./Ultimate.py --spec ../../sv-benchmarks/c/properties/no-overflow.prp --file ../../sv-benchmarks/c/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for overflows Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c479c2f-969a-4ade-a34d-6ac90882bcf5/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c479c2f-969a-4ade-a34d-6ac90882bcf5/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c479c2f-969a-4ade-a34d-6ac90882bcf5/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c479c2f-969a-4ade-a34d-6ac90882bcf5/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c479c2f-969a-4ade-a34d-6ac90882bcf5/bin/uautomizer-TMbwUNV5ro/config/svcomp-Overflow-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c479c2f-969a-4ade-a34d-6ac90882bcf5/bin/uautomizer-TMbwUNV5ro --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! overflow) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash ec11f673f0852354e1b011c47ea1690182c02849435cfe6b9232c63dc6ffceb8 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 19:35:26,623 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 19:35:26,625 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 19:35:26,656 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 19:35:26,657 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 19:35:26,661 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 19:35:26,664 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 19:35:26,667 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 19:35:26,669 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 19:35:26,674 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 19:35:26,676 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 19:35:26,677 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 19:35:26,679 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 19:35:26,681 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 19:35:26,683 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 19:35:26,685 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 19:35:26,686 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 19:35:26,687 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 19:35:26,689 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 19:35:26,694 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 19:35:26,698 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 19:35:26,699 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 19:35:26,701 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 19:35:26,703 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 19:35:26,709 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 19:35:26,713 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 19:35:26,713 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 19:35:26,714 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 19:35:26,716 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 19:35:26,717 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 19:35:26,718 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 19:35:26,719 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 19:35:26,720 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 19:35:26,722 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 19:35:26,724 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 19:35:26,725 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 19:35:26,726 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 19:35:26,726 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 19:35:26,726 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 19:35:26,727 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 19:35:26,727 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 19:35:26,728 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c479c2f-969a-4ade-a34d-6ac90882bcf5/bin/uautomizer-TMbwUNV5ro/config/svcomp-Overflow-32bit-Automizer_Default.epf [2022-11-18 19:35:26,770 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 19:35:26,771 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 19:35:26,772 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 19:35:26,772 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 19:35:26,773 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 19:35:26,773 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 19:35:26,774 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 19:35:26,774 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 19:35:26,774 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 19:35:26,775 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 19:35:26,776 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 19:35:26,776 INFO L138 SettingsManager]: * Check unreachability of error function in SV-COMP mode=false [2022-11-18 19:35:26,776 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 19:35:26,776 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 19:35:26,776 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 19:35:26,777 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 19:35:26,777 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 19:35:26,777 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 19:35:26,777 INFO L138 SettingsManager]: * Check absence of signed integer overflows=true [2022-11-18 19:35:26,777 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 19:35:26,778 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 19:35:26,778 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 19:35:26,778 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 19:35:26,778 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 19:35:26,779 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 19:35:26,779 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 19:35:26,779 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:35:26,779 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 19:35:26,779 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 19:35:26,780 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 19:35:26,780 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 19:35:26,780 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 19:35:26,780 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 19:35:26,781 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 19:35:26,781 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 19:35:26,782 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_7c479c2f-969a-4ade-a34d-6ac90882bcf5/bin/uautomizer-TMbwUNV5ro/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c479c2f-969a-4ade-a34d-6ac90882bcf5/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! overflow) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> ec11f673f0852354e1b011c47ea1690182c02849435cfe6b9232c63dc6ffceb8 [2022-11-18 19:35:27,052 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 19:35:27,082 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 19:35:27,104 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 19:35:27,106 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 19:35:27,107 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 19:35:27,108 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c479c2f-969a-4ade-a34d-6ac90882bcf5/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c [2022-11-18 19:35:27,178 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c479c2f-969a-4ade-a34d-6ac90882bcf5/bin/uautomizer-TMbwUNV5ro/data/a48c06b67/b3e3296abdf348b7b7fde5bf7804531e/FLAG530daf471 [2022-11-18 19:35:27,744 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 19:35:27,745 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c479c2f-969a-4ade-a34d-6ac90882bcf5/sv-benchmarks/c/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c [2022-11-18 19:35:27,751 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c479c2f-969a-4ade-a34d-6ac90882bcf5/bin/uautomizer-TMbwUNV5ro/data/a48c06b67/b3e3296abdf348b7b7fde5bf7804531e/FLAG530daf471 [2022-11-18 19:35:28,104 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c479c2f-969a-4ade-a34d-6ac90882bcf5/bin/uautomizer-TMbwUNV5ro/data/a48c06b67/b3e3296abdf348b7b7fde5bf7804531e [2022-11-18 19:35:28,107 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 19:35:28,108 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 19:35:28,114 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 19:35:28,114 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 19:35:28,117 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 19:35:28,122 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:35:28" (1/1) ... [2022-11-18 19:35:28,125 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c59cd93 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:35:28, skipping insertion in model container [2022-11-18 19:35:28,126 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 07:35:28" (1/1) ... [2022-11-18 19:35:28,134 