601747] [2021-11-02 23:18:33,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:33,909 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:33,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:34,254 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-11-02 23:18:34,255 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:34,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024601747] [2021-11-02 23:18:34,255 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024601747] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:34,255 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427029900] [2021-11-02 23:18:34,255 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:18:34,255 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:34,255 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:34,256 INFO L229 MonitoredProcess]: Starting monitored process 92 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:34,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Waiting until timeout for monitored process [2021-11-02 23:18:36,175 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2021-11-02 23:18:36,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:36,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-02 23:18:36,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:36,363 INFO L134 CoverageAnalysis]: Checked inductivity of 266 backedges. 0 proven. 133 refuted. 0 times theorem prover too weak. 133 trivial. 0 not checked. [2021-11-02 23:18:36,363 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427029900] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:36,363 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:18:36,363 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-11-02 23:18:36,363 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953306087] [2021-11-02 23:18:36,363 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-02 23:18:36,363 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:36,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-02 23:18:36,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=593, Unknown=0, NotChecked=0, Total=650 [2021-11-02 23:18:36,364 INFO L87 Difference]: Start difference. First operand 1254 states and 1624 transitions. Second operand has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 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) [2021-11-02 23:18:37,731 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:37,731 INFO L93 Difference]: Finished difference Result 1644 states and 2067 transitions. [2021-11-02 23:18:37,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2021-11-02 23:18:37,732 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 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 53 [2021-11-02 23:18:37,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:37,733 INFO L225 Difference]: With dead ends: 1644 [2021-11-02 23:18:37,733 INFO L226 Difference]: Without dead ends: 1608 [2021-11-02 23:18:37,734 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 111 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=222, Invalid=3200, Unknown=0, NotChecked=0, Total=3422 [2021-11-02 23:18:37,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1608 states. [2021-11-02 23:18:37,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1608 to 1254. [2021-11-02 23:18:37,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1254 states, 1253 states have (on average 1.295291300877893) internal successors, (1623), 1253 states have internal predecessors, (1623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:37,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 1623 transitions. [2021-11-02 23:18:37,819 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 1623 transitions. Word has length 53 [2021-11-02 23:18:37,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:37,820 INFO L470 AbstractCegarLoop]: Abstraction has 1254 states and 1623 transitions. [2021-11-02 23:18:37,820 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 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) [2021-11-02 23:18:37,820 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 1623 transitions. [2021-11-02 23:18:37,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-02 23:18:37,822 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:37,822 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:37,834 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (92)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:38,031 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,92 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:38,031 INFO L402 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:38,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:38,031 INFO L85 PathProgramCache]: Analyzing trace with hash -804032594, now seen corresponding path program 61 times [2021-11-02 23:18:38,032 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:38,032 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895010353] [2021-11-02 23:18:38,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:38,032 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:38,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:38,380 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2021-11-02 23:18:38,380 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:38,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895010353] [2021-11-02 23:18:38,380 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895010353] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:38,380 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994532469] [2021-11-02 23:18:38,380 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-11-02 23:18:38,380 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:38,381 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:38,381 INFO L229 MonitoredProcess]: Starting monitored process 93 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:38,382 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Waiting until timeout for monitored process [2021-11-02 23:18:39,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:39,649 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 47 conjunts are in the unsatisfiable core [2021-11-02 23:18:39,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:39,839 INFO L134 CoverageAnalysis]: Checked inductivity of 282 backedges. 0 proven. 141 refuted. 0 times theorem prover too weak. 141 trivial. 