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 19:35:28,158 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 19:35:28,358 WARN L234 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_7c479c2f-969a-4ade-a34d-6ac90882bcf5/sv-benchmarks/c/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c[2611,2624] [2022-11-18 19:35:28,360 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:35:28,368 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 19:35:28,392 WARN L234 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_7c479c2f-969a-4ade-a34d-6ac90882bcf5/sv-benchmarks/c/weaver/popl20-proofs-counter-add-4-semi-Q67.wvr.c[2611,2624] [2022-11-18 19:35:28,393 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 19:35:28,406 INFO L208 MainTranslator]: Completed translation [2022-11-18 19:35:28,407 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:35:28 WrapperNode [2022-11-18 19:35:28,407 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 19:35:28,408 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 19:35:28,408 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 19:35:28,408 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 19:35:28,416 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:35:28" (1/1) ... [2022-11-18 19:35:28,440 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:35:28" (1/1) ... [2022-11-18 19:35:28,462 INFO L138 Inliner]: procedures = 22, calls = 42, calls flagged for inlining = 6, calls inlined = 6, statements flattened = 141 [2022-11-18 19:35:28,462 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 19:35:28,463 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 19:35:28,463 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 19:35:28,463 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 19:35:28,473 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:35:28" (1/1) ... [2022-11-18 19:35:28,473 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:35:28" (1/1) ... [2022-11-18 19:35:28,475 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:35:28" (1/1) ... [2022-11-18 19:35:28,476 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:35:28" (1/1) ... [2022-11-18 19:35:28,481 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:35:28" (1/1) ... [2022-11-18 19:35:28,485 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:35:28" (1/1) ... [2022-11-18 19:35:28,487 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:35:28" (1/1) ... [2022-11-18 19:35:28,488 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:35:28" (1/1) ... [2022-11-18 19:35:28,491 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 19:35:28,492 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 19:35:28,492 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 19:35:28,492 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 19:35:28,496 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:35:28" (1/1) ... [2022-11-18 19:35:28,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 19:35:28,514 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c479c2f-969a-4ade-a34d-6ac90882bcf5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:35:28,525 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c479c2f-969a-4ade-a34d-6ac90882bcf5/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 19:35:28,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c479c2f-969a-4ade-a34d-6ac90882bcf5/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 19:35:28,567 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 19:35:28,568 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-18 19:35:28,568 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-18 19:35:28,568 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-18 19:35:28,568 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-18 19:35:28,569 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2022-11-18 19:35:28,569 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2022-11-18 19:35:28,569 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2022-11-18 19:35:28,569 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2022-11-18 19:35:28,569 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 19:35:28,569 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 19:35:28,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 19:35:28,570 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-18 19:35:28,570 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-18 19:35:28,570 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 19:35:28,570 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 19:35:28,570 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 19:35:28,571 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 19:35:28,572 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 19:35:28,698 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 19:35:28,701 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 19:35:29,166 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 19:35:29,416 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 19:35:29,417 INFO L300 CfgBuilder]: Removed 4 assume(true) statements. [2022-11-18 19:35:29,420 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:35:29 BoogieIcfgContainer [2022-11-18 19:35:29,420 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 19:35:29,423 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 19:35:29,423 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 19:35:29,427 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 19:35:29,428 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 07:35:28" (1/3) ... [2022-11-18 19:35:29,428 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@392f6461 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:35:29, skipping insertion in model container [2022-11-18 19:35:29,429 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 07:35:28" (2/3) ... [2022-11-18 19:35:29,429 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@392f6461 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 07:35:29, skipping insertion in model container [2022-11-18 19:35:29,430 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 07:35:29" (3/3) ... [2022-11-18 19:35:29,431 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-proofs-counter-add-4-semi-Q67.wvr.c [2022-11-18 19:35:29,441 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-18 19:35:29,453 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 19:35:29,454 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2022-11-18 19:35:29,454 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 19:35:29,541 INFO L144 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2022-11-18 19:35:29,583 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 149 places, 146 transitions, 324 flow [2022-11-18 19:35:29,659 INFO L130 PetriNetUnfolder]: 10/142 cut-off events. [2022-11-18 19:35:29,659 INFO L131 PetriNetUnfolder]: For 4/4 co-relation queries the response was YES. [2022-11-18 19:35:29,666 INFO L83 FinitePrefix]: Finished finitePrefix Result has 159 conditions, 142 events. 10/142 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 126 event pairs, 0 based on Foata normal form. 0/116 useless extension candidates. Maximal degree in co-relation 102. Up to 2 conditions per place. [2022-11-18 19:35:29,667 INFO L82 GeneralOperation]: Start removeDead. Operand has 149 places, 146 transitions, 324 flow [2022-11-18 19:35:29,672 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 123 places, 119 transitions, 259 flow [2022-11-18 19:35:29,682 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 19:35:29,689 INFO L357 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, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@67676f23, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 19:35:29,689 INFO L358 AbstractCegarLoop]: Starting to check reachability of 36 error locations. [2022-11-18 19:35:29,706 INFO L130 PetriNetUnfolder]: 3/55 cut-off events. [2022-11-18 19:35:29,707 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 19:35:29,707 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:35:29,708 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:35:29,709 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-18 19:35:29,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:35:29,714 INFO L85 PathProgramCache]: Analyzing trace with hash -1875315823, now seen corresponding path program 1 times [2022-11-18 19:35:29,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:35:29,726 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877197964] [2022-11-18 19:35:29,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:35:29,727 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:35:29,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:35:30,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:35:30,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:35:30,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877197964] [2022-11-18 