0 not checked. [2021-11-02 23:18:39,839 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [994532469] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:39,840 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:18:39,840 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 26 [2021-11-02 23:18:39,840 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1101439688] [2021-11-02 23:18:39,840 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2021-11-02 23:18:39,840 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:39,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2021-11-02 23:18:39,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=594, Unknown=0, NotChecked=0, Total=650 [2021-11-02 23:18:39,840 INFO L87 Difference]: Start difference. First operand 1254 states and 1623 transitions. Second operand has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 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) [2021-11-02 23:18:41,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:41,311 INFO L93 Difference]: Finished difference Result 1699 states and 2126 transitions. [2021-11-02 23:18:41,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-11-02 23:18:41,312 INFO L78 Accepts]: Start accepts. Automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 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 53 [2021-11-02 23:18:41,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:41,313 INFO L225 Difference]: With dead ends: 1699 [2021-11-02 23:18:41,313 INFO L226 Difference]: Without dead ends: 1664 [2021-11-02 23:18:41,314 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=196, Invalid=2666, Unknown=0, NotChecked=0, Total=2862 [2021-11-02 23:18:41,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1664 states. [2021-11-02 23:18:41,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1664 to 1254. [2021-11-02 23:18:41,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1254 states, 1253 states have (on average 1.2944932162809257) internal successors, (1622), 1253 states have internal predecessors, (1622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:41,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1254 states to 1254 states and 1622 transitions. [2021-11-02 23:18:41,373 INFO L78 Accepts]: Start accepts. Automaton has 1254 states and 1622 transitions. Word has length 53 [2021-11-02 23:18:41,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:41,373 INFO L470 AbstractCegarLoop]: Abstraction has 1254 states and 1622 transitions. [2021-11-02 23:18:41,373 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 1.3846153846153846) internal successors, (36), 26 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) [2021-11-02 23:18:41,373 INFO L276 IsEmpty]: Start isEmpty. Operand 1254 states and 1622 transitions. [2021-11-02 23:18:41,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2021-11-02 23:18:41,375 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:41,375 INFO L513 BasicCegarLoop]: trace histogram [27, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:41,399 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (93)] Ended with exit code 0 [2021-11-02 23:18:41,575 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:41,575 INFO L402 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:41,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:41,575 INFO L85 PathProgramCache]: Analyzing trace with hash -1387691664, now seen corresponding path program 62 times [2021-11-02 23:18:41,576 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:41,576 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168725619] [2021-11-02 23:18:41,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:41,576 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:41,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:42,261 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 0 proven. 393 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-02 23:18:42,261 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:42,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168725619] [2021-11-02 23:18:42,261 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168725619] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:42,261 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [214816006] [2021-11-02 23:18:42,261 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-11-02 23:18:42,261 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:42,262 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:42,262 INFO L229 MonitoredProcess]: Starting monitored process 94 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:42,263 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Waiting until timeout for monitored process [2021-11-02 23:18:43,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-11-02 23:18:43,587 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:43,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 79 conjunts are in the unsatisfiable core [2021-11-02 23:18:43,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:43,878 INFO L134 CoverageAnalysis]: Checked inductivity of 423 backedges. 0 proven. 408 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2021-11-02 23:18:43,878 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [214816006] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:43,878 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:18:43,878 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36] total 37 [2021-11-02 23:18:43,878 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536010258] [2021-11-02 23:18:43,878 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2021-11-02 23:18:43,879 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:43,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2021-11-02 23:18:43,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=1255, Unknown=0, NotChecked=0, Total=1332 [2021-11-02 23:18:43,880 INFO L87 Difference]: Start difference. First operand 1254 states and 1622 transitions. Second operand has 37 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 37 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:46,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:46,493 INFO L93 Difference]: Finished difference Result 2254 states and 3061 transitions. [2021-11-02 23:18:46,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2021-11-02 23:18:46,493 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 37 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2021-11-02 23:18:46,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:46,494 INFO L225 Difference]: With dead ends: 2254 [2021-11-02 23:18:46,494 INFO L226 Difference]: Without dead ends: 2122 [2021-11-02 23:18:46,495 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 53 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=182, Invalid=3124, Unknown=0, NotChecked=0, Total=3306 [2021-11-02 23:18:46,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2122 states. [2021-11-02 23:18:46,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2122 to 1284. [2021-11-02 23:18:46,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1284 states, 1283 states have (on average 1.298519095869057) internal successors, (1666), 1283 states have internal predecessors, (1666), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:46,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1284 states to 1284 states and 1666 transitions. [2021-11-02 23:18:46,589 INFO L78 Accepts]: Start accepts. Automaton has 1284 states and 1666 transitions. Word has length 53 [2021-11-02 23:18:46,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:46,589 INFO L470 AbstractCegarLoop]: Abstraction has 1284 states and 1666 transitions. [2021-11-02 23:18:46,589 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 1.5135135135135136) internal successors, (56), 37 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:46,590 INFO L276 IsEmpty]: Start isEmpty. Operand 1284 states and 1666 transitions. [2021-11-02 23:18:46,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-02 23:18:46,592 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:46,592 INFO L513 BasicCegarLoop]: trace histogram [14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:46,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (94)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:46,801 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2021-11-02 23:18:46,801 INFO L402 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:46,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:46,801 INFO L85 PathProgramCache]: Analyzing trace with hash 30540777, now seen corresponding path program 15 times [2021-11-02 23:18:46,801 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:46,801 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189984029] [2021-11-02 23:18:46,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:46,802 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:46,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:47,391 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 0 proven. 316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:18:47,391 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:47,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189984029] [2021-11-02 23:18:47,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189984029] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:47,391 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906228848] [2021-11-02 23:18:47,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:18:47,392 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:47,392 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:47,402 INFO L229 MonitoredProcess]: Starting monitored process 95 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:47,403 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Waiting until timeout for monitored process [2021-11-02 23:18:50,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2021-11-02 23:18:50,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:18:50,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 92 conjunts are in the unsatisfiable core [2021-11-02 23:18:50,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:18:50,462 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 0 proven. 316 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-11-02 23:18:50,462 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906228848] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:50,462 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:18:50,462 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 32] total 33 [2021-11-02 23:18:50,463 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [685136304] [2021-11-02 23:18:50,463 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-02 23:18:50,463 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:18:50,463 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-02 23:18:50,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=991, Unknown=0, NotChecked=0, Total=1056 [2021-11-02 23:18:50,463 INFO L87 Difference]: Start difference. First operand 1284 states and 1666 transitions. Second operand has 33 states, 33 states have (on average 1.696969696969697) internal successors, (56), 33 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:58,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:18:58,736 INFO L93 Difference]: Finished difference Result 1928 states and 2663 transitions. [2021-11-02 23:18:58,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 251 states. [2021-11-02 23:18:58,736 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.696969696969697) internal successors, (56), 33 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-02 23:18:58,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:18:58,738 INFO L225 Difference]: With dead ends: 1928 [2021-11-02 23:18:58,738 INFO L226 Difference]: Without dead ends: 1729 [2021-11-02 23:18:58,740 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 319 GetRequests, 68 SyntacticMatches, 1 SemanticMatches, 250 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23871 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=971, Invalid=62281, Unknown=0, NotChecked=0, Total=63252 [2021-11-02 23:18:58,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1729 states. [2021-11-02 23:18:58,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1729 to 1312. [2021-11-02 23:18:58,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1312 states, 1311 states have (on average 1.289855072463768) internal successors, (1691), 1311 states have internal predecessors, (1691), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:58,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1312 states to 1312 states and 1691 transitions. [2021-11-02 23:18:58,796 INFO L78 Accepts]: Start accepts. Automaton has 1312 states and 1691 transitions. Word has length 54 [2021-11-02 23:18:58,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:18:58,796 INFO L470 AbstractCegarLoop]: Abstraction has 1312 states and 1691 transitions. [2021-11-02 23:18:58,796 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.696969696969697) internal successors, (56), 33 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:18:58,796 INFO L276 IsEmpty]: Start isEmpty. Operand 