19:35:30,241 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877197964] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:35:30,241 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:35:30,241 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 19:35:30,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018249620] [2022-11-18 19:35:30,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:35:30,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:35:30,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:35:30,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:35:30,285 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:35:30,287 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 146 [2022-11-18 19:35:30,291 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 119 transitions, 259 flow. Second operand has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:35:30,294 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:35:30,295 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 146 [2022-11-18 19:35:30,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:35:31,260 INFO L130 PetriNetUnfolder]: 1853/2598 cut-off events. [2022-11-18 19:35:31,261 INFO L131 PetriNetUnfolder]: For 450/460 co-relation queries the response was YES. [2022-11-18 19:35:31,272 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5459 conditions, 2598 events. 1853/2598 cut-off events. For 450/460 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 11071 event pairs, 813 based on Foata normal form. 527/1302 useless extension candidates. Maximal degree in co-relation 5172. Up to 2483 conditions per place. [2022-11-18 19:35:31,300 INFO L137 encePairwiseOnDemand]: 120/146 looper letters, 30 selfloop transitions, 7 changer transitions 2/124 dead transitions. [2022-11-18 19:35:31,300 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 124 transitions, 363 flow [2022-11-18 19:35:31,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:35:31,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 19:35:31,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 390 transitions. [2022-11-18 19:35:31,328 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8904109589041096 [2022-11-18 19:35:31,329 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 390 transitions. [2022-11-18 19:35:31,330 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 390 transitions. [2022-11-18 19:35:31,334 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:35:31,338 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 390 transitions. [2022-11-18 19:35:31,343 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 130.0) internal successors, (390), 3 states have internal predecessors, (390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:35:31,353 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:35:31,354 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:35:31,356 INFO L175 Difference]: Start difference. First operand has 123 places, 119 transitions, 259 flow. Second operand 3 states and 390 transitions. [2022-11-18 19:35:31,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 124 transitions, 363 flow [2022-11-18 19:35:31,367 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 124 transitions, 339 flow, removed 0 selfloop flow, removed 7 redundant places. [2022-11-18 19:35:31,371 INFO L231 Difference]: Finished difference. Result has 117 places, 117 transitions, 299 flow [2022-11-18 19:35:31,374 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=232, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=299, PETRI_PLACES=117, PETRI_TRANSITIONS=117} [2022-11-18 19:35:31,380 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, -6 predicate places. [2022-11-18 19:35:31,382 INFO L495 AbstractCegarLoop]: Abstraction has has 117 places, 117 transitions, 299 flow [2022-11-18 19:35:31,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:35:31,382 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:35:31,383 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:35:31,383 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 19:35:31,384 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-18 19:35:31,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:35:31,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1875315821, now seen corresponding path program 1 times [2022-11-18 19:35:31,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:35:31,386 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498383587] [2022-11-18 19:35:31,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:35:31,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:35:31,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:35:31,573 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:35:31,576 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:35:31,577 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498383587] [2022-11-18 19:35:31,577 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498383587] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:35:31,577 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:35:31,578 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 19:35:31,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224662298] [2022-11-18 19:35:31,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:35:31,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:35:31,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:35:31,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:35:31,584 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:35:31,585 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 146 [2022-11-18 19:35:31,587 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 117 transitions, 299 flow. Second operand has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:35:31,636 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:35:31,636 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 146 [2022-11-18 19:35:31,636 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:35:32,825 INFO L130 PetriNetUnfolder]: 4265/5926 cut-off events. [2022-11-18 19:35:32,826 INFO L131 PetriNetUnfolder]: For 292/360 co-relation queries the response was YES. [2022-11-18 19:35:32,840 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17020 conditions, 5926 events. 4265/5926 cut-off events. For 292/360 co-relation queries the response was YES. Maximal size of possible extension queue 506. Compared 31105 event pairs, 2898 based on Foata normal form. 0/1812 useless extension candidates. Maximal degree in co-relation 9766. Up to 4810 conditions per place. [2022-11-18 19:35:32,907 INFO L137 encePairwiseOnDemand]: 142/146 looper letters, 53 selfloop transitions, 3 changer transitions 0/139 dead transitions. [2022-11-18 19:35:32,908 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 118 places, 139 transitions, 488 flow [2022-11-18 19:35:32,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:35:32,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 19:35:32,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 378 transitions. [2022-11-18 19:35:32,910 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.863013698630137 [2022-11-18 19:35:32,910 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 378 transitions. [2022-11-18 19:35:32,910 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 378 transitions. [2022-11-18 19:35:32,911 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:35:32,911 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 378 transitions. [2022-11-18 19:35:32,912 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 126.0) internal successors, (378), 3 states have internal predecessors, (378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:35:32,915 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:35:32,916 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:35:32,916 INFO L175 Difference]: Start difference. First operand has 117 places, 117 transitions, 299 flow. Second operand 3 states and 378 transitions. [2022-11-18 19:35:32,917 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 118 places, 139 transitions, 488 flow [2022-11-18 19:35:32,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 139 transitions, 483 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 19:35:32,933 INFO L231 Difference]: Finished difference. Result has 118 places, 116 transitions, 303 flow [2022-11-18 19:35:32,933 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=284, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=303, PETRI_PLACES=118, PETRI_TRANSITIONS=116} [2022-11-18 19:35:32,935 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, -5 predicate places. [2022-11-18 