1312 states and 1691 transitions. [2021-11-02 23:18:58,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2021-11-02 23:18:58,798 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:18:58,798 INFO L513 BasicCegarLoop]: trace histogram [28, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:18:58,806 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (95)] Forceful destruction successful, exit code 0 [2021-11-02 23:18:58,999 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,95 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:59,000 INFO L402 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:18:59,000 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:18:59,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1939155051, now seen corresponding path program 63 times [2021-11-02 23:18:59,000 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:18:59,000 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671388090] [2021-11-02 23:18:59,000 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:18:59,000 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:18:59,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:18:59,682 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 0 proven. 421 refuted. 0 times theorem prover too weak. 30 trivial. 0 not checked. [2021-11-02 23:18:59,682 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:18:59,682 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671388090] [2021-11-02 23:18:59,682 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671388090] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:18:59,683 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704268526] [2021-11-02 23:18:59,683 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-11-02 23:18:59,683 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:18:59,683 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:18:59,707 INFO L229 MonitoredProcess]: Starting monitored process 96 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:18:59,727 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Waiting until timeout for monitored process [2021-11-02 23:19:01,229 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-11-02 23:19:01,229 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:19:01,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-02 23:19:01,231 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:01,801 INFO L134 CoverageAnalysis]: Checked inductivity of 451 backedges. 0 proven. 45 refuted. 0 times theorem prover too weak. 406 trivial. 0 not checked. [2021-11-02 23:19:01,802 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704268526] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:01,802 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:19:01,802 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 15] total 50 [2021-11-02 23:19:01,802 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607494359] [2021-11-02 23:19:01,802 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 50 states [2021-11-02 23:19:01,802 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:01,803 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 50 interpolants. [2021-11-02 23:19:01,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=2347, Unknown=0, NotChecked=0, Total=2450 [2021-11-02 23:19:01,803 INFO L87 Difference]: Start difference. First operand 1312 states and 1691 transitions. Second operand has 50 states, 50 states have (on average 1.42) internal successors, (71), 50 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:09,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:19:09,869 INFO L93 Difference]: Finished difference Result 2405 states and 3255 transitions. [2021-11-02 23:19:09,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 167 states. [2021-11-02 23:19:09,869 INFO L78 Accepts]: Start accepts. Automaton has has 50 states, 50 states have (on average 1.42) internal successors, (71), 50 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2021-11-02 23:19:09,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:19:09,871 INFO L225 Difference]: With dead ends: 2405 [2021-11-02 23:19:09,871 INFO L226 Difference]: Without dead ends: 2256 [2021-11-02 23:19:09,872 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 43 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7639 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=638, Invalid=29464, Unknown=0, NotChecked=0, Total=30102 [2021-11-02 23:19:09,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2256 states. [2021-11-02 23:19:09,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2256 to 1108. [2021-11-02 23:19:09,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1108 states, 1107 states have (on average 1.3604336043360434) internal successors, (1506), 1107 states have internal predecessors, (1506), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:09,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1108 states to 1108 states and 1506 transitions. [2021-11-02 23:19:09,944 INFO L78 Accepts]: Start accepts. Automaton has 1108 states and 1506 transitions. Word has length 54 [2021-11-02 23:19:09,944 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:19:09,944 INFO L470 AbstractCegarLoop]: Abstraction has 1108 states and 1506 transitions. [2021-11-02 23:19:09,945 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 50 states, 50 states have (on average 1.42) internal successors, (71), 50 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:09,945 INFO L276 IsEmpty]: Start isEmpty. Operand 1108 states and 1506 transitions. [2021-11-02 23:19:09,945 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-02 23:19:09,945 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:19:09,946 INFO L513 BasicCegarLoop]: trace histogram [9, 9, 9, 9, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:19:09,970 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (96)] Forceful destruction successful, exit code 0 [2021-11-02 23:19:10,146 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable99 [2021-11-02 23:19:10,146 INFO L402 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:19:10,146 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:10,146 INFO L85 PathProgramCache]: Analyzing trace with hash 899392799, now seen corresponding path program 12 times [2021-11-02 23:19:10,147 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:10,147 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123510053] [2021-11-02 23:19:10,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:10,147 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:10,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:10,365 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 9 proven. 81 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-11-02 23:19:10,365 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:10,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123510053] [2021-11-02 23:19:10,365 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123510053] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:10,365 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461582129] [2021-11-02 23:19:10,365 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-11-02 23:19:10,366 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:10,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:10,366 INFO L229 MonitoredProcess]: Starting monitored process 97 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:10,367 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Waiting until timeout for monitored process [2021-11-02 23:19:12,502 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2021-11-02 23:19:12,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:19:12,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 46 conjunts are in the unsatisfiable core [2021-11-02 23:19:12,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:12,684 INFO L134 CoverageAnalysis]: Checked inductivity of 216 backedges. 9 proven. 81 refuted. 0 times theorem prover too weak. 126 trivial. 0 not checked. [2021-11-02 23:19:12,685 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461582129] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:12,685 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:19:12,685 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2021-11-02 23:19:12,685 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096721745] [2021-11-02 23:19:12,686 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2021-11-02 23:19:12,686 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:12,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-11-02 23:19:12,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=111, Unknown=0, NotChecked=0, Total=132 [2021-11-02 23:19:12,686 INFO L87 Difference]: Start difference. First operand 1108 states and 1506 transitions. Second operand has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:14,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:19:14,620 INFO L93 Difference]: Finished difference Result 1248 states and 1662 transitions. [2021-11-02 23:19:14,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-11-02 23:19:14,621 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 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 55 [2021-11-02 23:19:14,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:19:14,622 INFO L225 Difference]: With dead ends: 1248 [2021-11-02 23:19:14,622 INFO L226 Difference]: Without dead ends: 1224 [2021-11-02 23:19:14,623 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 62 SyntacticMatches, 2 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=250, Invalid=1310, Unknown=0, NotChecked=0, Total=1560 [2021-11-02 23:19:14,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1224 states. [2021-11-02 23:19:14,728 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1224 to 1154. [2021-11-02 23:19:14,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1154 states, 1153 states have (on average 1.3477883781439723) internal successors, (1554), 1153 states have internal predecessors, (1554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:14,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1154 states to 1154 states and 1554 transitions. [2021-11-02 23:19:14,731 INFO L78 Accepts]: Start accepts. Automaton has 1154 states and 1554 transitions. Word has length 55 [2021-11-02 23:19:14,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:19:14,732 INFO L470 AbstractCegarLoop]: Abstraction has 1154 states and 1554 transitions. [2021-11-02 23:19:14,732 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 2.6666666666666665) internal successors, (32), 12 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:14,732 INFO L276 IsEmpty]: Start isEmpty. Operand 1154 states and 1554 transitions. [2021-11-02 23:19:14,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-02 23:19:14,733 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:19:14,734 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:19:14,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (97)] Forceful destruction successful, exit code 0 [2021-11-02 23:19:14,943 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2021-11-02 23:19:14,943 INFO L402 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:19:14,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:14,944 INFO L85 PathProgramCache]: Analyzing trace with hash 30564048, now seen corresponding path program 64 times [2021-11-02 23:19:14,944 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:14,944 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946135252] [2021-11-02 23:19:14,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:14,944 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:14,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:15,316 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-11-02 23:19:15,317 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:15,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946135252] [2021-11-02 23:19:15,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1946135252] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:15,317 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123853168] [2021-11-02 23:19:15,317 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:19:15,317 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:15,317 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:15,318 INFO L229 MonitoredProcess]: Starting monitored process 98 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:15,318 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Waiting until timeout for monitored process [2021-11-02 23:19:16,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:19:16,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:19:16,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 49 conjunts are in the unsatisfiable core [2021-11-02 23:19:16,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:16,944 INFO L134 CoverageAnalysis]: Checked inductivity of 296 backedges. 0 proven. 148 refuted. 0 times theorem prover too weak. 148 trivial. 