19:35:32,935 INFO L495 AbstractCegarLoop]: Abstraction has has 118 places, 116 transitions, 303 flow [2022-11-18 19:35:32,935 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 109.33333333333333) internal successors, (328), 3 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:35:32,935 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:35:32,936 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:35:32,936 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 19:35:32,937 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-18 19:35:32,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:35:32,938 INFO L85 PathProgramCache]: Analyzing trace with hash 1707777113, now seen corresponding path program 1 times [2022-11-18 19:35:32,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:35:32,939 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973377361] [2022-11-18 19:35:32,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:35:32,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:35:32,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:35:33,081 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:35:33,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:35:33,082 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973377361] [2022-11-18 19:35:33,082 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [973377361] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:35:33,083 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141695981] [2022-11-18 19:35:33,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:35:33,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:35:33,084 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c479c2f-969a-4ade-a34d-6ac90882bcf5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:35:33,087 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c479c2f-969a-4ade-a34d-6ac90882bcf5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:35:33,121 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c479c2f-969a-4ade-a34d-6ac90882bcf5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 19:35:33,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:35:33,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 19:35:33,210 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:35:33,311 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:35:33,312 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:35:33,402 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:35:33,403 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141695981] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:35:33,403 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:35:33,403 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-18 19:35:33,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300567514] [2022-11-18 19:35:33,404 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:35:33,405 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 19:35:33,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:35:33,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 19:35:33,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-18 19:35:33,407 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 146 [2022-11-18 19:35:33,408 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 116 transitions, 303 flow. Second operand has 7 states, 7 states have (on average 110.28571428571429) internal successors, (772), 7 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:35:33,408 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:35:33,409 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 146 [2022-11-18 19:35:33,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:35:36,152 INFO L130 PetriNetUnfolder]: 10067/14831 cut-off events. [2022-11-18 19:35:36,153 INFO L131 PetriNetUnfolder]: For 1695/1716 co-relation queries the response was YES. [2022-11-18 19:35:36,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41788 conditions, 14831 events. 10067/14831 cut-off events. For 1695/1716 co-relation queries the response was YES. Maximal size of possible extension queue 905. Compared 96746 event pairs, 2429 based on Foata normal form. 1/6127 useless extension candidates. Maximal degree in co-relation 32517. Up to 11182 conditions per place. [2022-11-18 19:35:36,358 INFO L137 encePairwiseOnDemand]: 142/146 looper letters, 137 selfloop transitions, 10 changer transitions 0/230 dead transitions. [2022-11-18 19:35:36,358 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 230 transitions, 1027 flow [2022-11-18 19:35:36,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 19:35:36,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-18 19:35:36,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 902 transitions. [2022-11-18 19:35:36,362 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8825831702544031 [2022-11-18 19:35:36,362 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 902 transitions. [2022-11-18 19:35:36,362 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 902 transitions. [2022-11-18 19:35:36,363 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:35:36,363 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 902 transitions. [2022-11-18 19:35:36,366 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 128.85714285714286) internal successors, (902), 7 states have internal predecessors, (902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:35:36,369 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 146.0) internal successors, (1168), 8 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:35:36,370 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 146.0) internal successors, (1168), 8 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:35:36,370 INFO L175 Difference]: Start difference. First operand has 118 places, 116 transitions, 303 flow. Second operand 7 states and 902 transitions. [2022-11-18 19:35:36,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 230 transitions, 1027 flow [2022-11-18 19:35:36,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 230 transitions, 1024 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 19:35:36,379 INFO L231 Difference]: Finished difference. Result has 126 places, 122 transitions, 374 flow [2022-11-18 19:35:36,379 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=374, PETRI_PLACES=126, PETRI_TRANSITIONS=122} [2022-11-18 19:35:36,382 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, 3 predicate places. [2022-11-18 19:35:36,382 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 122 transitions, 374 flow [2022-11-18 19:35:36,383 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 110.28571428571429) internal successors, (772), 7 states have internal predecessors, (772), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:35:36,383 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:35:36,384 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:35:36,390 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c479c2f-969a-4ade-a34d-6ac90882bcf5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 19:35:36,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c479c2f-969a-4ade-a34d-6ac90882bcf5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:35:36,591 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-18 19:35:36,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:35:36,592 INFO L85 PathProgramCache]: Analyzing trace with hash 1707777111, now seen corresponding path program 1 times [2022-11-18 19:35:36,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:35:36,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858138056] [2022-11-18 19:35:36,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:35:36,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:35:36,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:35:36,758 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:35:36,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:35:36,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858138056] [2022-11-18 19:35:36,759 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858138056] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:35:36,759 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556273542] [2022-11-18 19:35:36,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:35:36,760 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:35:36,760 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c479c2f-969a-4ade-a34d-6ac90882bcf5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:35:36,762 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c479c2f-969a-4ade-a34d-6ac90882bcf5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:35:36,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c479c2f-969a-4ade-a34d-6ac90882bcf5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 19:35:36,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:35:36,867 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 19:35:36,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:35:36,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:35:36,940 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:35:37,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:35:37,016 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556273542] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:35:37,017 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:35:37,017 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 6 [2022-11-18 19:35:37,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85585418] [2022-11-18 19:35:37,022 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:35:37,024 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 19:35:37,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:35:37,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 19:35:37,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2022-11-18 19:35:37,027 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 146 [2022-11-18 19:35:37,029 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 122 transitions, 374 flow. Second operand has 7 states, 7 states have (on average 110.57142857142857) internal successors, (774), 7 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:35:37,029 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:35:37,029 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 146 [2022-11-18 19:35:37,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:35:41,718 INFO L130 PetriNetUnfolder]: 14963/27591 cut-off events. [2022-11-18 19:35:41,718 INFO L131 PetriNetUnfolder]: For 17864/17974 co-relation queries the response was YES. [2022-11-18 19:35:41,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78814 conditions, 27591 events. 14963/27591 cut-off events. For 17864/17974 co-relation queries the response was YES. Maximal size of possible extension queue 2093. Compared 264977 event pairs, 1992 based on Foata normal form. 1169/16010 useless extension candidates. Maximal degree in co-relation 39668. Up to 18739 conditions per place. [2022-11-18 19:35:41,985 INFO L137 encePairwiseOnDemand]: 127/146 looper letters, 67 selfloop transitions, 90 changer transitions 0/242 dead transitions. [2022-11-18 19:35:41,986 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 242 transitions, 1409 flow [2022-11-18 19:35:41,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-18 19:35:41,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-18 19:35:41,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 908 transitions. [2022-11-18 19:35:41,989 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8884540117416829 [2022-11-18 19:35:41,989 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 908 transitions. [2022-11-18 19:35:41,989 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 908 transitions. [2022-11-18 19:35:41,990 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:35:41,990 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 908 transitions. [2022-11-18 19:35:41,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 129.71428571428572) internal successors, (908), 7 states have internal predecessors, (908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:35:41,994 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 146.0) internal successors, (1168), 8 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:35:41,995 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 146.0) internal successors, (1168), 8 states have internal predecessors, (1168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:35:41,996 INFO L175 Difference]: Start difference. First operand has 126 places, 122 transitions, 374 flow. Second operand 7 states and 908 transitions. [2022-11-18 19:35:41,996 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 242 transitions, 1409 flow [2022-11-18 19:35:42,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 242 transitions, 1329 flow, removed 36 selfloop flow, removed 1 redundant places. [2022-11-18 19:35:42,020 INFO L231 Difference]: Finished difference. Result has 136 places, 207 transitions, 1361 flow [2022-11-18 19:35:42,021 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=359, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1361, PETRI_PLACES=136, PETRI_TRANSITIONS=207} [2022-11-18 19:35:42,022 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, 13 predicate places. [2022-11-18 19:35:42,022 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 207 transitions, 1361 flow [2022-11-18 19:35:42,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 110.57142857142857) internal successors, (774), 7 states have internal predecessors, (774), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:35:42,023 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:35:42,023 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:35:42,044 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c479c2f-969a-4ade-a34d-6ac90882bcf5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 19:35:42,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c479c2f-969a-4ade-a34d-6ac90882bcf5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:35:42,240 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err3ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-18 19:35:42,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:35:42,241 INFO L85 PathProgramCache]: Analyzing trace with hash 1707777114, now seen corresponding path program 1 times [2022-11-18 19:35:42,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:35:42,241 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1720047089] [2022-11-18 19:35:42,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:35:42,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:35:42,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:35:42,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:35:42,318 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:35:42,318 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1720047089] [2022-11-18 19:35:42,319 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1720047089] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:35:42,319 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897093239] [2022-11-18 19:35:42,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:35:42,319 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:35:42,320 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c479c2f-969a-4ade-a34d-6ac90882bcf5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:35:42,321 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c479c2f-969a-4ade-a34d-6ac90882bcf5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:35:42,344 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c479c2f-969a-4ade-a34d-6ac90882bcf5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 19:35:42,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:35:42,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 19:35:42,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:35:42,506 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:35:42,506 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:35:42,506 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897093239] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:35:42,506 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:35:42,507 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-11-18 19:35:42,507 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796928634] [2022-11-18 19:35:42,507 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:35:42,507 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:35:42,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:35:42,508 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:35:42,508 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:35:42,509 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 146 [2022-11-18 19:35:42,509 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 207 transitions, 1361 flow. Second operand has 4 states, 4 states have (on average 109.5) internal successors, (438), 4 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) [2022-11-18 19:35:42,510 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:35:42,510 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 146 [2022-11-18 19:35:42,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:35:47,692 INFO L130 PetriNetUnfolder]: 20716/35414 cut-off events. [2022-11-18 19:35:47,692 INFO L131 PetriNetUnfolder]: For 47411/47846 co-relation queries the response was YES. [2022-11-18 19:35:47,828 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157942 conditions, 35414 events. 