0 not checked. [2021-11-02 23:19:16,944 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123853168] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:16,944 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:19:16,944 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 27 [2021-11-02 23:19:16,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [286246505] [2021-11-02 23:19:16,945 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2021-11-02 23:19:16,945 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:16,945 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2021-11-02 23:19:16,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=643, Unknown=0, NotChecked=0, Total=702 [2021-11-02 23:19:16,945 INFO L87 Difference]: Start difference. First operand 1154 states and 1554 transitions. Second operand has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:18,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:19:18,607 INFO L93 Difference]: Finished difference Result 1619 states and 2079 transitions. [2021-11-02 23:19:18,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2021-11-02 23:19:18,607 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-02 23:19:18,608 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:19:18,609 INFO L225 Difference]: With dead ends: 1619 [2021-11-02 23:19:18,609 INFO L226 Difference]: Without dead ends: 1582 [2021-11-02 23:19:18,609 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 55 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=234, Invalid=3548, Unknown=0, NotChecked=0, Total=3782 [2021-11-02 23:19:18,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1582 states. [2021-11-02 23:19:18,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1582 to 1154. [2021-11-02 23:19:18,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1154 states, 1153 states have (on average 1.346921075455334) internal successors, (1553), 1153 states have internal predecessors, (1553), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:18,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1154 states to 1154 states and 1553 transitions. [2021-11-02 23:19:18,677 INFO L78 Accepts]: Start accepts. Automaton has 1154 states and 1553 transitions. Word has length 55 [2021-11-02 23:19:18,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:19:18,678 INFO L470 AbstractCegarLoop]: Abstraction has 1154 states and 1553 transitions. [2021-11-02 23:19:18,678 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 1.3703703703703705) internal successors, (37), 27 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:18,678 INFO L276 IsEmpty]: Start isEmpty. Operand 1154 states and 1553 transitions. [2021-11-02 23:19:18,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2021-11-02 23:19:18,679 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:19:18,679 INFO L513 BasicCegarLoop]: trace histogram [16, 16, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:19:18,718 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (98)] Ended with exit code 0 [2021-11-02 23:19:18,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2021-11-02 23:19:18,893 INFO L402 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:19:18,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:18,893 INFO L85 PathProgramCache]: Analyzing trace with hash -1320136992, now seen corresponding path program 65 times [2021-11-02 23:19:18,893 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:18,893 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [386266875] [2021-11-02 23:19:18,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:18,894 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:18,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:19,270 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-11-02 23:19:19,271 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:19,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [386266875] [2021-11-02 23:19:19,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [386266875] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:19,271 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60022959] [2021-11-02 23:19:19,271 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-11-02 23:19:19,271 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:19,271 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:19,272 INFO L229 MonitoredProcess]: Starting monitored process 99 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:19,272 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Waiting until timeout for monitored process [2021-11-02 23:19:30,467 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2021-11-02 23:19:30,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:19:30,478 INFO L263 TraceCheckSpWp]: Trace formula consists of 271 conjuncts, 62 conjunts are in the unsatisfiable core [2021-11-02 23:19:30,479 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:30,882 INFO L134 CoverageAnalysis]: Checked inductivity of 314 backedges. 0 proven. 157 refuted. 0 times theorem prover too weak. 157 trivial. 0 not checked. [2021-11-02 23:19:30,882 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60022959] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:30,882 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:19:30,882 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 33 [2021-11-02 23:19:30,882 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193015316] [2021-11-02 23:19:30,882 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2021-11-02 23:19:30,882 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:30,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2021-11-02 23:19:30,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=967, Unknown=0, NotChecked=0, Total=1056 [2021-11-02 23:19:30,883 INFO L87 Difference]: Start difference. First operand 1154 states and 1553 transitions. Second operand has 33 states, 33 states have (on average 1.303030303030303) internal successors, (43), 33 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:32,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-11-02 23:19:32,531 INFO L93 Difference]: Finished difference Result 1678 states and 2143 transitions. [2021-11-02 23:19:32,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2021-11-02 23:19:32,532 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 1.303030303030303) internal successors, (43), 33 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2021-11-02 23:19:32,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-11-02 23:19:32,533 INFO L225 Difference]: With dead ends: 1678 [2021-11-02 23:19:32,533 INFO L226 Difference]: Without dead ends: 