20716/35414 cut-off events. For 47411/47846 co-relation queries the response was YES. Maximal size of possible extension queue 2436. Compared 322254 event pairs, 9122 based on Foata normal form. 605/22245 useless extension candidates. Maximal degree in co-relation 114248. Up to 24967 conditions per place. [2022-11-18 19:35:48,199 INFO L137 encePairwiseOnDemand]: 143/146 looper letters, 150 selfloop transitions, 8 changer transitions 0/241 dead transitions. [2022-11-18 19:35:48,199 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 241 transitions, 1875 flow [2022-11-18 19:35:48,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 19:35:48,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-18 19:35:48,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 484 transitions. [2022-11-18 19:35:48,202 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8287671232876712 [2022-11-18 19:35:48,203 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 484 transitions. [2022-11-18 19:35:48,203 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 484 transitions. [2022-11-18 19:35:48,204 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:35:48,204 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 484 transitions. [2022-11-18 19:35:48,206 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 121.0) internal successors, (484), 4 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:35:48,208 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 146.0) internal successors, (730), 5 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:35:48,209 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 146.0) internal successors, (730), 5 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:35:48,209 INFO L175 Difference]: Start difference. First operand has 136 places, 207 transitions, 1361 flow. Second operand 4 states and 484 transitions. [2022-11-18 19:35:48,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 241 transitions, 1875 flow [2022-11-18 19:35:49,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 241 transitions, 1731 flow, removed 72 selfloop flow, removed 0 redundant places. [2022-11-18 19:35:49,418 INFO L231 Difference]: Finished difference. Result has 137 places, 183 transitions, 1029 flow [2022-11-18 19:35:49,419 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=1013, PETRI_DIFFERENCE_MINUEND_PLACES=134, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=183, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1029, PETRI_PLACES=137, PETRI_TRANSITIONS=183} [2022-11-18 19:35:49,419 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, 14 predicate places. [2022-11-18 19:35:49,420 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 183 transitions, 1029 flow [2022-11-18 19:35:49,420 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 109.5) internal successors, (438), 4 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) [2022-11-18 19:35:49,420 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:35:49,421 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:35:49,427 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c479c2f-969a-4ade-a34d-6ac90882bcf5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2022-11-18 19:35:49,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c479c2f-969a-4ade-a34d-6ac90882bcf5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:35:49,627 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-18 19:35:49,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:35:49,627 INFO L85 PathProgramCache]: Analyzing trace with hash 1707777112, now seen corresponding path program 1 times [2022-11-18 19:35:49,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:35:49,628 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [732446766] [2022-11-18 19:35:49,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:35:49,628 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:35:49,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:35:49,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:35:49,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:35:49,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [732446766] [2022-11-18 19:35:49,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [732446766] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:35:49,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14037696] [2022-11-18 19:35:49,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:35:49,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:35:49,797 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c479c2f-969a-4ade-a34d-6ac90882bcf5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:35:49,813 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c479c2f-969a-4ade-a34d-6ac90882bcf5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:35:49,947 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c479c2f-969a-4ade-a34d-6ac90882bcf5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 19:35:50,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:35:50,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 19:35:50,034 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:35:50,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:35:50,096 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 19:35:50,097 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14037696] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:35:50,099 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 19:35:50,099 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 4 [2022-11-18 19:35:50,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711332409] [2022-11-18 19:35:50,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:35:50,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 19:35:50,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:35:50,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 19:35:50,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2022-11-18 19:35:50,102 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 146 [2022-11-18 19:35:50,104 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 183 transitions, 1029 flow. Second operand has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:35:50,104 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:35:50,105 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 146 [2022-11-18 19:35:50,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:35:53,450 INFO L130 PetriNetUnfolder]: 12664/23220 cut-off events. [2022-11-18 19:35:53,450 INFO L131 PetriNetUnfolder]: For 64652/64764 co-relation queries the response was YES. [2022-11-18 19:35:53,523 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103579 conditions, 23220 events. 12664/23220 cut-off events. For 64652/64764 co-relation queries the response was YES. Maximal size of possible extension queue 1902. Compared 212867 event pairs, 1496 based on Foata normal form. 2697/17819 useless extension candidates. Maximal degree in co-relation 84640. Up to 12151 conditions per place. [2022-11-18 19:35:53,703 INFO L137 encePairwiseOnDemand]: 128/146 looper letters, 59 selfloop transitions, 54 changer transitions 0/198 dead transitions. [2022-11-18 19:35:53,703 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 198 transitions, 1441 flow [2022-11-18 19:35:53,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 19:35:53,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-18 19:35:53,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 484 transitions. [2022-11-18 19:35:53,706 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8287671232876712 [2022-11-18 19:35:53,706 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 484 transitions. [2022-11-18 19:35:53,706 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 484 transitions. [2022-11-18 19:35:53,707 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:35:53,707 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 484 transitions. [2022-11-18 19:35:53,709 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 121.0) internal successors, (484), 4 states have internal predecessors, (484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:35:53,710 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 146.0) internal successors, (730), 5 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:35:53,711 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 146.0) internal successors, (730), 5 states have internal predecessors, (730), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:35:53,711 INFO L175 Difference]: Start difference. First operand has 137 places, 183 transitions, 1029 flow. Second operand 4 states and 484 transitions. [2022-11-18 19:35:53,711 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 198 transitions, 1441 flow [2022-11-18 19:35:53,863 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 198 transitions, 1391 flow, removed 20 selfloop flow, removed 3 redundant places. [2022-11-18 19:35:53,866 INFO L231 Difference]: Finished difference. Result has 136 places, 192 transitions, 1417 flow [2022-11-18 19:35:53,866 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=856, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=164, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=110, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1417, PETRI_PLACES=136, PETRI_TRANSITIONS=192} [2022-11-18 19:35:53,867 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, 13 predicate places. [2022-11-18 19:35:53,867 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 192 transitions, 1417 flow [2022-11-18 19:35:53,867 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 110.0) internal successors, (440), 4 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:35:53,867 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:35:53,868 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:35:53,876 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c479c2f-969a-4ade-a34d-6ac90882bcf5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 19:35:54,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c479c2f-969a-4ade-a34d-6ac90882bcf5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:35:54,070 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-18 19:35:54,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:35:54,070 INFO L85 PathProgramCache]: Analyzing trace with hash -1296138837, now seen corresponding path program 2 times [2022-11-18 19:35:54,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:35:54,071 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1247388421] [2022-11-18 19:35:54,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:35:54,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:35:54,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:35:54,242 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:35:54,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:35:54,242 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1247388421] [2022-11-18 19:35:54,243 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1247388421] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:35:54,243 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21757779] [2022-11-18 19:35:54,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:35:54,244 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:35:54,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c479c2f-969a-4ade-a34d-6ac90882bcf5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:35:54,245 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c479c2f-969a-4ade-a34d-6ac90882bcf5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:35:54,276 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c479c2f-969a-4ade-a34d-6ac90882bcf5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 19:35:54,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 19:35:54,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:35:54,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 5 conjunts are in the unsatisfiable core [2022-11-18 19:35:54,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:35:54,422 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-18 19:35:54,422 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:35:54,519 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2022-11-18 19:35:54,519 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21757779] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:35:54,519 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:35:54,519 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 4, 4] total 9 [2022-11-18 19:35:54,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708802995] [2022-11-18 19:35:54,520 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:35:54,520 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 19:35:54,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:35:54,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 19:35:54,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=58, Unknown=0, NotChecked=0, Total=90 [2022-11-18 19:35:54,523 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 102 out of 146 [2022-11-18 19:35:54,524 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 192 transitions, 1417 flow. Second operand has 10 states, 10 states have (on average 104.9) internal successors, (1049), 10 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:35:54,525 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:35:54,525 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 102 of 146 [2022-11-18 19:35:54,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:36:01,763 INFO L130 PetriNetUnfolder]: 28558/47842 cut-off events. [2022-11-18 19:36:01,764 INFO L131 PetriNetUnfolder]: For 120038/120346 co-relation queries the response was YES. [2022-11-18 19:36:01,957 INFO L83 FinitePrefix]: Finished finitePrefix Result has 236096 conditions, 47842 events. 28558/47842 cut-off events. For 120038/120346 co-relation queries the response was YES. Maximal size of possible extension queue 3005. Compared 426847 event pairs, 6360 based on Foata normal form. 754/28971 useless extension candidates. Maximal degree in co-relation 200373. Up to 23699 conditions per place. [2022-11-18 19:36:02,315 INFO L137 encePairwiseOnDemand]: 139/146 looper letters, 431 selfloop transitions, 48 changer transitions 0/556 dead transitions. [2022-11-18 19:36:02,315 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 556 transitions, 5965 flow [2022-11-18 19:36:02,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 19:36:02,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-18 19:36:02,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 1182 transitions. [2022-11-18 19:36:02,320 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8095890410958904 [2022-11-18 19:36:02,321 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 1182 transitions. [2022-11-18 19:36:02,321 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 1182 transitions. [2022-11-18 19:36:02,322 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:36:02,322 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 1182 transitions. [2022-11-18 19:36:02,326 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 118.2) internal successors, (1182), 10 states have internal predecessors, (1182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:36:02,329 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 146.0) internal successors, (1606), 11 states have internal predecessors, (1606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:36:02,330 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 146.0) internal successors, (1606), 11 states have internal predecessors, (1606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:36:02,330 INFO L175 Difference]: Start difference. First operand has 136 places, 192 transitions, 1417 flow. Second operand 10 states and 1182 transitions. [2022-11-18 19:36:02,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 556 transitions, 5965 flow [2022-11-18 19:36:04,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 556 transitions, 5224 flow, removed 344 selfloop flow, removed 5 redundant places. [2022-11-18 19:36:04,019 INFO L231 Difference]: Finished difference. Result has 140 places, 193 transitions, 1302 flow [2022-11-18 19:36:04,019 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=1119, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=185, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1302, PETRI_PLACES=140, PETRI_TRANSITIONS=193} [2022-11-18 19:36:04,020 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, 17 predicate places. [2022-11-18 19:36:04,020 INFO L495 AbstractCegarLoop]: Abstraction has has 140 places, 193 transitions, 1302 flow [2022-11-18 19:36:04,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 104.9) internal successors, (1049), 10 states have internal predecessors, (1049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:36:04,021 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:36:04,021 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:36:04,032 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c479c2f-969a-4ade-a34d-6ac90882bcf5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 19:36:04,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c479c2f-969a-4ade-a34d-6ac90882bcf5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:36:04,232 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err2ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-18 19:36:04,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:36:04,233 INFO L85 PathProgramCache]: Analyzing trace with hash -769932521, now seen corresponding path program 1 times [2022-11-18 19:36:04,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:36:04,233 