1642 [2021-11-02 23:19:32,534 INFO L786 BasicCegarLoop]: 0 DeclaredPredicates, 102 GetRequests, 49 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=203, Invalid=2659, Unknown=0, NotChecked=0, Total=2862 [2021-11-02 23:19:32,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1642 states. [2021-11-02 23:19:32,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1642 to 1154. [2021-11-02 23:19:32,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1154 states, 1153 states have (on average 1.3460537727666955) internal successors, (1552), 1153 states have internal predecessors, (1552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:32,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1154 states to 1154 states and 1552 transitions. [2021-11-02 23:19:32,605 INFO L78 Accepts]: Start accepts. Automaton has 1154 states and 1552 transitions. Word has length 55 [2021-11-02 23:19:32,605 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-11-02 23:19:32,605 INFO L470 AbstractCegarLoop]: Abstraction has 1154 states and 1552 transitions. [2021-11-02 23:19:32,605 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 1.303030303030303) internal successors, (43), 33 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:19:32,605 INFO L276 IsEmpty]: Start isEmpty. Operand 1154 states and 1552 transitions. [2021-11-02 23:19:32,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2021-11-02 23:19:32,606 INFO L505 BasicCegarLoop]: Found error trace [2021-11-02 23:19:32,606 INFO L513 BasicCegarLoop]: trace histogram [15, 15, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-11-02 23:19:32,618 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (99)] Forceful destruction successful, exit code 0 [2021-11-02 23:19:32,806 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,99 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:32,807 INFO L402 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2021-11-02 23:19:32,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-11-02 23:19:32,807 INFO L85 PathProgramCache]: Analyzing trace with hash 238322907, now seen corresponding path program 16 times [2021-11-02 23:19:32,807 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-11-02 23:19:32,807 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307374953] [2021-11-02 23:19:32,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-11-02 23:19:32,807 INFO L126 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-11-02 23:19:32,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-11-02 23:19:33,393 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 0 proven. 225 refuted. 0 times theorem prover too weak. 121 trivial. 0 not checked. [2021-11-02 23:19:33,393 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-11-02 23:19:33,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307374953] [2021-11-02 23:19:33,393 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307374953] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:33,393 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408613937] [2021-11-02 23:19:33,393 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-11-02 23:19:33,393 INFO L168 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-11-02 23:19:33,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 [2021-11-02 23:19:33,394 INFO L229 MonitoredProcess]: Starting monitored process 100 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-11-02 23:19:33,395 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_06bb99b7-0203-4261-a663-a546fb5ec92b/bin/uautomizer-tBqnrhUYjU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (100)] Waiting until timeout for monitored process [2021-11-02 23:19:34,840 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-11-02 23:19:34,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-11-02 23:19:34,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 60 conjunts are in the unsatisfiable core [2021-11-02 23:19:34,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-11-02 23:19:35,562 INFO L134 CoverageAnalysis]: Checked inductivity of 346 backedges. 28 proven. 196 refuted. 0 times theorem prover too weak. 122 trivial. 0 not checked. [2021-11-02 23:19:35,562 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408613937] provided 0 perfect and 1 imperfect interpolant sequences [2021-11-02 23:19:35,562 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-11-02 23:19:35,562 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 17] total 48 [2021-11-02 23:19:35,562 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [190137419] [2021-11-02 23:19:35,563 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2021-11-02 23:19:35,563 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-11-02 23:19:35,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2021-11-02 23:19:35,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=2149, Unknown=0, NotChecked=0, Total=2256 [2021-11-02 23:19:35,564 INFO L87 Difference]: Start difference. First operand 1154 states and 1552 transitions. Second operand has 48 states, 48 states have (on average 1.625) internal successors, (78), 48 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-11-02 23:20:00,104 WARN L207 SmtUtils]: Spent 6.01 s on a formula simplification that was a NOOP. DAG size: 63 [2021-11-02 23:20:19,800 WARN L207 SmtUtils]: Spent 6.24 s on a formula simplification that was a NOOP. DAG size: 66 [2021-11-02 23:20:34,085 WARN L207 SmtUtils]: Spent 6.05 s on a formula simplification that was a NOOP. DAG size: 63 [2021-11-02 23:20:44,439 WARN L838 $PredicateComparison]: unable to prove that (and (< 0 (mod (+ c_ULTIMATE.start_main_~x~0 9) 4294967296)) (< 0 (mod c_ULTIMATE.start_main_~x~0 4294967296)) (<= 8 c_ULTIMATE.start_main_~z~0) (< 0 (mod (+ c_ULTIMATE.start_main_~x~0 5) 4294967296)) (< 0 (mod (+ c_ULTIMATE.start_main_~x~0 11) 4294967296)) (< 0 (mod (+ c_ULTIMATE.start_main_~x~0 13) 4294967296)) (< 0 (mod (+ c_ULTIMATE.start_main_~x~0 6) 4294967296)) (< 0 (mod (+ c_ULTIMATE.start_main_~x~0 3) 4294967296)) (< 0 (mod (+ c_ULTIMATE.start_main_~x~0 2) 4294967296)) (<= c_ULTIMATE.start_main_~z~0 8) (< 0 (mod (+ c_ULTIMATE.start_main_~x~0 1) 4294967296)) (< 0 (mod (+ c_ULTIMATE.start_main_~x~0 8) 4294967296)) (< 0 (mod (+ c_ULTIMATE.start_main_~x~0 7) 4294967296)) (< 0 (mod (+ c_ULTIMATE.start_main_~x~0 4) 4294967296)) (< 0 (mod (+ c_ULTIMATE.start_main_~x~0 12) 4294967296)) (< 0 (mod (+ c_ULTIMATE.start_main_~x~0 10) 4294967296))) is different from false [2021-11-02 23:21:03,288 WARN L207 SmtUtils]: Spent 9.40 s on a formula simplification that was a NOOP. DAG size: 66