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960252600] [2022-11-18 19:36:04,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:36:04,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:36:04,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:36:04,321 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:36:04,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:36:04,322 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960252600] [2022-11-18 19:36:04,324 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [960252600] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 19:36:04,324 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 19:36:04,324 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-18 19:36:04,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1316279364] [2022-11-18 19:36:04,324 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 19:36:04,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 19:36:04,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:36:04,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 19:36:04,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 19:36:04,328 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 108 out of 146 [2022-11-18 19:36:04,329 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 140 places, 193 transitions, 1302 flow. Second operand has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:36:04,329 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:36:04,329 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 108 of 146 [2022-11-18 19:36:04,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 19:36:13,081 INFO L130 PetriNetUnfolder]: 38433/65786 cut-off events. [2022-11-18 19:36:13,081 INFO L131 PetriNetUnfolder]: For 135304/136077 co-relation queries the response was YES. [2022-11-18 19:36:13,339 INFO L83 FinitePrefix]: Finished finitePrefix Result has 272869 conditions, 65786 events. 38433/65786 cut-off events. For 135304/136077 co-relation queries the response was YES. Maximal size of possible extension queue 4611. Compared 644036 event pairs, 10146 based on Foata normal form. 66/43446 useless extension candidates. Maximal degree in co-relation 241066. Up to 34182 conditions per place. [2022-11-18 19:36:13,947 INFO L137 encePairwiseOnDemand]: 142/146 looper letters, 198 selfloop transitions, 5 changer transitions 0/287 dead transitions. [2022-11-18 19:36:13,947 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 287 transitions, 2681 flow [2022-11-18 19:36:13,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 19:36:13,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 19:36:13,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 369 transitions. [2022-11-18 19:36:13,950 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8424657534246576 [2022-11-18 19:36:13,950 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 369 transitions. [2022-11-18 19:36:13,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 369 transitions. [2022-11-18 19:36:13,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 19:36:13,950 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 369 transitions. [2022-11-18 19:36:13,951 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 123.0) internal successors, (369), 3 states have internal predecessors, (369), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:36:13,952 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:36:13,953 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 146.0) internal successors, (584), 4 states have internal predecessors, (584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:36:13,953 INFO L175 Difference]: Start difference. First operand has 140 places, 193 transitions, 1302 flow. Second operand 3 states and 369 transitions. [2022-11-18 19:36:13,953 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 287 transitions, 2681 flow [2022-11-18 19:36:15,687 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 287 transitions, 2506 flow, removed 28 selfloop flow, removed 7 redundant places. [2022-11-18 19:36:15,691 INFO L231 Difference]: Finished difference. Result has 136 places, 197 transitions, 1288 flow [2022-11-18 19:36:15,691 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=146, PETRI_DIFFERENCE_MINUEND_FLOW=1211, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=193, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=188, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1288, PETRI_PLACES=136, PETRI_TRANSITIONS=197} [2022-11-18 19:36:15,692 INFO L288 CegarLoopForPetriNet]: 123 programPoint places, 13 predicate places. [2022-11-18 19:36:15,692 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 197 transitions, 1288 flow [2022-11-18 19:36:15,693 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 110.0) internal successors, (330), 3 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:36:15,693 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 19:36:15,693 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 19:36:15,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-18 19:36:15,694 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW === [thread1Err0ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err1ASSERT_VIOLATIONINTEGER_OVERFLOW, thread1Err2ASSERT_VIOLATIONINTEGER_OVERFLOW (and 33 more)] === [2022-11-18 19:36:15,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 19:36:15,694 INFO L85 PathProgramCache]: Analyzing trace with hash -1296138839, now seen corresponding path program 2 times [2022-11-18 19:36:15,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 19:36:15,694 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357721758] [2022-11-18 19:36:15,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 19:36:15,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 19:36:15,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 19:36:15,828 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:36:15,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 19:36:15,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357721758] [2022-11-18 19:36:15,829 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357721758] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 19:36:15,829 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100634312] [2022-11-18 19:36:15,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 19:36:15,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 19:36:15,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c479c2f-969a-4ade-a34d-6ac90882bcf5/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 19:36:15,831 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c479c2f-969a-4ade-a34d-6ac90882bcf5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 19:36:15,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7c479c2f-969a-4ade-a34d-6ac90882bcf5/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 19:36:15,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 19:36:15,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 19:36:15,933 INFO L263 TraceCheckSpWp]: Trace formula consists of 172 conjuncts, 7 conjunts are in the unsatisfiable core [2022-11-18 19:36:15,935 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 19:36:16,025 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:36:16,025 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 19:36:16,154 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 19:36:16,154 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2100634312] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 19:36:16,154 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 19:36:16,154 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2022-11-18 19:36:16,155 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819728417] [2022-11-18 19:36:16,155 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 19:36:16,155 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2022-11-18 19:36:16,155 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 19:36:16,156 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2022-11-18 19:36:16,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=78, Unknown=0, NotChecked=0, Total=156 [2022-11-18 19:36:16,158 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 109 out of 146 [2022-11-18 19:36:16,161 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 197 transitions, 1288 flow. Second operand has 13 states, 13 states have (on average 110.3076923076923) internal successors, (1434), 13 states have internal predecessors, (1434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 19:36:16,161 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 19:36:16,161 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 109 of 146 [2022-11-18 19:36:16,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand