./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/weaver/test-easy11.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version e04fb08f Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/config/AutomizerReach.xml -i ../../sv-benchmarks/c/weaver/test-easy11.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8 --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash a686a41ee4cc6bbffea13719827ccaf379a83824b0020cd9f2e7eecebabb9242 --- 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-e04fb08 [2022-11-16 12:02:10,945 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-16 12:02:10,948 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-16 12:02:10,990 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-16 12:02:10,990 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-16 12:02:10,992 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-16 12:02:10,993 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-16 12:02:10,995 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-16 12:02:10,997 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-16 12:02:10,998 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-16 12:02:10,999 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-16 12:02:11,000 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-16 12:02:11,001 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-16 12:02:11,002 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-16 12:02:11,003 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-16 12:02:11,004 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-16 12:02:11,005 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-16 12:02:11,006 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-16 12:02:11,008 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-16 12:02:11,011 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-16 12:02:11,013 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-16 12:02:11,014 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-16 12:02:11,016 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-16 12:02:11,017 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-16 12:02:11,021 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-16 12:02:11,021 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-16 12:02:11,022 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-16 12:02:11,023 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-16 12:02:11,023 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-16 12:02:11,025 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-16 12:02:11,025 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-16 12:02:11,026 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-16 12:02:11,027 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-16 12:02:11,028 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-16 12:02:11,029 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-16 12:02:11,030 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-16 12:02:11,031 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-16 12:02:11,031 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-16 12:02:11,032 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-16 12:02:11,033 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-16 12:02:11,034 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-16 12:02:11,035 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-16 12:02:11,057 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-16 12:02:11,057 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-16 12:02:11,058 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-16 12:02:11,058 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-16 12:02:11,059 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-16 12:02:11,059 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-16 12:02:11,060 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-16 12:02:11,060 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-16 12:02:11,061 INFO L138 SettingsManager]: * Use SBE=true [2022-11-16 12:02:11,061 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-16 12:02:11,061 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-16 12:02:11,062 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-16 12:02:11,062 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-16 12:02:11,062 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-16 12:02:11,062 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-16 12:02:11,063 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-16 12:02:11,063 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-16 12:02:11,063 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-16 12:02:11,064 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-16 12:02:11,064 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-16 12:02:11,064 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-16 12:02:11,064 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-16 12:02:11,065 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-16 12:02:11,065 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-16 12:02:11,065 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:02:11,066 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-16 12:02:11,066 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-16 12:02:11,066 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-16 12:02:11,066 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-16 12:02:11,067 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-16 12:02:11,067 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-16 12:02:11,067 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-16 12:02:11,068 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-16 12:02:11,068 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_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a686a41ee4cc6bbffea13719827ccaf379a83824b0020cd9f2e7eecebabb9242 [2022-11-16 12:02:11,328 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-16 12:02:11,361 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-16 12:02:11,364 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-16 12:02:11,365 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-16 12:02:11,366 INFO L275 PluginConnector]: CDTParser initialized [2022-11-16 12:02:11,367 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/../../sv-benchmarks/c/weaver/test-easy11.wvr.c [2022-11-16 12:02:11,452 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/data/166272022/63628b24ca9b4d8ca67cd96895d7c3e2/FLAG172265fd1 [2022-11-16 12:02:12,011 INFO L306 CDTParser]: Found 1 translation units. [2022-11-16 12:02:12,011 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/sv-benchmarks/c/weaver/test-easy11.wvr.c [2022-11-16 12:02:12,021 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/data/166272022/63628b24ca9b4d8ca67cd96895d7c3e2/FLAG172265fd1 [2022-11-16 12:02:12,354 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/data/166272022/63628b24ca9b4d8ca67cd96895d7c3e2 [2022-11-16 12:02:12,358 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-16 12:02:12,361 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-16 12:02:12,364 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-16 12:02:12,364 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-16 12:02:12,368 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-16 12:02:12,368 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:02:12" (1/1) ... [2022-11-16 12:02:12,370 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@559f4ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:12, skipping insertion in model container [2022-11-16 12:02:12,370 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 16.11 12:02:12" (1/1) ... [2022-11-16 12:02:12,378 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-16 12:02:12,401 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-16 12:02:12,607 WARN L229 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_bd49a846-aec7-408c-9064-05f4e5b8c1c1/sv-benchmarks/c/weaver/test-easy11.wvr.c[2005,2018] [2022-11-16 12:02:12,610 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:02:12,622 INFO L203 MainTranslator]: Completed pre-run [2022-11-16 12:02:12,666 WARN L229 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_bd49a846-aec7-408c-9064-05f4e5b8c1c1/sv-benchmarks/c/weaver/test-easy11.wvr.c[2005,2018] [2022-11-16 12:02:12,667 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-16 12:02:12,687 INFO L208 MainTranslator]: Completed translation [2022-11-16 12:02:12,688 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:12 WrapperNode [2022-11-16 12:02:12,689 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-16 12:02:12,690 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-16 12:02:12,690 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-16 12:02:12,690 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-16 12:02:12,698 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:12" (1/1) ... [2022-11-16 12:02:12,708 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:12" (1/1) ... [2022-11-16 12:02:12,736 INFO L138 Inliner]: procedures = 21, calls = 24, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 53 [2022-11-16 12:02:12,736 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-16 12:02:12,737 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-16 12:02:12,737 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-16 12:02:12,738 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-16 12:02:12,747 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:12" (1/1) ... [2022-11-16 12:02:12,747 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:12" (1/1) ... [2022-11-16 12:02:12,753 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:12" (1/1) ... [2022-11-16 12:02:12,759 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:12" (1/1) ... [2022-11-16 12:02:12,763 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:12" (1/1) ... [2022-11-16 12:02:12,767 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:12" (1/1) ... [2022-11-16 12:02:12,768 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:12" (1/1) ... [2022-11-16 12:02:12,769 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:12" (1/1) ... [2022-11-16 12:02:12,771 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-16 12:02:12,772 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-16 12:02:12,773 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-16 12:02:12,773 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-16 12:02:12,774 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:12" (1/1) ... [2022-11-16 12:02:12,781 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-16 12:02:12,793 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:02:12,809 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-16 12:02:12,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-16 12:02:12,858 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-16 12:02:12,859 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2022-11-16 12:02:12,859 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2022-11-16 12:02:12,859 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2022-11-16 12:02:12,859 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2022-11-16 12:02:12,859 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-16 12:02:12,859 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-16 12:02:12,860 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-16 12:02:12,860 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-16 12:02:12,860 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-16 12:02:12,860 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-16 12:02:12,860 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-16 12:02:12,861 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-16 12:02:12,861 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-16 12:02:12,862 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-16 12:02:12,962 INFO L235 CfgBuilder]: Building ICFG [2022-11-16 12:02:12,964 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-16 12:02:13,146 INFO L276 CfgBuilder]: Performing block encoding [2022-11-16 12:02:13,153 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-16 12:02:13,154 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-16 12:02:13,156 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:02:13 BoogieIcfgContainer [2022-11-16 12:02:13,157 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-16 12:02:13,159 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-16 12:02:13,159 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-16 12:02:13,186 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-16 12:02:13,186 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 16.11 12:02:12" (1/3) ... [2022-11-16 12:02:13,187 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e7e805d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:02:13, skipping insertion in model container [2022-11-16 12:02:13,187 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 16.11 12:02:12" (2/3) ... [2022-11-16 12:02:13,188 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5e7e805d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 16.11 12:02:13, skipping insertion in model container [2022-11-16 12:02:13,188 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 16.11 12:02:13" (3/3) ... [2022-11-16 12:02:13,189 INFO L112 eAbstractionObserver]: Analyzing ICFG test-easy11.wvr.c [2022-11-16 12:02:13,215 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-16 12:02:13,226 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-16 12:02:13,227 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-16 12:02:13,227 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-16 12:02:13,360 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-16 12:02:13,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 87 transitions, 190 flow [2022-11-16 12:02:13,522 INFO L130 PetriNetUnfolder]: 6/85 cut-off events. [2022-11-16 12:02:13,522 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 12:02:13,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 85 events. 6/85 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 54 event pairs, 0 based on Foata normal form. 0/78 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2022-11-16 12:02:13,533 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 87 transitions, 190 flow [2022-11-16 12:02:13,539 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 76 transitions, 164 flow [2022-11-16 12:02:13,558 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-16 12:02:13,568 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;@6dd6991c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-16 12:02:13,568 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-16 12:02:13,620 INFO L130 PetriNetUnfolder]: 6/75 cut-off events. [2022-11-16 12:02:13,620 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-16 12:02:13,620 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:02:13,621 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, 1, 1, 1, 1, 1] [2022-11-16 12:02:13,623 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:02:13,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:13,631 INFO L85 PathProgramCache]: Analyzing trace with hash -384738625, now seen corresponding path program 1 times [2022-11-16 12:02:13,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:13,642 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379240660] [2022-11-16 12:02:13,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:13,644 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:13,876 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:14,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:14,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:14,036 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379240660] [2022-11-16 12:02:14,037 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379240660] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:02:14,037 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:02:14,037 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2022-11-16 12:02:14,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407510018] [2022-11-16 12:02:14,040 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:02:14,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2022-11-16 12:02:14,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:14,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2022-11-16 12:02:14,084 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2022-11-16 12:02:14,088 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 78 out of 87 [2022-11-16 12:02:14,091 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 76 transitions, 164 flow. Second operand has 2 states, 2 states have (on average 81.0) internal successors, (162), 2 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:14,091 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:02:14,091 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 78 of 87 [2022-11-16 12:02:14,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:02:14,157 INFO L130 PetriNetUnfolder]: 2/72 cut-off events. [2022-11-16 12:02:14,157 INFO L131 PetriNetUnfolder]: For 8/8 co-relation queries the response was YES. [2022-11-16 12:02:14,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86 conditions, 72 events. 2/72 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 49 event pairs, 0 based on Foata normal form. 6/74 useless extension candidates. Maximal degree in co-relation 48. Up to 5 conditions per place. [2022-11-16 12:02:14,160 INFO L137 encePairwiseOnDemand]: 83/87 looper letters, 4 selfloop transitions, 0 changer transitions 2/72 dead transitions. [2022-11-16 12:02:14,160 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 72 transitions, 164 flow [2022-11-16 12:02:14,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2022-11-16 12:02:14,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 2 states. [2022-11-16 12:02:14,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2 states to 2 states and 164 transitions. [2022-11-16 12:02:14,175 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9425287356321839 [2022-11-16 12:02:14,176 INFO L72 ComplementDD]: Start complementDD. Operand 2 states and 164 transitions. [2022-11-16 12:02:14,176 INFO L73 IsDeterministic]: Start isDeterministic. Operand 2 states and 164 transitions. [2022-11-16 12:02:14,178 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:02:14,180 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 2 states and 164 transitions. [2022-11-16 12:02:14,183 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 3 states, 2 states have (on average 82.0) internal successors, (164), 2 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:14,188 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:14,188 INFO L81 ComplementDD]: Finished complementDD. Result has 3 states, 3 states have (on average 87.0) internal successors, (261), 3 states have internal predecessors, (261), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:14,190 INFO L175 Difference]: Start difference. First operand has 77 places, 76 transitions, 164 flow. Second operand 2 states and 164 transitions. [2022-11-16 12:02:14,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 72 transitions, 164 flow [2022-11-16 12:02:14,195 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 72 transitions, 156 flow, removed 0 selfloop flow, removed 4 redundant places. [2022-11-16 12:02:14,198 INFO L231 Difference]: Finished difference. Result has 74 places, 70 transitions, 144 flow [2022-11-16 12:02:14,200 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=2, PETRI_FLOW=144, PETRI_PLACES=74, PETRI_TRANSITIONS=70} [2022-11-16 12:02:14,204 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, -3 predicate places. [2022-11-16 12:02:14,204 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 70 transitions, 144 flow [2022-11-16 12:02:14,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 81.0) internal successors, (162), 2 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:14,205 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:02:14,205 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, 1, 1, 1, 1, 1] [2022-11-16 12:02:14,205 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-16 12:02:14,206 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:02:14,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:14,206 INFO L85 PathProgramCache]: Analyzing trace with hash 1457758209, now seen corresponding path program 1 times [2022-11-16 12:02:14,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:14,207 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067586717] [2022-11-16 12:02:14,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:14,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:14,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:15,166 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:15,166 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:15,167 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067586717] [2022-11-16 12:02:15,167 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067586717] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:02:15,167 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:02:15,168 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-16 12:02:15,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037237792] [2022-11-16 12:02:15,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:02:15,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 12:02:15,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:15,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 12:02:15,178 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:02:15,182 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-16 12:02:15,184 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 70 transitions, 144 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:15,185 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:02:15,185 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-16 12:02:15,190 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:02:15,746 INFO L130 PetriNetUnfolder]: 106/357 cut-off events. [2022-11-16 12:02:15,746 INFO L131 PetriNetUnfolder]: For 22/28 co-relation queries the response was YES. [2022-11-16 12:02:15,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 601 conditions, 357 events. 106/357 cut-off events. For 22/28 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1669 event pairs, 21 based on Foata normal form. 3/325 useless extension candidates. Maximal degree in co-relation 598. Up to 57 conditions per place. [2022-11-16 12:02:15,750 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 60 selfloop transitions, 16 changer transitions 8/125 dead transitions. [2022-11-16 12:02:15,750 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 125 transitions, 431 flow [2022-11-16 12:02:15,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 12:02:15,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-16 12:02:15,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 799 transitions. [2022-11-16 12:02:15,757 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6559934318555009 [2022-11-16 12:02:15,757 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 799 transitions. [2022-11-16 12:02:15,757 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 799 transitions. [2022-11-16 12:02:15,759 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:02:15,759 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 799 transitions. [2022-11-16 12:02:15,763 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 57.07142857142857) internal successors, (799), 14 states have internal predecessors, (799), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:15,767 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:15,768 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:15,768 INFO L175 Difference]: Start difference. First operand has 74 places, 70 transitions, 144 flow. Second operand 14 states and 799 transitions. [2022-11-16 12:02:15,769 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 125 transitions, 431 flow [2022-11-16 12:02:15,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 125 transitions, 431 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-16 12:02:15,772 INFO L231 Difference]: Finished difference. Result has 92 places, 82 transitions, 241 flow [2022-11-16 12:02:15,773 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=144, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=241, PETRI_PLACES=92, PETRI_TRANSITIONS=82} [2022-11-16 12:02:15,774 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 15 predicate places. [2022-11-16 12:02:15,774 INFO L495 AbstractCegarLoop]: Abstraction has has 92 places, 82 transitions, 241 flow [2022-11-16 12:02:15,775 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:15,775 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:02:15,775 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, 1, 1, 1, 1, 1] [2022-11-16 12:02:15,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-16 12:02:15,776 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:02:15,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:15,776 INFO L85 PathProgramCache]: Analyzing trace with hash -1980240921, now seen corresponding path program 2 times [2022-11-16 12:02:15,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:15,777 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994137278] [2022-11-16 12:02:15,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:15,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:15,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:16,209 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:16,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:16,210 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994137278] [2022-11-16 12:02:16,210 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994137278] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:02:16,210 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:02:16,210 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-16 12:02:16,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481383779] [2022-11-16 12:02:16,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:02:16,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 12:02:16,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:16,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 12:02:16,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:02:16,214 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-16 12:02:16,216 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 82 transitions, 241 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:16,216 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:02:16,216 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-16 12:02:16,216 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:02:16,683 INFO L130 PetriNetUnfolder]: 111/370 cut-off events. [2022-11-16 12:02:16,683 INFO L131 PetriNetUnfolder]: For 151/151 co-relation queries the response was YES. [2022-11-16 12:02:16,685 INFO L83 FinitePrefix]: Finished finitePrefix Result has 823 conditions, 370 events. 111/370 cut-off events. For 151/151 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 1727 event pairs, 31 based on Foata normal form. 1/366 useless extension candidates. Maximal degree in co-relation 812. Up to 98 conditions per place. [2022-11-16 12:02:16,688 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 54 selfloop transitions, 18 changer transitions 8/121 dead transitions. [2022-11-16 12:02:16,688 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 121 transitions, 526 flow [2022-11-16 12:02:16,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 12:02:16,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-16 12:02:16,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 792 transitions. [2022-11-16 12:02:16,691 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6502463054187192 [2022-11-16 12:02:16,691 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 792 transitions. [2022-11-16 12:02:16,691 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 792 transitions. [2022-11-16 12:02:16,692 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:02:16,692 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 792 transitions. [2022-11-16 12:02:16,694 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.57142857142857) internal successors, (792), 14 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:16,697 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:16,698 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:16,698 INFO L175 Difference]: Start difference. First operand has 92 places, 82 transitions, 241 flow. Second operand 14 states and 792 transitions. [2022-11-16 12:02:16,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 121 transitions, 526 flow [2022-11-16 12:02:16,702 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 95 places, 121 transitions, 510 flow, removed 5 selfloop flow, removed 6 redundant places. [2022-11-16 12:02:16,704 INFO L231 Difference]: Finished difference. Result has 101 places, 87 transitions, 309 flow [2022-11-16 12:02:16,704 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=229, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=309, PETRI_PLACES=101, PETRI_TRANSITIONS=87} [2022-11-16 12:02:16,705 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 24 predicate places. [2022-11-16 12:02:16,705 INFO L495 AbstractCegarLoop]: Abstraction has has 101 places, 87 transitions, 309 flow [2022-11-16 12:02:16,706 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:16,706 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:02:16,707 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, 1, 1, 1, 1, 1] [2022-11-16 12:02:16,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-16 12:02:16,707 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:02:16,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:16,708 INFO L85 PathProgramCache]: Analyzing trace with hash 1386736289, now seen corresponding path program 3 times [2022-11-16 12:02:16,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:16,708 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647640779] [2022-11-16 12:02:16,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:16,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:16,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:17,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:17,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:17,101 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647640779] [2022-11-16 12:02:17,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647640779] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:02:17,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:02:17,102 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-16 12:02:17,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1947604386] [2022-11-16 12:02:17,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:02:17,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 12:02:17,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:17,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 12:02:17,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:02:17,105 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-16 12:02:17,106 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 87 transitions, 309 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:17,106 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:02:17,106 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-16 12:02:17,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:02:17,674 INFO L130 PetriNetUnfolder]: 139/385 cut-off events. [2022-11-16 12:02:17,674 INFO L131 PetriNetUnfolder]: For 382/382 co-relation queries the response was YES. [2022-11-16 12:02:17,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1072 conditions, 385 events. 139/385 cut-off events. For 382/382 co-relation queries the response was YES. Maximal size of possible extension queue 29. Compared 1755 event pairs, 35 based on Foata normal form. 1/377 useless extension candidates. Maximal degree in co-relation 1057. Up to 107 conditions per place. [2022-11-16 12:02:17,680 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 53 selfloop transitions, 28 changer transitions 8/130 dead transitions. [2022-11-16 12:02:17,680 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 130 transitions, 684 flow [2022-11-16 12:02:17,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 12:02:17,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-16 12:02:17,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 794 transitions. [2022-11-16 12:02:17,683 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6518883415435139 [2022-11-16 12:02:17,684 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 794 transitions. [2022-11-16 12:02:17,684 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 794 transitions. [2022-11-16 12:02:17,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:02:17,685 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 794 transitions. [2022-11-16 12:02:17,687 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.714285714285715) internal successors, (794), 14 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:17,690 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:17,690 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:17,691 INFO L175 Difference]: Start difference. First operand has 101 places, 87 transitions, 309 flow. Second operand 14 states and 794 transitions. [2022-11-16 12:02:17,691 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 130 transitions, 684 flow [2022-11-16 12:02:17,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 130 transitions, 614 flow, removed 10 selfloop flow, removed 11 redundant places. [2022-11-16 12:02:17,707 INFO L231 Difference]: Finished difference. Result has 106 places, 98 transitions, 427 flow [2022-11-16 12:02:17,707 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=265, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=427, PETRI_PLACES=106, PETRI_TRANSITIONS=98} [2022-11-16 12:02:17,709 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 29 predicate places. [2022-11-16 12:02:17,711 INFO L495 AbstractCegarLoop]: Abstraction has has 106 places, 98 transitions, 427 flow [2022-11-16 12:02:17,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:17,713 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:02:17,713 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, 1, 1, 1, 1, 1] [2022-11-16 12:02:17,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-16 12:02:17,714 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:02:17,715 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:17,715 INFO L85 PathProgramCache]: Analyzing trace with hash -83195579, now seen corresponding path program 4 times [2022-11-16 12:02:17,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:17,717 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098697912] [2022-11-16 12:02:17,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:17,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:17,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:18,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:18,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:18,198 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098697912] [2022-11-16 12:02:18,199 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098697912] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:02:18,199 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:02:18,199 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-16 12:02:18,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211505303] [2022-11-16 12:02:18,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:02:18,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 12:02:18,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:18,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 12:02:18,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:02:18,202 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-16 12:02:18,202 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 98 transitions, 427 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:18,203 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:02:18,203 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-16 12:02:18,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:02:18,638 INFO L130 PetriNetUnfolder]: 162/417 cut-off events. [2022-11-16 12:02:18,638 INFO L131 PetriNetUnfolder]: For 637/637 co-relation queries the response was YES. [2022-11-16 12:02:18,640 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1340 conditions, 417 events. 162/417 cut-off events. For 637/637 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 1873 event pairs, 46 based on Foata normal form. 1/406 useless extension candidates. Maximal degree in co-relation 1322. Up to 121 conditions per place. [2022-11-16 12:02:18,643 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 61 selfloop transitions, 38 changer transitions 8/148 dead transitions. [2022-11-16 12:02:18,644 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 148 transitions, 919 flow [2022-11-16 12:02:18,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 12:02:18,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-16 12:02:18,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 790 transitions. [2022-11-16 12:02:18,647 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6486042692939245 [2022-11-16 12:02:18,647 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 790 transitions. [2022-11-16 12:02:18,647 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 790 transitions. [2022-11-16 12:02:18,648 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:02:18,648 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 790 transitions. [2022-11-16 12:02:18,650 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.42857142857143) internal successors, (790), 14 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:18,653 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:18,654 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:18,654 INFO L175 Difference]: Start difference. First operand has 106 places, 98 transitions, 427 flow. Second operand 14 states and 790 transitions. [2022-11-16 12:02:18,654 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 148 transitions, 919 flow [2022-11-16 12:02:18,660 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 148 transitions, 842 flow, removed 15 selfloop flow, removed 9 redundant places. [2022-11-16 12:02:18,663 INFO L231 Difference]: Finished difference. Result has 114 places, 114 transitions, 631 flow [2022-11-16 12:02:18,663 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=382, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=631, PETRI_PLACES=114, PETRI_TRANSITIONS=114} [2022-11-16 12:02:18,664 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 37 predicate places. [2022-11-16 12:02:18,664 INFO L495 AbstractCegarLoop]: Abstraction has has 114 places, 114 transitions, 631 flow [2022-11-16 12:02:18,665 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:18,665 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:02:18,665 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, 1, 1, 1, 1, 1] [2022-11-16 12:02:18,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-16 12:02:18,666 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:02:18,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:18,667 INFO L85 PathProgramCache]: Analyzing trace with hash 89243755, now seen corresponding path program 5 times [2022-11-16 12:02:18,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:18,667 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1903988455] [2022-11-16 12:02:18,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:18,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:18,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:19,084 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:19,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:19,085 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1903988455] [2022-11-16 12:02:19,085 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1903988455] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:02:19,085 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:02:19,085 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-16 12:02:19,085 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [237832937] [2022-11-16 12:02:19,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:02:19,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 12:02:19,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:19,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 12:02:19,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:02:19,088 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-16 12:02:19,089 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 114 transitions, 631 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:19,090 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:02:19,090 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-16 12:02:19,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:02:19,481 INFO L130 PetriNetUnfolder]: 160/416 cut-off events. [2022-11-16 12:02:19,481 INFO L131 PetriNetUnfolder]: For 854/854 co-relation queries the response was YES. [2022-11-16 12:02:19,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1480 conditions, 416 events. 160/416 cut-off events. For 854/854 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1893 event pairs, 44 based on Foata normal form. 1/410 useless extension candidates. Maximal degree in co-relation 1458. Up to 120 conditions per place. [2022-11-16 12:02:19,486 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 64 selfloop transitions, 36 changer transitions 8/149 dead transitions. [2022-11-16 12:02:19,486 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 149 transitions, 1018 flow [2022-11-16 12:02:19,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 12:02:19,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-16 12:02:19,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 790 transitions. [2022-11-16 12:02:19,489 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6486042692939245 [2022-11-16 12:02:19,490 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 790 transitions. [2022-11-16 12:02:19,490 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 790 transitions. [2022-11-16 12:02:19,490 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:02:19,491 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 790 transitions. [2022-11-16 12:02:19,493 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.42857142857143) internal successors, (790), 14 states have internal predecessors, (790), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:19,495 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:19,496 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:19,496 INFO L175 Difference]: Start difference. First operand has 114 places, 114 transitions, 631 flow. Second operand 14 states and 790 transitions. [2022-11-16 12:02:19,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 149 transitions, 1018 flow [2022-11-16 12:02:19,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 149 transitions, 952 flow, removed 19 selfloop flow, removed 8 redundant places. [2022-11-16 12:02:19,507 INFO L231 Difference]: Finished difference. Result has 119 places, 112 transitions, 642 flow [2022-11-16 12:02:19,508 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=583, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=642, PETRI_PLACES=119, PETRI_TRANSITIONS=112} [2022-11-16 12:02:19,511 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 42 predicate places. [2022-11-16 12:02:19,511 INFO L495 AbstractCegarLoop]: Abstraction has has 119 places, 112 transitions, 642 flow [2022-11-16 12:02:19,511 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:19,512 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:02:19,512 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, 1, 1, 1, 1, 1] [2022-11-16 12:02:19,512 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-16 12:02:19,512 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:02:19,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:19,513 INFO L85 PathProgramCache]: Analyzing trace with hash 18414173, now seen corresponding path program 6 times [2022-11-16 12:02:19,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:19,513 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117139728] [2022-11-16 12:02:19,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:19,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:19,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:19,952 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:19,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:19,953 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117139728] [2022-11-16 12:02:19,953 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117139728] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:02:19,953 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:02:19,954 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [15] imperfect sequences [] total 15 [2022-11-16 12:02:19,958 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585551625] [2022-11-16 12:02:19,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:02:19,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2022-11-16 12:02:19,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:19,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2022-11-16 12:02:19,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2022-11-16 12:02:19,962 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-16 12:02:19,963 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 119 places, 112 transitions, 642 flow. Second operand has 15 states, 15 states have (on average 52.53333333333333) internal successors, (788), 15 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:19,964 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:02:19,964 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-16 12:02:19,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:02:20,469 INFO L130 PetriNetUnfolder]: 176/440 cut-off events. [2022-11-16 12:02:20,469 INFO L131 PetriNetUnfolder]: For 1154/1154 co-relation queries the response was YES. [2022-11-16 12:02:20,471 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1616 conditions, 440 events. 176/440 cut-off events. For 1154/1154 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 1990 event pairs, 45 based on Foata normal form. 1/429 useless extension candidates. Maximal degree in co-relation 1594. Up to 125 conditions per place. [2022-11-16 12:02:20,475 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 61 selfloop transitions, 42 changer transitions 7/151 dead transitions. [2022-11-16 12:02:20,475 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 126 places, 151 transitions, 1099 flow [2022-11-16 12:02:20,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 12:02:20,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-16 12:02:20,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 793 transitions. [2022-11-16 12:02:20,478 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6510673234811166 [2022-11-16 12:02:20,478 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 793 transitions. [2022-11-16 12:02:20,479 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 793 transitions. [2022-11-16 12:02:20,479 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:02:20,479 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 793 transitions. [2022-11-16 12:02:20,482 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.642857142857146) internal successors, (793), 14 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:20,485 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:20,486 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:20,486 INFO L175 Difference]: Start difference. First operand has 119 places, 112 transitions, 642 flow. Second operand 14 states and 793 transitions. [2022-11-16 12:02:20,486 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 126 places, 151 transitions, 1099 flow [2022-11-16 12:02:20,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 114 places, 151 transitions, 989 flow, removed 7 selfloop flow, removed 12 redundant places. [2022-11-16 12:02:20,497 INFO L231 Difference]: Finished difference. Result has 121 places, 121 transitions, 787 flow [2022-11-16 12:02:20,497 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=562, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=787, PETRI_PLACES=121, PETRI_TRANSITIONS=121} [2022-11-16 12:02:20,498 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 44 predicate places. [2022-11-16 12:02:20,498 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 121 transitions, 787 flow [2022-11-16 12:02:20,499 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 52.53333333333333) internal successors, (788), 15 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:20,499 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:02:20,499 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, 1, 1, 1, 1, 1] [2022-11-16 12:02:20,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-16 12:02:20,500 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:02:20,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:20,500 INFO L85 PathProgramCache]: Analyzing trace with hash -1247761689, now seen corresponding path program 7 times [2022-11-16 12:02:20,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:20,501 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670292833] [2022-11-16 12:02:20,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:20,501 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:20,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:20,865 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:20,865 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:20,866 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670292833] [2022-11-16 12:02:20,866 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670292833] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:02:20,866 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:02:20,866 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-16 12:02:20,866 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119399766] [2022-11-16 12:02:20,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:02:20,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 12:02:20,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:20,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 12:02:20,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:02:20,869 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-16 12:02:20,870 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 121 transitions, 787 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:20,870 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:02:20,870 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-16 12:02:20,871 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:02:21,230 INFO L130 PetriNetUnfolder]: 185/508 cut-off events. [2022-11-16 12:02:21,230 INFO L131 PetriNetUnfolder]: For 1502/1504 co-relation queries the response was YES. [2022-11-16 12:02:21,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1828 conditions, 508 events. 185/508 cut-off events. For 1502/1504 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2521 event pairs, 37 based on Foata normal form. 3/506 useless extension candidates. Maximal degree in co-relation 1803. Up to 132 conditions per place. [2022-11-16 12:02:21,236 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 70 selfloop transitions, 44 changer transitions 8/163 dead transitions. [2022-11-16 12:02:21,236 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 163 transitions, 1245 flow [2022-11-16 12:02:21,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 12:02:21,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-16 12:02:21,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 794 transitions. [2022-11-16 12:02:21,239 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6518883415435139 [2022-11-16 12:02:21,240 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 794 transitions. [2022-11-16 12:02:21,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 794 transitions. [2022-11-16 12:02:21,240 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:02:21,241 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 794 transitions. [2022-11-16 12:02:21,243 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.714285714285715) internal successors, (794), 14 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:21,245 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:21,246 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:21,246 INFO L175 Difference]: Start difference. First operand has 121 places, 121 transitions, 787 flow. Second operand 14 states and 794 transitions. [2022-11-16 12:02:21,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 163 transitions, 1245 flow [2022-11-16 12:02:21,253 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 163 transitions, 1169 flow, removed 13 selfloop flow, removed 9 redundant places. [2022-11-16 12:02:21,256 INFO L231 Difference]: Finished difference. Result has 126 places, 122 transitions, 833 flow [2022-11-16 12:02:21,257 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=725, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=833, PETRI_PLACES=126, PETRI_TRANSITIONS=122} [2022-11-16 12:02:21,257 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 49 predicate places. [2022-11-16 12:02:21,257 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 122 transitions, 833 flow [2022-11-16 12:02:21,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:21,258 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:02:21,258 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, 1, 1, 1, 1, 1] [2022-11-16 12:02:21,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-16 12:02:21,259 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:02:21,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:21,259 INFO L85 PathProgramCache]: Analyzing trace with hash -801684339, now seen corresponding path program 8 times [2022-11-16 12:02:21,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:21,260 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050237552] [2022-11-16 12:02:21,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:21,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:21,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:21,622 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:21,622 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:21,622 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050237552] [2022-11-16 12:02:21,622 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050237552] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:02:21,623 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:02:21,623 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-16 12:02:21,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668340517] [2022-11-16 12:02:21,623 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:02:21,623 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 12:02:21,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:21,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 12:02:21,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:02:21,625 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-16 12:02:21,626 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 122 transitions, 833 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:21,627 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:02:21,627 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-16 12:02:21,627 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:02:22,091 INFO L130 PetriNetUnfolder]: 183/504 cut-off events. [2022-11-16 12:02:22,091 INFO L131 PetriNetUnfolder]: For 1794/1796 co-relation queries the response was YES. [2022-11-16 12:02:22,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1872 conditions, 504 events. 183/504 cut-off events. For 1794/1796 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2478 event pairs, 34 based on Foata normal form. 3/499 useless extension candidates. Maximal degree in co-relation 1846. Up to 141 conditions per place. [2022-11-16 12:02:22,098 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 62 selfloop transitions, 44 changer transitions 8/155 dead transitions. [2022-11-16 12:02:22,098 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 155 transitions, 1223 flow [2022-11-16 12:02:22,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 12:02:22,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-16 12:02:22,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 795 transitions. [2022-11-16 12:02:22,103 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6527093596059114 [2022-11-16 12:02:22,103 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 795 transitions. [2022-11-16 12:02:22,103 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 795 transitions. [2022-11-16 12:02:22,105 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:02:22,105 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 795 transitions. [2022-11-16 12:02:22,108 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.785714285714285) internal successors, (795), 14 states have internal predecessors, (795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:22,111 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:22,112 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:22,112 INFO L175 Difference]: Start difference. First operand has 126 places, 122 transitions, 833 flow. Second operand 14 states and 795 transitions. [2022-11-16 12:02:22,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 155 transitions, 1223 flow [2022-11-16 12:02:22,121 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 123 places, 155 transitions, 1117 flow, removed 9 selfloop flow, removed 12 redundant places. [2022-11-16 12:02:22,126 INFO L231 Difference]: Finished difference. Result has 129 places, 124 transitions, 877 flow [2022-11-16 12:02:22,126 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=735, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=877, PETRI_PLACES=129, PETRI_TRANSITIONS=124} [2022-11-16 12:02:22,127 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 52 predicate places. [2022-11-16 12:02:22,127 INFO L495 AbstractCegarLoop]: Abstraction has has 129 places, 124 transitions, 877 flow [2022-11-16 12:02:22,128 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:22,128 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:02:22,128 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, 1, 1, 1, 1, 1] [2022-11-16 12:02:22,129 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2022-11-16 12:02:22,129 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:02:22,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:22,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1028934011, now seen corresponding path program 9 times [2022-11-16 12:02:22,130 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:22,130 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682924862] [2022-11-16 12:02:22,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:22,130 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:22,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:22,541 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:22,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:22,541 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682924862] [2022-11-16 12:02:22,541 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682924862] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:02:22,541 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:02:22,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-16 12:02:22,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709354195] [2022-11-16 12:02:22,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:02:22,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 12:02:22,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:22,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 12:02:22,543 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:02:22,544 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-16 12:02:22,545 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 124 transitions, 877 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:22,545 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:02:22,545 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-16 12:02:22,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:02:22,983 INFO L130 PetriNetUnfolder]: 181/497 cut-off events. [2022-11-16 12:02:22,984 INFO L131 PetriNetUnfolder]: For 1924/1926 co-relation queries the response was YES. [2022-11-16 12:02:22,987 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1883 conditions, 497 events. 181/497 cut-off events. For 1924/1926 co-relation queries the response was YES. Maximal size of possible extension queue 37. Compared 2426 event pairs, 36 based on Foata normal form. 3/492 useless extension candidates. Maximal degree in co-relation 1855. Up to 140 conditions per place. [2022-11-16 12:02:22,991 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 62 selfloop transitions, 42 changer transitions 8/153 dead transitions. [2022-11-16 12:02:22,991 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 153 transitions, 1217 flow [2022-11-16 12:02:22,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 12:02:22,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-16 12:02:22,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 791 transitions. [2022-11-16 12:02:22,994 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6494252873563219 [2022-11-16 12:02:22,994 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 791 transitions. [2022-11-16 12:02:22,994 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 791 transitions. [2022-11-16 12:02:22,995 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:02:22,995 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 791 transitions. [2022-11-16 12:02:22,997 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.5) internal successors, (791), 14 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:23,000 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:23,001 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:23,001 INFO L175 Difference]: Start difference. First operand has 129 places, 124 transitions, 877 flow. Second operand 14 states and 791 transitions. [2022-11-16 12:02:23,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 153 transitions, 1217 flow [2022-11-16 12:02:23,011 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 153 transitions, 1127 flow, removed 10 selfloop flow, removed 10 redundant places. [2022-11-16 12:02:23,014 INFO L231 Difference]: Finished difference. Result has 132 places, 122 transitions, 858 flow [2022-11-16 12:02:23,015 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=791, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=858, PETRI_PLACES=132, PETRI_TRANSITIONS=122} [2022-11-16 12:02:23,015 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 55 predicate places. [2022-11-16 12:02:23,016 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 122 transitions, 858 flow [2022-11-16 12:02:23,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:23,017 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:02:23,017 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, 1, 1, 1, 1, 1] [2022-11-16 12:02:23,017 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2022-11-16 12:02:23,017 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:02:23,018 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:23,018 INFO L85 PathProgramCache]: Analyzing trace with hash 2017390703, now seen corresponding path program 10 times [2022-11-16 12:02:23,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:23,018 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503583509] [2022-11-16 12:02:23,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:23,019 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:23,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:23,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:23,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:23,341 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503583509] [2022-11-16 12:02:23,341 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503583509] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:02:23,341 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:02:23,341 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-16 12:02:23,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734023089] [2022-11-16 12:02:23,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:02:23,342 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 12:02:23,342 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:23,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 12:02:23,342 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:02:23,343 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-16 12:02:23,344 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 122 transitions, 858 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:23,344 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:02:23,344 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-16 12:02:23,345 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:02:23,803 INFO L130 PetriNetUnfolder]: 177/472 cut-off events. [2022-11-16 12:02:23,803 INFO L131 PetriNetUnfolder]: For 1894/1894 co-relation queries the response was YES. [2022-11-16 12:02:23,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1830 conditions, 472 events. 177/472 cut-off events. For 1894/1894 co-relation queries the response was YES. Maximal size of possible extension queue 39. Compared 2328 event pairs, 44 based on Foata normal form. 1/462 useless extension candidates. Maximal degree in co-relation 1802. Up to 130 conditions per place. [2022-11-16 12:02:23,809 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 64 selfloop transitions, 44 changer transitions 7/156 dead transitions. [2022-11-16 12:02:23,810 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 156 transitions, 1226 flow [2022-11-16 12:02:23,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 12:02:23,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-16 12:02:23,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 794 transitions. [2022-11-16 12:02:23,812 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6518883415435139 [2022-11-16 12:02:23,812 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 794 transitions. [2022-11-16 12:02:23,813 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 794 transitions. [2022-11-16 12:02:23,813 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:02:23,813 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 794 transitions. [2022-11-16 12:02:23,815 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.714285714285715) internal successors, (794), 14 states have internal predecessors, (794), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:23,818 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:23,819 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:23,819 INFO L175 Difference]: Start difference. First operand has 132 places, 122 transitions, 858 flow. Second operand 14 states and 794 transitions. [2022-11-16 12:02:23,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 156 transitions, 1226 flow [2022-11-16 12:02:23,830 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 127 places, 156 transitions, 1126 flow, removed 8 selfloop flow, removed 12 redundant places. [2022-11-16 12:02:23,836 INFO L231 Difference]: Finished difference. Result has 132 places, 124 transitions, 880 flow [2022-11-16 12:02:23,837 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=766, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=880, PETRI_PLACES=132, PETRI_TRANSITIONS=124} [2022-11-16 12:02:23,837 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 55 predicate places. [2022-11-16 12:02:23,838 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 124 transitions, 880 flow [2022-11-16 12:02:23,838 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:23,838 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:02:23,839 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, 1, 1, 1, 1, 1] [2022-11-16 12:02:23,839 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2022-11-16 12:02:23,839 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:02:23,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:23,840 INFO L85 PathProgramCache]: Analyzing trace with hash -1352752699, now seen corresponding path program 11 times [2022-11-16 12:02:23,840 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:23,840 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [355274702] [2022-11-16 12:02:23,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:23,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:23,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:24,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:24,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:24,240 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [355274702] [2022-11-16 12:02:24,240 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [355274702] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:02:24,240 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:02:24,240 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-16 12:02:24,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1407739067] [2022-11-16 12:02:24,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:02:24,241 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 12:02:24,241 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:24,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 12:02:24,242 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:02:24,243 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-16 12:02:24,244 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 124 transitions, 880 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:24,244 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:02:24,244 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-16 12:02:24,244 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:02:24,750 INFO L130 PetriNetUnfolder]: 176/470 cut-off events. [2022-11-16 12:02:24,750 INFO L131 PetriNetUnfolder]: For 1909/1909 co-relation queries the response was YES. [2022-11-16 12:02:24,752 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1840 conditions, 470 events. 176/470 cut-off events. For 1909/1909 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 2306 event pairs, 43 based on Foata normal form. 1/460 useless extension candidates. Maximal degree in co-relation 1811. Up to 134 conditions per place. [2022-11-16 12:02:24,756 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 63 selfloop transitions, 40 changer transitions 8/152 dead transitions. [2022-11-16 12:02:24,756 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 152 transitions, 1216 flow [2022-11-16 12:02:24,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 12:02:24,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-16 12:02:24,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 792 transitions. [2022-11-16 12:02:24,758 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6502463054187192 [2022-11-16 12:02:24,759 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 792 transitions. [2022-11-16 12:02:24,759 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 792 transitions. [2022-11-16 12:02:24,761 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:02:24,761 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 792 transitions. [2022-11-16 12:02:24,765 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.57142857142857) internal successors, (792), 14 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:24,769 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:24,770 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:24,770 INFO L175 Difference]: Start difference. First operand has 132 places, 124 transitions, 880 flow. Second operand 14 states and 792 transitions. [2022-11-16 12:02:24,770 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 152 transitions, 1216 flow [2022-11-16 12:02:24,782 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 152 transitions, 1116 flow, removed 8 selfloop flow, removed 12 redundant places. [2022-11-16 12:02:24,786 INFO L231 Difference]: Finished difference. Result has 132 places, 121 transitions, 839 flow [2022-11-16 12:02:24,786 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=784, PETRI_DIFFERENCE_MINUEND_PLACES=116, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=839, PETRI_PLACES=132, PETRI_TRANSITIONS=121} [2022-11-16 12:02:24,788 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 55 predicate places. [2022-11-16 12:02:24,789 INFO L495 AbstractCegarLoop]: Abstraction has has 132 places, 121 transitions, 839 flow [2022-11-16 12:02:24,789 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:24,790 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:02:24,790 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, 1, 1, 1, 1, 1] [2022-11-16 12:02:24,790 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2022-11-16 12:02:24,790 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:02:24,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:24,791 INFO L85 PathProgramCache]: Analyzing trace with hash -1289263295, now seen corresponding path program 12 times [2022-11-16 12:02:24,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:24,791 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580074895] [2022-11-16 12:02:24,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:24,792 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:24,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:25,156 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:25,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:25,157 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580074895] [2022-11-16 12:02:25,157 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580074895] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:02:25,157 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:02:25,157 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-16 12:02:25,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977765838] [2022-11-16 12:02:25,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:02:25,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 12:02:25,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:25,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 12:02:25,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:02:25,159 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-16 12:02:25,160 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 121 transitions, 839 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:25,161 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:02:25,161 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-16 12:02:25,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:02:25,632 INFO L130 PetriNetUnfolder]: 185/531 cut-off events. [2022-11-16 12:02:25,632 INFO L131 PetriNetUnfolder]: For 1972/1974 co-relation queries the response was YES. [2022-11-16 12:02:25,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1937 conditions, 531 events. 185/531 cut-off events. For 1972/1974 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 2766 event pairs, 33 based on Foata normal form. 3/527 useless extension candidates. Maximal degree in co-relation 1909. Up to 141 conditions per place. [2022-11-16 12:02:25,639 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 66 selfloop transitions, 41 changer transitions 8/156 dead transitions. [2022-11-16 12:02:25,639 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 139 places, 156 transitions, 1216 flow [2022-11-16 12:02:25,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 12:02:25,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-16 12:02:25,641 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 796 transitions. [2022-11-16 12:02:25,642 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6535303776683087 [2022-11-16 12:02:25,642 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 796 transitions. [2022-11-16 12:02:25,642 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 796 transitions. [2022-11-16 12:02:25,643 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:02:25,643 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 796 transitions. [2022-11-16 12:02:25,645 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.857142857142854) internal successors, (796), 14 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:25,647 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:25,647 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:25,648 INFO L175 Difference]: Start difference. First operand has 132 places, 121 transitions, 839 flow. Second operand 14 states and 796 transitions. [2022-11-16 12:02:25,648 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 139 places, 156 transitions, 1216 flow [2022-11-16 12:02:25,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 156 transitions, 1122 flow, removed 7 selfloop flow, removed 11 redundant places. [2022-11-16 12:02:25,659 INFO L231 Difference]: Finished difference. Result has 133 places, 122 transitions, 853 flow [2022-11-16 12:02:25,660 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=749, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=853, PETRI_PLACES=133, PETRI_TRANSITIONS=122} [2022-11-16 12:02:25,660 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 56 predicate places. [2022-11-16 12:02:25,661 INFO L495 AbstractCegarLoop]: Abstraction has has 133 places, 122 transitions, 853 flow [2022-11-16 12:02:25,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:25,661 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:02:25,662 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, 1, 1, 1, 1, 1] [2022-11-16 12:02:25,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2022-11-16 12:02:25,662 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:02:25,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:25,663 INFO L85 PathProgramCache]: Analyzing trace with hash -2079023765, now seen corresponding path program 13 times [2022-11-16 12:02:25,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:25,663 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689956842] [2022-11-16 12:02:25,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:25,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:25,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:25,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:25,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:25,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689956842] [2022-11-16 12:02:25,970 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689956842] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:02:25,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:02:25,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-16 12:02:25,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866514128] [2022-11-16 12:02:25,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:02:25,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 12:02:25,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:25,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 12:02:25,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:02:25,973 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-16 12:02:25,974 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 122 transitions, 853 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:25,974 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:02:25,974 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-16 12:02:25,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:02:26,483 INFO L130 PetriNetUnfolder]: 178/481 cut-off events. [2022-11-16 12:02:26,484 INFO L131 PetriNetUnfolder]: For 1933/1935 co-relation queries the response was YES. [2022-11-16 12:02:26,486 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1863 conditions, 481 events. 178/481 cut-off events. For 1933/1935 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2388 event pairs, 45 based on Foata normal form. 1/471 useless extension candidates. Maximal degree in co-relation 1833. Up to 142 conditions per place. [2022-11-16 12:02:26,490 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 63 selfloop transitions, 42 changer transitions 7/153 dead transitions. [2022-11-16 12:02:26,490 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 153 transitions, 1232 flow [2022-11-16 12:02:26,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 12:02:26,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-16 12:02:26,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 792 transitions. [2022-11-16 12:02:26,493 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6502463054187192 [2022-11-16 12:02:26,493 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 792 transitions. [2022-11-16 12:02:26,494 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 792 transitions. [2022-11-16 12:02:26,494 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:02:26,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 792 transitions. [2022-11-16 12:02:26,496 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.57142857142857) internal successors, (792), 14 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:26,499 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:26,499 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:26,499 INFO L175 Difference]: Start difference. First operand has 133 places, 122 transitions, 853 flow. Second operand 14 states and 792 transitions. [2022-11-16 12:02:26,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 153 transitions, 1232 flow [2022-11-16 12:02:26,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 153 transitions, 1130 flow, removed 9 selfloop flow, removed 12 redundant places. [2022-11-16 12:02:26,514 INFO L231 Difference]: Finished difference. Result has 136 places, 124 transitions, 893 flow [2022-11-16 12:02:26,515 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=759, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=893, PETRI_PLACES=136, PETRI_TRANSITIONS=124} [2022-11-16 12:02:26,516 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 59 predicate places. [2022-11-16 12:02:26,516 INFO L495 AbstractCegarLoop]: Abstraction has has 136 places, 124 transitions, 893 flow [2022-11-16 12:02:26,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:26,517 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:02:26,517 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, 1, 1, 1, 1, 1] [2022-11-16 12:02:26,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2022-11-16 12:02:26,517 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:02:26,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:26,518 INFO L85 PathProgramCache]: Analyzing trace with hash 1483632299, now seen corresponding path program 14 times [2022-11-16 12:02:26,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:26,519 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252487543] [2022-11-16 12:02:26,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:26,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:26,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:26,864 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:26,864 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:26,864 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252487543] [2022-11-16 12:02:26,864 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252487543] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:02:26,864 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:02:26,864 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-16 12:02:26,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332283311] [2022-11-16 12:02:26,865 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:02:26,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 12:02:26,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:26,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 12:02:26,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:02:26,866 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-16 12:02:26,867 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 124 transitions, 893 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:26,867 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:02:26,867 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-16 12:02:26,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:02:27,311 INFO L130 PetriNetUnfolder]: 184/541 cut-off events. [2022-11-16 12:02:27,311 INFO L131 PetriNetUnfolder]: For 2020/2024 co-relation queries the response was YES. [2022-11-16 12:02:27,314 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2006 conditions, 541 events. 184/541 cut-off events. For 2020/2024 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 2891 event pairs, 42 based on Foata normal form. 3/535 useless extension candidates. Maximal degree in co-relation 1974. Up to 132 conditions per place. [2022-11-16 12:02:27,318 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 75 selfloop transitions, 40 changer transitions 7/163 dead transitions. [2022-11-16 12:02:27,318 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 145 places, 163 transitions, 1328 flow [2022-11-16 12:02:27,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 12:02:27,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-16 12:02:27,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 793 transitions. [2022-11-16 12:02:27,324 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6510673234811166 [2022-11-16 12:02:27,325 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 793 transitions. [2022-11-16 12:02:27,325 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 793 transitions. [2022-11-16 12:02:27,325 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:02:27,326 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 793 transitions. [2022-11-16 12:02:27,328 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.642857142857146) internal successors, (793), 14 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:27,330 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:27,331 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:27,331 INFO L175 Difference]: Start difference. First operand has 136 places, 124 transitions, 893 flow. Second operand 14 states and 793 transitions. [2022-11-16 12:02:27,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 145 places, 163 transitions, 1328 flow [2022-11-16 12:02:27,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 163 transitions, 1247 flow, removed 9 selfloop flow, removed 10 redundant places. [2022-11-16 12:02:27,344 INFO L231 Difference]: Finished difference. Result has 141 places, 127 transitions, 941 flow [2022-11-16 12:02:27,345 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=820, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=941, PETRI_PLACES=141, PETRI_TRANSITIONS=127} [2022-11-16 12:02:27,346 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 64 predicate places. [2022-11-16 12:02:27,346 INFO L495 AbstractCegarLoop]: Abstraction has has 141 places, 127 transitions, 941 flow [2022-11-16 12:02:27,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:27,347 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:02:27,347 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, 1, 1, 1, 1, 1] [2022-11-16 12:02:27,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2022-11-16 12:02:27,348 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:02:27,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:27,349 INFO L85 PathProgramCache]: Analyzing trace with hash -829072727, now seen corresponding path program 15 times [2022-11-16 12:02:27,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:27,349 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813727730] [2022-11-16 12:02:27,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:27,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:27,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:27,685 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:27,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:27,685 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813727730] [2022-11-16 12:02:27,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813727730] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:02:27,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:02:27,689 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-16 12:02:27,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [546663617] [2022-11-16 12:02:27,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:02:27,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 12:02:27,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:27,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 12:02:27,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=147, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:02:27,693 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-16 12:02:27,694 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 141 places, 127 transitions, 941 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:27,694 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:02:27,694 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-16 12:02:27,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:02:28,124 INFO L130 PetriNetUnfolder]: 180/523 cut-off events. [2022-11-16 12:02:28,125 INFO L131 PetriNetUnfolder]: For 2084/2086 co-relation queries the response was YES. [2022-11-16 12:02:28,128 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2002 conditions, 523 events. 180/523 cut-off events. For 2084/2086 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 2823 event pairs, 49 based on Foata normal form. 1/513 useless extension candidates. Maximal degree in co-relation 1968. Up to 152 conditions per place. [2022-11-16 12:02:28,132 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 73 selfloop transitions, 41 changer transitions 7/162 dead transitions. [2022-11-16 12:02:28,132 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 150 places, 162 transitions, 1368 flow [2022-11-16 12:02:28,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 12:02:28,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-16 12:02:28,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 792 transitions. [2022-11-16 12:02:28,135 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6502463054187192 [2022-11-16 12:02:28,135 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 792 transitions. [2022-11-16 12:02:28,135 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 792 transitions. [2022-11-16 12:02:28,135 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:02:28,136 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 792 transitions. [2022-11-16 12:02:28,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.57142857142857) internal successors, (792), 14 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:28,140 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:28,140 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:28,140 INFO L175 Difference]: Start difference. First operand has 141 places, 127 transitions, 941 flow. Second operand 14 states and 792 transitions. [2022-11-16 12:02:28,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 150 places, 162 transitions, 1368 flow [2022-11-16 12:02:28,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 162 transitions, 1275 flow, removed 11 selfloop flow, removed 11 redundant places. [2022-11-16 12:02:28,155 INFO L231 Difference]: Finished difference. Result has 144 places, 129 transitions, 970 flow [2022-11-16 12:02:28,155 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=858, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=127, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=970, PETRI_PLACES=144, PETRI_TRANSITIONS=129} [2022-11-16 12:02:28,156 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 67 predicate places. [2022-11-16 12:02:28,156 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 129 transitions, 970 flow [2022-11-16 12:02:28,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:28,157 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:02:28,157 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, 1, 1, 1, 1, 1] [2022-11-16 12:02:28,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2022-11-16 12:02:28,158 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:02:28,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:28,158 INFO L85 PathProgramCache]: Analyzing trace with hash 1491831339, now seen corresponding path program 16 times [2022-11-16 12:02:28,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:28,159 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522631572] [2022-11-16 12:02:28,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:28,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:28,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:28,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:28,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:28,467 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522631572] [2022-11-16 12:02:28,467 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1522631572] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:02:28,467 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:02:28,467 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-16 12:02:28,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038489328] [2022-11-16 12:02:28,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:02:28,468 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 12:02:28,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:28,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 12:02:28,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:02:28,469 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-16 12:02:28,471 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 129 transitions, 970 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:28,471 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:02:28,471 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-16 12:02:28,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:02:28,833 INFO L130 PetriNetUnfolder]: 183/555 cut-off events. [2022-11-16 12:02:28,833 INFO L131 PetriNetUnfolder]: For 2218/2222 co-relation queries the response was YES. [2022-11-16 12:02:28,837 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2087 conditions, 555 events. 183/555 cut-off events. For 2218/2222 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 3057 event pairs, 42 based on Foata normal form. 3/549 useless extension candidates. Maximal degree in co-relation 2052. Up to 164 conditions per place. [2022-11-16 12:02:28,840 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 71 selfloop transitions, 38 changer transitions 8/158 dead transitions. [2022-11-16 12:02:28,841 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 158 transitions, 1359 flow [2022-11-16 12:02:28,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 12:02:28,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-16 12:02:28,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 788 transitions. [2022-11-16 12:02:28,843 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6469622331691297 [2022-11-16 12:02:28,843 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 788 transitions. [2022-11-16 12:02:28,843 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 788 transitions. [2022-11-16 12:02:28,844 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:02:28,844 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 788 transitions. [2022-11-16 12:02:28,846 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.285714285714285) internal successors, (788), 14 states have internal predecessors, (788), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:28,849 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:28,849 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:28,849 INFO L175 Difference]: Start difference. First operand has 144 places, 129 transitions, 970 flow. Second operand 14 states and 788 transitions. [2022-11-16 12:02:28,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 158 transitions, 1359 flow [2022-11-16 12:02:28,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 158 transitions, 1263 flow, removed 9 selfloop flow, removed 12 redundant places. [2022-11-16 12:02:28,863 INFO L231 Difference]: Finished difference. Result has 144 places, 126 transitions, 925 flow [2022-11-16 12:02:28,864 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=878, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=129, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=925, PETRI_PLACES=144, PETRI_TRANSITIONS=126} [2022-11-16 12:02:28,864 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 67 predicate places. [2022-11-16 12:02:28,864 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 126 transitions, 925 flow [2022-11-16 12:02:28,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:28,865 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:02:28,865 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, 1, 1, 1, 1, 1] [2022-11-16 12:02:28,865 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2022-11-16 12:02:28,866 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:02:28,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:28,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1006613059, now seen corresponding path program 17 times [2022-11-16 12:02:28,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:28,866 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [218275191] [2022-11-16 12:02:28,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:28,867 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:28,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:29,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:29,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:29,222 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [218275191] [2022-11-16 12:02:29,222 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [218275191] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:02:29,222 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:02:29,222 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-16 12:02:29,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433863234] [2022-11-16 12:02:29,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:02:29,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 12:02:29,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:29,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 12:02:29,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:02:29,224 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-16 12:02:29,225 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 126 transitions, 925 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:29,225 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:02:29,225 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-16 12:02:29,226 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:02:29,744 INFO L130 PetriNetUnfolder]: 179/519 cut-off events. [2022-11-16 12:02:29,745 INFO L131 PetriNetUnfolder]: For 2138/2140 co-relation queries the response was YES. [2022-11-16 12:02:29,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2008 conditions, 519 events. 179/519 cut-off events. For 2138/2140 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2811 event pairs, 45 based on Foata normal form. 1/508 useless extension candidates. Maximal degree in co-relation 1974. Up to 155 conditions per place. [2022-11-16 12:02:29,752 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 67 selfloop transitions, 38 changer transitions 9/155 dead transitions. [2022-11-16 12:02:29,752 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 155 transitions, 1288 flow [2022-11-16 12:02:29,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 12:02:29,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-16 12:02:29,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 793 transitions. [2022-11-16 12:02:29,757 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6510673234811166 [2022-11-16 12:02:29,757 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 793 transitions. [2022-11-16 12:02:29,758 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 793 transitions. [2022-11-16 12:02:29,758 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:02:29,758 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 793 transitions. [2022-11-16 12:02:29,760 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.642857142857146) internal successors, (793), 14 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:29,763 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:29,764 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:29,764 INFO L175 Difference]: Start difference. First operand has 144 places, 126 transitions, 925 flow. Second operand 14 states and 793 transitions. [2022-11-16 12:02:29,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 155 transitions, 1288 flow [2022-11-16 12:02:29,775 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 155 transitions, 1200 flow, removed 6 selfloop flow, removed 11 redundant places. [2022-11-16 12:02:29,778 INFO L231 Difference]: Finished difference. Result has 144 places, 124 transitions, 899 flow [2022-11-16 12:02:29,778 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=841, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=38, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=899, PETRI_PLACES=144, PETRI_TRANSITIONS=124} [2022-11-16 12:02:29,779 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 67 predicate places. [2022-11-16 12:02:29,779 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 124 transitions, 899 flow [2022-11-16 12:02:29,780 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:29,780 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:02:29,780 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, 1, 1, 1, 1, 1] [2022-11-16 12:02:29,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2022-11-16 12:02:29,780 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:02:29,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:29,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1038989917, now seen corresponding path program 18 times [2022-11-16 12:02:29,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:29,781 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284983285] [2022-11-16 12:02:29,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:29,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:29,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:30,104 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:30,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:30,105 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284983285] [2022-11-16 12:02:30,105 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284983285] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:02:30,105 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:02:30,105 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-16 12:02:30,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1969731040] [2022-11-16 12:02:30,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:02:30,106 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 12:02:30,106 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:30,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 12:02:30,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:02:30,107 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-16 12:02:30,108 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 124 transitions, 899 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:30,108 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:02:30,108 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-16 12:02:30,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:02:30,629 INFO L130 PetriNetUnfolder]: 185/566 cut-off events. [2022-11-16 12:02:30,629 INFO L131 PetriNetUnfolder]: For 2297/2301 co-relation queries the response was YES. [2022-11-16 12:02:30,633 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2094 conditions, 566 events. 185/566 cut-off events. For 2297/2301 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 3188 event pairs, 39 based on Foata normal form. 3/561 useless extension candidates. Maximal degree in co-relation 2059. Up to 158 conditions per place. [2022-11-16 12:02:30,637 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 71 selfloop transitions, 39 changer transitions 8/159 dead transitions. [2022-11-16 12:02:30,637 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 159 transitions, 1308 flow [2022-11-16 12:02:30,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 12:02:30,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-16 12:02:30,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 796 transitions. [2022-11-16 12:02:30,639 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6535303776683087 [2022-11-16 12:02:30,639 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 796 transitions. [2022-11-16 12:02:30,639 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 796 transitions. [2022-11-16 12:02:30,640 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:02:30,640 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 796 transitions. [2022-11-16 12:02:30,642 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.857142857142854) internal successors, (796), 14 states have internal predecessors, (796), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:30,644 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:30,644 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:30,645 INFO L175 Difference]: Start difference. First operand has 144 places, 124 transitions, 899 flow. Second operand 14 states and 796 transitions. [2022-11-16 12:02:30,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 159 transitions, 1308 flow [2022-11-16 12:02:30,655 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 159 transitions, 1216 flow, removed 8 selfloop flow, removed 12 redundant places. [2022-11-16 12:02:30,658 INFO L231 Difference]: Finished difference. Result has 144 places, 126 transitions, 926 flow [2022-11-16 12:02:30,658 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=815, PETRI_DIFFERENCE_MINUEND_PLACES=126, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=926, PETRI_PLACES=144, PETRI_TRANSITIONS=126} [2022-11-16 12:02:30,659 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 67 predicate places. [2022-11-16 12:02:30,659 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 126 transitions, 926 flow [2022-11-16 12:02:30,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:30,660 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:02:30,660 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, 1, 1, 1, 1, 1] [2022-11-16 12:02:30,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2022-11-16 12:02:30,661 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:02:30,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:30,661 INFO L85 PathProgramCache]: Analyzing trace with hash -978047267, now seen corresponding path program 19 times [2022-11-16 12:02:30,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:30,662 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [496607123] [2022-11-16 12:02:30,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:30,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:30,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:31,045 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:31,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:31,046 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [496607123] [2022-11-16 12:02:31,046 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [496607123] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:02:31,046 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:02:31,046 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-16 12:02:31,046 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047152887] [2022-11-16 12:02:31,046 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:02:31,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 12:02:31,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:31,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 12:02:31,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=148, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:02:31,048 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-16 12:02:31,049 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 126 transitions, 926 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:31,049 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:02:31,049 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-16 12:02:31,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:02:31,521 INFO L130 PetriNetUnfolder]: 180/525 cut-off events. [2022-11-16 12:02:31,522 INFO L131 PetriNetUnfolder]: For 2311/2313 co-relation queries the response was YES. [2022-11-16 12:02:31,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2044 conditions, 525 events. 180/525 cut-off events. For 2311/2313 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 2860 event pairs, 48 based on Foata normal form. 1/515 useless extension candidates. Maximal degree in co-relation 2008. Up to 162 conditions per place. [2022-11-16 12:02:31,529 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 68 selfloop transitions, 36 changer transitions 9/154 dead transitions. [2022-11-16 12:02:31,529 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 154 transitions, 1284 flow [2022-11-16 12:02:31,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 12:02:31,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-16 12:02:31,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 791 transitions. [2022-11-16 12:02:31,540 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6494252873563219 [2022-11-16 12:02:31,541 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 791 transitions. [2022-11-16 12:02:31,541 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 791 transitions. [2022-11-16 12:02:31,543 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:02:31,543 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 791 transitions. [2022-11-16 12:02:31,547 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.5) internal successors, (791), 14 states have internal predecessors, (791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:31,554 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:31,556 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:31,556 INFO L175 Difference]: Start difference. First operand has 144 places, 126 transitions, 926 flow. Second operand 14 states and 791 transitions. [2022-11-16 12:02:31,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 154 transitions, 1284 flow [2022-11-16 12:02:31,568 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 154 transitions, 1190 flow, removed 10 selfloop flow, removed 12 redundant places. [2022-11-16 12:02:31,571 INFO L231 Difference]: Finished difference. Result has 144 places, 123 transitions, 879 flow [2022-11-16 12:02:31,571 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=836, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=879, PETRI_PLACES=144, PETRI_TRANSITIONS=123} [2022-11-16 12:02:31,573 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 67 predicate places. [2022-11-16 12:02:31,573 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 123 transitions, 879 flow [2022-11-16 12:02:31,574 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:31,574 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:02:31,574 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, 1, 1, 1, 1, 1] [2022-11-16 12:02:31,574 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-16 12:02:31,575 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:02:31,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:31,575 INFO L85 PathProgramCache]: Analyzing trace with hash 840891619, now seen corresponding path program 20 times [2022-11-16 12:02:31,575 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:31,576 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322719251] [2022-11-16 12:02:31,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:31,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:31,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:31,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:31,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:31,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322719251] [2022-11-16 12:02:31,881 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322719251] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:02:31,881 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:02:31,881 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [14] imperfect sequences [] total 14 [2022-11-16 12:02:31,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553194142] [2022-11-16 12:02:31,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:02:31,882 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-16 12:02:31,882 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:31,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-16 12:02:31,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=150, Unknown=0, NotChecked=0, Total=182 [2022-11-16 12:02:31,884 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 51 out of 87 [2022-11-16 12:02:31,884 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 123 transitions, 879 flow. Second operand has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:31,885 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:02:31,885 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 51 of 87 [2022-11-16 12:02:31,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:02:32,421 INFO L130 PetriNetUnfolder]: 180/555 cut-off events. [2022-11-16 12:02:32,421 INFO L131 PetriNetUnfolder]: For 2306/2310 co-relation queries the response was YES. [2022-11-16 12:02:32,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2063 conditions, 555 events. 180/555 cut-off events. For 2306/2310 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3078 event pairs, 37 based on Foata normal form. 3/550 useless extension candidates. Maximal degree in co-relation 2028. Up to 162 conditions per place. [2022-11-16 12:02:32,428 INFO L137 encePairwiseOnDemand]: 71/87 looper letters, 70 selfloop transitions, 37 changer transitions 7/155 dead transitions. [2022-11-16 12:02:32,428 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 151 places, 155 transitions, 1266 flow [2022-11-16 12:02:32,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2022-11-16 12:02:32,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2022-11-16 12:02:32,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 793 transitions. [2022-11-16 12:02:32,430 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6510673234811166 [2022-11-16 12:02:32,431 INFO L72 ComplementDD]: Start complementDD. Operand 14 states and 793 transitions. [2022-11-16 12:02:32,431 INFO L73 IsDeterministic]: Start isDeterministic. Operand 14 states and 793 transitions. [2022-11-16 12:02:32,431 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:02:32,432 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 14 states and 793 transitions. [2022-11-16 12:02:32,433 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 15 states, 14 states have (on average 56.642857142857146) internal successors, (793), 14 states have internal predecessors, (793), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:32,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:32,436 INFO L81 ComplementDD]: Finished complementDD. Result has 15 states, 15 states have (on average 87.0) internal successors, (1305), 15 states have internal predecessors, (1305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:32,436 INFO L175 Difference]: Start difference. First operand has 144 places, 123 transitions, 879 flow. Second operand 14 states and 793 transitions. [2022-11-16 12:02:32,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 151 places, 155 transitions, 1266 flow [2022-11-16 12:02:32,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 140 places, 155 transitions, 1182 flow, removed 6 selfloop flow, removed 11 redundant places. [2022-11-16 12:02:32,449 INFO L231 Difference]: Finished difference. Result has 145 places, 124 transitions, 897 flow [2022-11-16 12:02:32,449 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=799, PETRI_DIFFERENCE_MINUEND_PLACES=127, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=897, PETRI_PLACES=145, PETRI_TRANSITIONS=124} [2022-11-16 12:02:32,449 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 68 predicate places. [2022-11-16 12:02:32,450 INFO L495 AbstractCegarLoop]: Abstraction has has 145 places, 124 transitions, 897 flow [2022-11-16 12:02:32,450 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 52.642857142857146) internal successors, (737), 14 states have internal predecessors, (737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:32,450 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:02:32,450 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:32,451 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2022-11-16 12:02:32,451 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:02:32,451 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:32,451 INFO L85 PathProgramCache]: Analyzing trace with hash -859363161, now seen corresponding path program 1 times [2022-11-16 12:02:32,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:32,452 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859942363] [2022-11-16 12:02:32,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:32,452 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:32,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:32,503 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:32,504 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:32,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859942363] [2022-11-16 12:02:32,504 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859942363] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:02:32,504 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859309251] [2022-11-16 12:02:32,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:32,505 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:02:32,505 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:02:32,509 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:02:32,547 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-16 12:02:32,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:32,617 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:02:32,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:02:32,677 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:32,677 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:02:32,736 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:32,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859309251] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:02:32,737 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:02:32,737 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 6 [2022-11-16 12:02:32,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500270125] [2022-11-16 12:02:32,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:02:32,737 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:02:32,737 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:32,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:02:32,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:02:32,738 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-11-16 12:02:32,739 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 124 transitions, 897 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:32,739 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:02:32,739 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-11-16 12:02:32,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:02:32,996 INFO L130 PetriNetUnfolder]: 187/539 cut-off events. [2022-11-16 12:02:32,996 INFO L131 PetriNetUnfolder]: For 2686/2688 co-relation queries the response was YES. [2022-11-16 12:02:32,999 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2097 conditions, 539 events. 187/539 cut-off events. For 2686/2688 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 2892 event pairs, 14 based on Foata normal form. 8/541 useless extension candidates. Maximal degree in co-relation 2060. Up to 139 conditions per place. [2022-11-16 12:02:33,003 INFO L137 encePairwiseOnDemand]: 79/87 looper letters, 92 selfloop transitions, 35 changer transitions 0/176 dead transitions. [2022-11-16 12:02:33,003 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 176 transitions, 1673 flow [2022-11-16 12:02:33,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:02:33,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 12:02:33,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 483 transitions. [2022-11-16 12:02:33,005 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7931034482758621 [2022-11-16 12:02:33,005 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 483 transitions. [2022-11-16 12:02:33,005 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 483 transitions. [2022-11-16 12:02:33,006 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:02:33,006 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 483 transitions. [2022-11-16 12:02:33,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.0) internal successors, (483), 7 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:33,008 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:33,008 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:33,009 INFO L175 Difference]: Start difference. First operand has 145 places, 124 transitions, 897 flow. Second operand 7 states and 483 transitions. [2022-11-16 12:02:33,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 176 transitions, 1673 flow [2022-11-16 12:02:33,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 176 transitions, 1544 flow, removed 8 selfloop flow, removed 12 redundant places. [2022-11-16 12:02:33,024 INFO L231 Difference]: Finished difference. Result has 137 places, 139 transitions, 1053 flow [2022-11-16 12:02:33,024 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=809, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1053, PETRI_PLACES=137, PETRI_TRANSITIONS=139} [2022-11-16 12:02:33,025 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 60 predicate places. [2022-11-16 12:02:33,025 INFO L495 AbstractCegarLoop]: Abstraction has has 137 places, 139 transitions, 1053 flow [2022-11-16 12:02:33,025 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:33,025 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:02:33,025 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:33,037 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-16 12:02:33,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:02:33,231 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:02:33,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:33,232 INFO L85 PathProgramCache]: Analyzing trace with hash -1780751315, now seen corresponding path program 2 times [2022-11-16 12:02:33,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:33,232 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1451285298] [2022-11-16 12:02:33,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:33,232 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:33,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:33,306 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:33,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:33,306 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1451285298] [2022-11-16 12:02:33,306 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1451285298] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:02:33,307 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:02:33,307 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:02:33,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720141321] [2022-11-16 12:02:33,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:02:33,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:02:33,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:33,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:02:33,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:02:33,309 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-11-16 12:02:33,309 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 139 transitions, 1053 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:33,309 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:02:33,310 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-11-16 12:02:33,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:02:33,541 INFO L130 PetriNetUnfolder]: 219/656 cut-off events. [2022-11-16 12:02:33,542 INFO L131 PetriNetUnfolder]: For 3305/3311 co-relation queries the response was YES. [2022-11-16 12:02:33,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2569 conditions, 656 events. 219/656 cut-off events. For 3305/3311 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 3850 event pairs, 48 based on Foata normal form. 4/653 useless extension candidates. Maximal degree in co-relation 2534. Up to 144 conditions per place. [2022-11-16 12:02:33,551 INFO L137 encePairwiseOnDemand]: 79/87 looper letters, 104 selfloop transitions, 45 changer transitions 0/198 dead transitions. [2022-11-16 12:02:33,551 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 198 transitions, 1840 flow [2022-11-16 12:02:33,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:02:33,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-16 12:02:33,552 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 561 transitions. [2022-11-16 12:02:33,553 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8060344827586207 [2022-11-16 12:02:33,553 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 561 transitions. [2022-11-16 12:02:33,553 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 561 transitions. [2022-11-16 12:02:33,554 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:02:33,554 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 561 transitions. [2022-11-16 12:02:33,555 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 70.125) internal successors, (561), 8 states have internal predecessors, (561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:33,556 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:33,556 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:33,557 INFO L175 Difference]: Start difference. First operand has 137 places, 139 transitions, 1053 flow. Second operand 8 states and 561 transitions. [2022-11-16 12:02:33,557 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 198 transitions, 1840 flow [2022-11-16 12:02:33,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 143 places, 198 transitions, 1780 flow, removed 25 selfloop flow, removed 1 redundant places. [2022-11-16 12:02:33,575 INFO L231 Difference]: Finished difference. Result has 149 places, 156 transitions, 1403 flow [2022-11-16 12:02:33,576 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1017, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1403, PETRI_PLACES=149, PETRI_TRANSITIONS=156} [2022-11-16 12:02:33,576 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 72 predicate places. [2022-11-16 12:02:33,576 INFO L495 AbstractCegarLoop]: Abstraction has has 149 places, 156 transitions, 1403 flow [2022-11-16 12:02:33,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:33,577 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:02:33,577 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:33,577 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2022-11-16 12:02:33,578 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:02:33,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:33,578 INFO L85 PathProgramCache]: Analyzing trace with hash -18586231, now seen corresponding path program 1 times [2022-11-16 12:02:33,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:33,578 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029781604] [2022-11-16 12:02:33,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:33,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:33,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:33,637 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:33,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:33,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029781604] [2022-11-16 12:02:33,638 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029781604] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:02:33,638 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1611577974] [2022-11-16 12:02:33,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:33,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:02:33,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:02:33,640 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:02:33,670 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-16 12:02:33,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:33,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:02:33,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:02:33,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:33,769 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:02:33,809 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:33,810 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1611577974] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:02:33,810 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:02:33,810 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 6 [2022-11-16 12:02:33,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103234372] [2022-11-16 12:02:33,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:02:33,811 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:02:33,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:33,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:02:33,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-16 12:02:33,812 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-11-16 12:02:33,813 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 156 transitions, 1403 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:33,813 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:02:33,813 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-11-16 12:02:33,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:02:34,014 INFO L130 PetriNetUnfolder]: 226/667 cut-off events. [2022-11-16 12:02:34,014 INFO L131 PetriNetUnfolder]: For 4628/4628 co-relation queries the response was YES. [2022-11-16 12:02:34,018 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2836 conditions, 667 events. 226/667 cut-off events. For 4628/4628 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 3810 event pairs, 29 based on Foata normal form. 7/668 useless extension candidates. Maximal degree in co-relation 2795. Up to 201 conditions per place. [2022-11-16 12:02:34,023 INFO L137 encePairwiseOnDemand]: 79/87 looper letters, 108 selfloop transitions, 52 changer transitions 2/211 dead transitions. [2022-11-16 12:02:34,023 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 211 transitions, 2317 flow [2022-11-16 12:02:34,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:02:34,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 12:02:34,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 481 transitions. [2022-11-16 12:02:34,025 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7898193760262726 [2022-11-16 12:02:34,025 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 481 transitions. [2022-11-16 12:02:34,025 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 481 transitions. [2022-11-16 12:02:34,026 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:02:34,026 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 481 transitions. [2022-11-16 12:02:34,027 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 68.71428571428571) internal successors, (481), 7 states have internal predecessors, (481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:34,028 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:34,028 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:34,028 INFO L175 Difference]: Start difference. First operand has 149 places, 156 transitions, 1403 flow. Second operand 7 states and 481 transitions. [2022-11-16 12:02:34,029 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 211 transitions, 2317 flow [2022-11-16 12:02:34,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 152 places, 211 transitions, 2265 flow, removed 19 selfloop flow, removed 3 redundant places. [2022-11-16 12:02:34,057 INFO L231 Difference]: Finished difference. Result has 155 places, 175 transitions, 1761 flow [2022-11-16 12:02:34,057 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1372, PETRI_DIFFERENCE_MINUEND_PLACES=146, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1761, PETRI_PLACES=155, PETRI_TRANSITIONS=175} [2022-11-16 12:02:34,058 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 78 predicate places. [2022-11-16 12:02:34,058 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 175 transitions, 1761 flow [2022-11-16 12:02:34,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:34,058 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:02:34,059 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:34,070 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-16 12:02:34,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2022-11-16 12:02:34,264 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:02:34,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:34,265 INFO L85 PathProgramCache]: Analyzing trace with hash -2090104067, now seen corresponding path program 2 times [2022-11-16 12:02:34,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:34,265 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1001705627] [2022-11-16 12:02:34,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:34,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:34,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:34,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:34,320 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:34,320 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1001705627] [2022-11-16 12:02:34,320 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1001705627] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:02:34,320 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:02:34,320 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:02:34,321 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102586234] [2022-11-16 12:02:34,321 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:02:34,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:02:34,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:34,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:02:34,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:02:34,323 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-11-16 12:02:34,323 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 175 transitions, 1761 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:34,324 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:02:34,324 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-11-16 12:02:34,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:02:34,576 INFO L130 PetriNetUnfolder]: 215/671 cut-off events. [2022-11-16 12:02:34,577 INFO L131 PetriNetUnfolder]: For 5050/5057 co-relation queries the response was YES. [2022-11-16 12:02:34,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2921 conditions, 671 events. 215/671 cut-off events. For 5050/5057 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 3896 event pairs, 49 based on Foata normal form. 7/670 useless extension candidates. Maximal degree in co-relation 2879. Up to 155 conditions per place. [2022-11-16 12:02:34,587 INFO L137 encePairwiseOnDemand]: 81/87 looper letters, 121 selfloop transitions, 34 changer transitions 5/209 dead transitions. [2022-11-16 12:02:34,587 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 209 transitions, 2367 flow [2022-11-16 12:02:34,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:02:34,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 12:02:34,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 486 transitions. [2022-11-16 12:02:34,589 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7980295566502463 [2022-11-16 12:02:34,589 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 486 transitions. [2022-11-16 12:02:34,589 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 486 transitions. [2022-11-16 12:02:34,590 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:02:34,590 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 486 transitions. [2022-11-16 12:02:34,591 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.42857142857143) internal successors, (486), 7 states have internal predecessors, (486), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:34,593 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:34,593 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:34,593 INFO L175 Difference]: Start difference. First operand has 155 places, 175 transitions, 1761 flow. Second operand 7 states and 486 transitions. [2022-11-16 12:02:34,593 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 209 transitions, 2367 flow [2022-11-16 12:02:34,623 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 209 transitions, 2282 flow, removed 35 selfloop flow, removed 1 redundant places. [2022-11-16 12:02:34,627 INFO L231 Difference]: Finished difference. Result has 161 places, 174 transitions, 1753 flow [2022-11-16 12:02:34,628 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1646, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=172, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=143, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1753, PETRI_PLACES=161, PETRI_TRANSITIONS=174} [2022-11-16 12:02:34,628 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 84 predicate places. [2022-11-16 12:02:34,628 INFO L495 AbstractCegarLoop]: Abstraction has has 161 places, 174 transitions, 1753 flow [2022-11-16 12:02:34,629 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:34,629 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:02:34,629 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:34,629 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2022-11-16 12:02:34,630 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:02:34,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:34,630 INFO L85 PathProgramCache]: Analyzing trace with hash 583671365, now seen corresponding path program 3 times [2022-11-16 12:02:34,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:34,631 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099312448] [2022-11-16 12:02:34,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:34,631 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:34,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:34,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:34,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:34,687 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099312448] [2022-11-16 12:02:34,688 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099312448] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:02:34,688 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:02:34,688 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:02:34,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783480916] [2022-11-16 12:02:34,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:02:34,689 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:02:34,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:34,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:02:34,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:02:34,690 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-11-16 12:02:34,691 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 174 transitions, 1753 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:34,691 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:02:34,691 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-11-16 12:02:34,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:02:35,007 INFO L130 PetriNetUnfolder]: 235/740 cut-off events. [2022-11-16 12:02:35,007 INFO L131 PetriNetUnfolder]: For 5864/5870 co-relation queries the response was YES. [2022-11-16 12:02:35,013 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3214 conditions, 740 events. 235/740 cut-off events. For 5864/5870 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4476 event pairs, 60 based on Foata normal form. 7/740 useless extension candidates. Maximal degree in co-relation 3171. Up to 177 conditions per place. [2022-11-16 12:02:35,025 INFO L137 encePairwiseOnDemand]: 79/87 looper letters, 130 selfloop transitions, 62 changer transitions 2/243 dead transitions. [2022-11-16 12:02:35,025 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 243 transitions, 2818 flow [2022-11-16 12:02:35,026 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:02:35,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-16 12:02:35,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 566 transitions. [2022-11-16 12:02:35,027 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8132183908045977 [2022-11-16 12:02:35,028 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 566 transitions. [2022-11-16 12:02:35,028 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 566 transitions. [2022-11-16 12:02:35,028 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:02:35,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 566 transitions. [2022-11-16 12:02:35,030 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 70.75) internal successors, (566), 8 states have internal predecessors, (566), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:35,031 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:35,031 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:35,032 INFO L175 Difference]: Start difference. First operand has 161 places, 174 transitions, 1753 flow. Second operand 8 states and 566 transitions. [2022-11-16 12:02:35,032 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 243 transitions, 2818 flow [2022-11-16 12:02:35,062 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 243 transitions, 2712 flow, removed 35 selfloop flow, removed 7 redundant places. [2022-11-16 12:02:35,066 INFO L231 Difference]: Finished difference. Result has 163 places, 191 transitions, 2121 flow [2022-11-16 12:02:35,067 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=1686, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2121, PETRI_PLACES=163, PETRI_TRANSITIONS=191} [2022-11-16 12:02:35,068 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 86 predicate places. [2022-11-16 12:02:35,068 INFO L495 AbstractCegarLoop]: Abstraction has has 163 places, 191 transitions, 2121 flow [2022-11-16 12:02:35,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:35,069 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:02:35,069 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:35,069 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2022-11-16 12:02:35,069 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:02:35,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:35,070 INFO L85 PathProgramCache]: Analyzing trace with hash 673278061, now seen corresponding path program 3 times [2022-11-16 12:02:35,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:35,070 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664476061] [2022-11-16 12:02:35,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:35,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:35,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:35,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:35,134 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:35,134 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664476061] [2022-11-16 12:02:35,135 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664476061] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:02:35,135 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1110529569] [2022-11-16 12:02:35,135 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:02:35,135 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:02:35,135 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:02:35,137 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:02:35,144 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-16 12:02:35,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 12:02:35,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:02:35,238 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:02:35,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:02:35,263 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:35,263 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:02:35,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:35,314 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1110529569] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:02:35,314 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:02:35,314 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2022-11-16 12:02:35,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301193398] [2022-11-16 12:02:35,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:02:35,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:02:35,318 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:35,318 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:02:35,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:02:35,319 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-11-16 12:02:35,320 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 191 transitions, 2121 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:35,320 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:02:35,320 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-11-16 12:02:35,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:02:35,606 INFO L130 PetriNetUnfolder]: 254/863 cut-off events. [2022-11-16 12:02:35,606 INFO L131 PetriNetUnfolder]: For 6593/6603 co-relation queries the response was YES. [2022-11-16 12:02:35,612 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3618 conditions, 863 events. 254/863 cut-off events. For 6593/6603 co-relation queries the response was YES. Maximal size of possible extension queue 67. Compared 5588 event pairs, 50 based on Foata normal form. 12/865 useless extension candidates. Maximal degree in co-relation 3576. Up to 172 conditions per place. [2022-11-16 12:02:35,621 INFO L137 encePairwiseOnDemand]: 75/87 looper letters, 105 selfloop transitions, 87 changer transitions 2/243 dead transitions. [2022-11-16 12:02:35,621 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 243 transitions, 3013 flow [2022-11-16 12:02:35,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:02:35,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-16 12:02:35,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 428 transitions. [2022-11-16 12:02:35,623 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8199233716475096 [2022-11-16 12:02:35,624 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 428 transitions. [2022-11-16 12:02:35,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 428 transitions. [2022-11-16 12:02:35,624 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:02:35,624 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 428 transitions. [2022-11-16 12:02:35,625 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 71.33333333333333) internal successors, (428), 6 states have internal predecessors, (428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:35,626 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:35,627 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:35,627 INFO L175 Difference]: Start difference. First operand has 163 places, 191 transitions, 2121 flow. Second operand 6 states and 428 transitions. [2022-11-16 12:02:35,627 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 243 transitions, 3013 flow [2022-11-16 12:02:35,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 243 transitions, 2969 flow, removed 22 selfloop flow, removed 0 redundant places. [2022-11-16 12:02:35,667 INFO L231 Difference]: Finished difference. Result has 173 places, 207 transitions, 2657 flow [2022-11-16 12:02:35,668 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2047, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2657, PETRI_PLACES=173, PETRI_TRANSITIONS=207} [2022-11-16 12:02:35,669 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 96 predicate places. [2022-11-16 12:02:35,669 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 207 transitions, 2657 flow [2022-11-16 12:02:35,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:35,669 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:02:35,669 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:35,682 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-16 12:02:35,875 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2022-11-16 12:02:35,876 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:02:35,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:35,876 INFO L85 PathProgramCache]: Analyzing trace with hash -1249889045, now seen corresponding path program 4 times [2022-11-16 12:02:35,876 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:35,876 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59719186] [2022-11-16 12:02:35,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:35,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:35,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:35,926 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:35,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:35,926 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59719186] [2022-11-16 12:02:35,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59719186] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:02:35,926 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:02:35,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:02:35,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [590989501] [2022-11-16 12:02:35,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:02:35,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:02:35,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:35,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:02:35,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:02:35,929 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-11-16 12:02:35,929 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 207 transitions, 2657 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:35,929 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:02:35,929 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-11-16 12:02:35,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:02:36,272 INFO L130 PetriNetUnfolder]: 239/785 cut-off events. [2022-11-16 12:02:36,272 INFO L131 PetriNetUnfolder]: For 8136/8159 co-relation queries the response was YES. [2022-11-16 12:02:36,279 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3748 conditions, 785 events. 239/785 cut-off events. For 8136/8159 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 4865 event pairs, 46 based on Foata normal form. 5/781 useless extension candidates. Maximal degree in co-relation 3701. Up to 182 conditions per place. [2022-11-16 12:02:36,284 INFO L137 encePairwiseOnDemand]: 79/87 looper letters, 137 selfloop transitions, 54 changer transitions 5/245 dead transitions. [2022-11-16 12:02:36,284 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 245 transitions, 3361 flow [2022-11-16 12:02:36,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:02:36,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-16 12:02:36,285 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 554 transitions. [2022-11-16 12:02:36,286 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7959770114942529 [2022-11-16 12:02:36,286 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 554 transitions. [2022-11-16 12:02:36,286 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 554 transitions. [2022-11-16 12:02:36,287 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:02:36,287 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 554 transitions. [2022-11-16 12:02:36,288 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 69.25) internal successors, (554), 8 states have internal predecessors, (554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:36,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:36,289 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:36,290 INFO L175 Difference]: Start difference. First operand has 173 places, 207 transitions, 2657 flow. Second operand 8 states and 554 transitions. [2022-11-16 12:02:36,290 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 245 transitions, 3361 flow [2022-11-16 12:02:36,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 245 transitions, 3272 flow, removed 21 selfloop flow, removed 4 redundant places. [2022-11-16 12:02:36,335 INFO L231 Difference]: Finished difference. Result has 178 places, 212 transitions, 2843 flow [2022-11-16 12:02:36,335 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2520, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=2843, PETRI_PLACES=178, PETRI_TRANSITIONS=212} [2022-11-16 12:02:36,340 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 101 predicate places. [2022-11-16 12:02:36,340 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 212 transitions, 2843 flow [2022-11-16 12:02:36,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:36,341 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:02:36,341 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:36,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2022-11-16 12:02:36,342 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:02:36,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:36,342 INFO L85 PathProgramCache]: Analyzing trace with hash 1327072255, now seen corresponding path program 5 times [2022-11-16 12:02:36,342 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:36,342 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707975069] [2022-11-16 12:02:36,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:36,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:36,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:36,391 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:36,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:36,392 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707975069] [2022-11-16 12:02:36,392 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707975069] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:02:36,392 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:02:36,392 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:02:36,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348248315] [2022-11-16 12:02:36,393 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:02:36,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:02:36,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:36,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:02:36,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:02:36,395 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-11-16 12:02:36,395 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 212 transitions, 2843 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:36,395 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:02:36,395 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-11-16 12:02:36,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:02:36,724 INFO L130 PetriNetUnfolder]: 246/769 cut-off events. [2022-11-16 12:02:36,724 INFO L131 PetriNetUnfolder]: For 9295/9308 co-relation queries the response was YES. [2022-11-16 12:02:36,731 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3856 conditions, 769 events. 246/769 cut-off events. For 9295/9308 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4612 event pairs, 48 based on Foata normal form. 8/768 useless extension candidates. Maximal degree in co-relation 3807. Up to 190 conditions per place. [2022-11-16 12:02:36,738 INFO L137 encePairwiseOnDemand]: 79/87 looper letters, 118 selfloop transitions, 92 changer transitions 2/261 dead transitions. [2022-11-16 12:02:36,738 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 261 transitions, 3773 flow [2022-11-16 12:02:36,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:02:36,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-16 12:02:36,739 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 568 transitions. [2022-11-16 12:02:36,740 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8160919540229885 [2022-11-16 12:02:36,740 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 568 transitions. [2022-11-16 12:02:36,740 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 568 transitions. [2022-11-16 12:02:36,741 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:02:36,741 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 568 transitions. [2022-11-16 12:02:36,742 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 71.0) internal successors, (568), 8 states have internal predecessors, (568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:36,744 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:36,744 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:36,744 INFO L175 Difference]: Start difference. First operand has 178 places, 212 transitions, 2843 flow. Second operand 8 states and 568 transitions. [2022-11-16 12:02:36,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 261 transitions, 3773 flow [2022-11-16 12:02:36,784 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 174 places, 261 transitions, 3658 flow, removed 17 selfloop flow, removed 9 redundant places. [2022-11-16 12:02:36,789 INFO L231 Difference]: Finished difference. Result has 178 places, 222 transitions, 3252 flow [2022-11-16 12:02:36,789 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2577, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=203, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3252, PETRI_PLACES=178, PETRI_TRANSITIONS=222} [2022-11-16 12:02:36,792 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 101 predicate places. [2022-11-16 12:02:36,792 INFO L495 AbstractCegarLoop]: Abstraction has has 178 places, 222 transitions, 3252 flow [2022-11-16 12:02:36,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:36,792 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:02:36,793 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:36,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2022-11-16 12:02:36,793 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:02:36,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:36,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1183988775, now seen corresponding path program 4 times [2022-11-16 12:02:36,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:36,794 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334093216] [2022-11-16 12:02:36,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:36,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:36,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:36,843 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:36,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:36,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334093216] [2022-11-16 12:02:36,844 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334093216] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:02:36,844 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724642437] [2022-11-16 12:02:36,845 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:02:36,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:02:36,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:02:36,846 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:02:36,876 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-16 12:02:36,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:02:36,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:02:36,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-16 12:02:36,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:02:36,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:36,982 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:02:37,026 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:37,027 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724642437] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-16 12:02:37,027 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-16 12:02:37,027 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5, 5] total 7 [2022-11-16 12:02:37,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348221286] [2022-11-16 12:02:37,028 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:02:37,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:02:37,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:37,029 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:02:37,029 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2022-11-16 12:02:37,029 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-11-16 12:02:37,030 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 178 places, 222 transitions, 3252 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:37,030 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:02:37,030 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-11-16 12:02:37,030 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:02:37,292 INFO L130 PetriNetUnfolder]: 230/712 cut-off events. [2022-11-16 12:02:37,292 INFO L131 PetriNetUnfolder]: For 10488/10488 co-relation queries the response was YES. [2022-11-16 12:02:37,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3772 conditions, 712 events. 230/712 cut-off events. For 10488/10488 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 4075 event pairs, 47 based on Foata normal form. 8/715 useless extension candidates. Maximal degree in co-relation 3725. Up to 229 conditions per place. [2022-11-16 12:02:37,303 INFO L137 encePairwiseOnDemand]: 78/87 looper letters, 131 selfloop transitions, 67 changer transitions 0/247 dead transitions. [2022-11-16 12:02:37,303 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 183 places, 247 transitions, 3814 flow [2022-11-16 12:02:37,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2022-11-16 12:02:37,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2022-11-16 12:02:37,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 426 transitions. [2022-11-16 12:02:37,305 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8160919540229885 [2022-11-16 12:02:37,305 INFO L72 ComplementDD]: Start complementDD. Operand 6 states and 426 transitions. [2022-11-16 12:02:37,305 INFO L73 IsDeterministic]: Start isDeterministic. Operand 6 states and 426 transitions. [2022-11-16 12:02:37,306 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:02:37,306 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 6 states and 426 transitions. [2022-11-16 12:02:37,307 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 7 states, 6 states have (on average 71.0) internal successors, (426), 6 states have internal predecessors, (426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:37,308 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:37,308 INFO L81 ComplementDD]: Finished complementDD. Result has 7 states, 7 states have (on average 87.0) internal successors, (609), 7 states have internal predecessors, (609), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:37,308 INFO L175 Difference]: Start difference. First operand has 178 places, 222 transitions, 3252 flow. Second operand 6 states and 426 transitions. [2022-11-16 12:02:37,309 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 183 places, 247 transitions, 3814 flow [2022-11-16 12:02:37,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 247 transitions, 3783 flow, removed 6 selfloop flow, removed 1 redundant places. [2022-11-16 12:02:37,351 INFO L231 Difference]: Finished difference. Result has 184 places, 221 transitions, 3383 flow [2022-11-16 12:02:37,351 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=3101, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3383, PETRI_PLACES=184, PETRI_TRANSITIONS=221} [2022-11-16 12:02:37,352 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 107 predicate places. [2022-11-16 12:02:37,352 INFO L495 AbstractCegarLoop]: Abstraction has has 184 places, 221 transitions, 3383 flow [2022-11-16 12:02:37,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:37,353 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:02:37,353 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:37,363 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-16 12:02:37,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:02:37,559 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:02:37,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:37,559 INFO L85 PathProgramCache]: Analyzing trace with hash 722837219, now seen corresponding path program 5 times [2022-11-16 12:02:37,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:37,559 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067033433] [2022-11-16 12:02:37,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:37,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:37,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:37,613 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:37,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:37,613 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067033433] [2022-11-16 12:02:37,613 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067033433] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:02:37,613 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:02:37,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:02:37,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798264910] [2022-11-16 12:02:37,614 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:02:37,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:02:37,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:37,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:02:37,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:02:37,616 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-11-16 12:02:37,616 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 221 transitions, 3383 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:37,616 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:02:37,616 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-11-16 12:02:37,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:02:37,855 INFO L130 PetriNetUnfolder]: 225/705 cut-off events. [2022-11-16 12:02:37,855 INFO L131 PetriNetUnfolder]: For 11281/11283 co-relation queries the response was YES. [2022-11-16 12:02:37,860 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3866 conditions, 705 events. 225/705 cut-off events. For 11281/11283 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 4046 event pairs, 60 based on Foata normal form. 3/699 useless extension candidates. Maximal degree in co-relation 3817. Up to 195 conditions per place. [2022-11-16 12:02:37,865 INFO L137 encePairwiseOnDemand]: 81/87 looper letters, 151 selfloop transitions, 33 changer transitions 5/238 dead transitions. [2022-11-16 12:02:37,865 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 190 places, 238 transitions, 3813 flow [2022-11-16 12:02:37,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:02:37,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 12:02:37,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 483 transitions. [2022-11-16 12:02:37,867 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7931034482758621 [2022-11-16 12:02:37,867 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 483 transitions. [2022-11-16 12:02:37,867 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 483 transitions. [2022-11-16 12:02:37,867 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:02:37,868 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 483 transitions. [2022-11-16 12:02:37,869 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 69.0) internal successors, (483), 7 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:37,870 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:37,870 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:37,870 INFO L175 Difference]: Start difference. First operand has 184 places, 221 transitions, 3383 flow. Second operand 7 states and 483 transitions. [2022-11-16 12:02:37,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 190 places, 238 transitions, 3813 flow [2022-11-16 12:02:37,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 238 transitions, 3762 flow, removed 9 selfloop flow, removed 1 redundant places. [2022-11-16 12:02:37,915 INFO L231 Difference]: Finished difference. Result has 190 places, 216 transitions, 3241 flow [2022-11-16 12:02:37,916 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=3249, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=218, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3241, PETRI_PLACES=190, PETRI_TRANSITIONS=216} [2022-11-16 12:02:37,916 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 113 predicate places. [2022-11-16 12:02:37,916 INFO L495 AbstractCegarLoop]: Abstraction has has 190 places, 216 transitions, 3241 flow [2022-11-16 12:02:37,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:37,917 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:02:37,917 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:37,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2022-11-16 12:02:37,918 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:02:37,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:37,918 INFO L85 PathProgramCache]: Analyzing trace with hash -716007245, now seen corresponding path program 6 times [2022-11-16 12:02:37,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:37,919 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535077278] [2022-11-16 12:02:37,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:37,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:37,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:37,970 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:37,970 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:37,970 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535077278] [2022-11-16 12:02:37,971 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535077278] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:02:37,971 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:02:37,971 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:02:37,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694684139] [2022-11-16 12:02:37,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:02:37,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:02:37,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:37,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:02:37,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:02:37,973 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-11-16 12:02:37,974 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 190 places, 216 transitions, 3241 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:37,974 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:02:37,974 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-11-16 12:02:37,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:02:38,247 INFO L130 PetriNetUnfolder]: 213/644 cut-off events. [2022-11-16 12:02:38,247 INFO L131 PetriNetUnfolder]: For 10624/10626 co-relation queries the response was YES. [2022-11-16 12:02:38,254 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3591 conditions, 644 events. 213/644 cut-off events. For 10624/10626 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 3502 event pairs, 52 based on Foata normal form. 2/637 useless extension candidates. Maximal degree in co-relation 3541. Up to 195 conditions per place. [2022-11-16 12:02:38,259 INFO L137 encePairwiseOnDemand]: 79/87 looper letters, 124 selfloop transitions, 49 changer transitions 2/224 dead transitions. [2022-11-16 12:02:38,259 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 193 places, 224 transitions, 3508 flow [2022-11-16 12:02:38,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-16 12:02:38,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-16 12:02:38,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 550 transitions. [2022-11-16 12:02:38,262 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7902298850574713 [2022-11-16 12:02:38,263 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 550 transitions. [2022-11-16 12:02:38,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 550 transitions. [2022-11-16 12:02:38,264 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:02:38,264 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 550 transitions. [2022-11-16 12:02:38,265 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 68.75) internal successors, (550), 8 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:38,267 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:38,267 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 87.0) internal successors, (783), 9 states have internal predecessors, (783), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:38,267 INFO L175 Difference]: Start difference. First operand has 190 places, 216 transitions, 3241 flow. Second operand 8 states and 550 transitions. [2022-11-16 12:02:38,268 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 193 places, 224 transitions, 3508 flow [2022-11-16 12:02:38,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 189 places, 224 transitions, 3422 flow, removed 9 selfloop flow, removed 4 redundant places. [2022-11-16 12:02:38,314 INFO L231 Difference]: Finished difference. Result has 189 places, 202 transitions, 3029 flow [2022-11-16 12:02:38,315 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2957, PETRI_DIFFERENCE_MINUEND_PLACES=182, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=204, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=155, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3029, PETRI_PLACES=189, PETRI_TRANSITIONS=202} [2022-11-16 12:02:38,318 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 112 predicate places. [2022-11-16 12:02:38,318 INFO L495 AbstractCegarLoop]: Abstraction has has 189 places, 202 transitions, 3029 flow [2022-11-16 12:02:38,318 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:38,319 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:02:38,319 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:38,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2022-11-16 12:02:38,319 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:02:38,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:38,320 INFO L85 PathProgramCache]: Analyzing trace with hash 1936559719, now seen corresponding path program 6 times [2022-11-16 12:02:38,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:38,321 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616476464] [2022-11-16 12:02:38,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:38,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:38,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:38,371 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:38,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:38,372 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616476464] [2022-11-16 12:02:38,372 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616476464] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-16 12:02:38,372 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-16 12:02:38,372 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2022-11-16 12:02:38,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [533733228] [2022-11-16 12:02:38,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-16 12:02:38,373 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2022-11-16 12:02:38,373 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:38,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2022-11-16 12:02:38,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2022-11-16 12:02:38,374 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 61 out of 87 [2022-11-16 12:02:38,375 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 202 transitions, 3029 flow. Second operand has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:38,375 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:02:38,375 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 61 of 87 [2022-11-16 12:02:38,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:02:38,599 INFO L130 PetriNetUnfolder]: 196/570 cut-off events. [2022-11-16 12:02:38,599 INFO L131 PetriNetUnfolder]: For 9943/9945 co-relation queries the response was YES. [2022-11-16 12:02:38,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3318 conditions, 570 events. 196/570 cut-off events. For 9943/9945 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 2895 event pairs, 39 based on Foata normal form. 3/567 useless extension candidates. Maximal degree in co-relation 3269. Up to 190 conditions per place. [2022-11-16 12:02:38,608 INFO L137 encePairwiseOnDemand]: 79/87 looper letters, 109 selfloop transitions, 45 changer transitions 3/206 dead transitions. [2022-11-16 12:02:38,608 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 206 transitions, 3219 flow [2022-11-16 12:02:38,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2022-11-16 12:02:38,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2022-11-16 12:02:38,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 480 transitions. [2022-11-16 12:02:38,610 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.7881773399014779 [2022-11-16 12:02:38,611 INFO L72 ComplementDD]: Start complementDD. Operand 7 states and 480 transitions. [2022-11-16 12:02:38,611 INFO L73 IsDeterministic]: Start isDeterministic. Operand 7 states and 480 transitions. [2022-11-16 12:02:38,611 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:02:38,611 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 7 states and 480 transitions. [2022-11-16 12:02:38,612 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 8 states, 7 states have (on average 68.57142857142857) internal successors, (480), 7 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:38,613 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:38,614 INFO L81 ComplementDD]: Finished complementDD. Result has 8 states, 8 states have (on average 87.0) internal successors, (696), 8 states have internal predecessors, (696), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:38,614 INFO L175 Difference]: Start difference. First operand has 189 places, 202 transitions, 3029 flow. Second operand 7 states and 480 transitions. [2022-11-16 12:02:38,614 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 206 transitions, 3219 flow [2022-11-16 12:02:38,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 206 transitions, 3107 flow, removed 10 selfloop flow, removed 10 redundant places. [2022-11-16 12:02:38,652 INFO L231 Difference]: Finished difference. Result has 179 places, 188 transitions, 2779 flow [2022-11-16 12:02:38,652 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2717, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=190, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=145, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2779, PETRI_PLACES=179, PETRI_TRANSITIONS=188} [2022-11-16 12:02:38,653 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 102 predicate places. [2022-11-16 12:02:38,653 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 188 transitions, 2779 flow [2022-11-16 12:02:38,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 64.6) internal successors, (323), 5 states have internal predecessors, (323), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:38,653 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:02:38,654 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:38,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2022-11-16 12:02:38,654 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:02:38,655 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:38,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1114847643, now seen corresponding path program 1 times [2022-11-16 12:02:38,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:38,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2007591293] [2022-11-16 12:02:38,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:38,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:38,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:39,006 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:39,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:39,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2007591293] [2022-11-16 12:02:39,006 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2007591293] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:02:39,006 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976728187] [2022-11-16 12:02:39,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:39,007 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:02:39,007 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:02:39,012 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:02:39,035 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-16 12:02:39,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:39,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:02:39,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:02:39,638 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:39,638 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:02:40,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:40,424 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976728187] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:02:40,425 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:02:40,425 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-11-16 12:02:40,425 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1042908404] [2022-11-16 12:02:40,425 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:02:40,426 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 12:02:40,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:40,427 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 12:02:40,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=981, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 12:02:40,430 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-11-16 12:02:40,432 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 188 transitions, 2779 flow. Second operand has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:40,432 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:02:40,432 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-11-16 12:02:40,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:02:56,041 INFO L130 PetriNetUnfolder]: 972/2270 cut-off events. [2022-11-16 12:02:56,041 INFO L131 PetriNetUnfolder]: For 37612/37612 co-relation queries the response was YES. [2022-11-16 12:02:56,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13607 conditions, 2270 events. 972/2270 cut-off events. For 37612/37612 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 15354 event pairs, 39 based on Foata normal form. 3/2257 useless extension candidates. Maximal degree in co-relation 13560. Up to 363 conditions per place. [2022-11-16 12:02:56,090 INFO L137 encePairwiseOnDemand]: 64/87 looper letters, 247 selfloop transitions, 856 changer transitions 17/1159 dead transitions. [2022-11-16 12:02:56,090 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 1159 transitions, 18153 flow [2022-11-16 12:02:56,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 224 states. [2022-11-16 12:02:56,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 224 states. [2022-11-16 12:02:56,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 11784 transitions. [2022-11-16 12:02:56,119 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.604679802955665 [2022-11-16 12:02:56,119 INFO L72 ComplementDD]: Start complementDD. Operand 224 states and 11784 transitions. [2022-11-16 12:02:56,119 INFO L73 IsDeterministic]: Start isDeterministic. Operand 224 states and 11784 transitions. [2022-11-16 12:02:56,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:02:56,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 224 states and 11784 transitions. [2022-11-16 12:02:56,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 225 states, 224 states have (on average 52.607142857142854) internal successors, (11784), 224 states have internal predecessors, (11784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:56,192 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 225 states, 225 states have (on average 87.0) internal successors, (19575), 225 states have internal predecessors, (19575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:56,200 INFO L81 ComplementDD]: Finished complementDD. Result has 225 states, 225 states have (on average 87.0) internal successors, (19575), 225 states have internal predecessors, (19575), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:56,200 INFO L175 Difference]: Start difference. First operand has 179 places, 188 transitions, 2779 flow. Second operand 224 states and 11784 transitions. [2022-11-16 12:02:56,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 1159 transitions, 18153 flow [2022-11-16 12:02:56,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 386 places, 1159 transitions, 17303 flow, removed 0 selfloop flow, removed 10 redundant places. [2022-11-16 12:02:56,335 INFO L231 Difference]: Finished difference. Result has 448 places, 990 transitions, 16193 flow [2022-11-16 12:02:56,335 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=2581, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=188, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=224, PETRI_FLOW=16193, PETRI_PLACES=448, PETRI_TRANSITIONS=990} [2022-11-16 12:02:56,336 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 371 predicate places. [2022-11-16 12:02:56,336 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 990 transitions, 16193 flow [2022-11-16 12:02:56,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:56,336 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:02:56,336 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:02:56,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-16 12:02:56,537 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:02:56,537 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:02:56,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:02:56,538 INFO L85 PathProgramCache]: Analyzing trace with hash 1415311341, now seen corresponding path program 2 times [2022-11-16 12:02:56,538 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:02:56,538 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [877887020] [2022-11-16 12:02:56,538 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:02:56,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:02:56,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:02:56,867 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:56,867 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:02:56,867 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [877887020] [2022-11-16 12:02:56,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [877887020] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:02:56,868 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84872204] [2022-11-16 12:02:56,868 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:02:56,868 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:02:56,868 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:02:56,872 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:02:56,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-16 12:02:56,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:02:56,963 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:02:56,965 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:02:56,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:02:57,391 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:57,391 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:02:58,206 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:02:58,206 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [84872204] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:02:58,207 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:02:58,207 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-11-16 12:02:58,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926865708] [2022-11-16 12:02:58,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:02:58,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 12:02:58,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:02:58,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 12:02:58,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 12:02:58,211 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-11-16 12:02:58,213 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 990 transitions, 16193 flow. Second operand has 34 states, 34 states have (on average 50.73529411764706) internal successors, (1725), 34 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:02:58,214 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:02:58,214 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-11-16 12:02:58,214 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:03:03,111 INFO L130 PetriNetUnfolder]: 1106/2980 cut-off events. [2022-11-16 12:03:03,111 INFO L131 PetriNetUnfolder]: For 138750/138750 co-relation queries the response was YES. [2022-11-16 12:03:03,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24559 conditions, 2980 events. 1106/2980 cut-off events. For 138750/138750 co-relation queries the response was YES. Maximal size of possible extension queue 187. Compared 24173 event pairs, 46 based on Foata normal form. 1/2968 useless extension candidates. Maximal degree in co-relation 24451. Up to 439 conditions per place. [2022-11-16 12:03:03,184 INFO L137 encePairwiseOnDemand]: 67/87 looper letters, 360 selfloop transitions, 763 changer transitions 45/1207 dead transitions. [2022-11-16 12:03:03,185 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 503 places, 1207 transitions, 23297 flow [2022-11-16 12:03:03,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2022-11-16 12:03:03,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2022-11-16 12:03:03,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 3489 transitions. [2022-11-16 12:03:03,191 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6266163793103449 [2022-11-16 12:03:03,191 INFO L72 ComplementDD]: Start complementDD. Operand 64 states and 3489 transitions. [2022-11-16 12:03:03,191 INFO L73 IsDeterministic]: Start isDeterministic. Operand 64 states and 3489 transitions. [2022-11-16 12:03:03,193 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:03:03,193 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 64 states and 3489 transitions. [2022-11-16 12:03:03,199 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 65 states, 64 states have (on average 54.515625) internal successors, (3489), 64 states have internal predecessors, (3489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:03,210 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 65 states, 65 states have (on average 87.0) internal successors, (5655), 65 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:03,213 INFO L81 ComplementDD]: Finished complementDD. Result has 65 states, 65 states have (on average 87.0) internal successors, (5655), 65 states have internal predecessors, (5655), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:03,213 INFO L175 Difference]: Start difference. First operand has 448 places, 990 transitions, 16193 flow. Second operand 64 states and 3489 transitions. [2022-11-16 12:03:03,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 503 places, 1207 transitions, 23297 flow [2022-11-16 12:03:04,003 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 488 places, 1207 transitions, 21727 flow, removed 512 selfloop flow, removed 15 redundant places. [2022-11-16 12:03:04,037 INFO L231 Difference]: Finished difference. Result has 508 places, 1036 transitions, 17562 flow [2022-11-16 12:03:04,038 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=14838, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=990, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=723, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=259, PETRI_DIFFERENCE_SUBTRAHEND_STATES=64, PETRI_FLOW=17562, PETRI_PLACES=508, PETRI_TRANSITIONS=1036} [2022-11-16 12:03:04,038 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 431 predicate places. [2022-11-16 12:03:04,039 INFO L495 AbstractCegarLoop]: Abstraction has has 508 places, 1036 transitions, 17562 flow [2022-11-16 12:03:04,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.73529411764706) internal successors, (1725), 34 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:04,039 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:03:04,040 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:03:04,049 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-16 12:03:04,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2022-11-16 12:03:04,241 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:03:04,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:03:04,242 INFO L85 PathProgramCache]: Analyzing trace with hash -964687289, now seen corresponding path program 3 times [2022-11-16 12:03:04,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:03:04,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281462450] [2022-11-16 12:03:04,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:03:04,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:03:04,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:04,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:03:04,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:03:04,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281462450] [2022-11-16 12:03:04,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281462450] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:03:04,615 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329064973] [2022-11-16 12:03:04,615 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:03:04,615 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:03:04,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:03:04,620 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:03:04,651 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-16 12:03:04,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 12:03:04,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:03:04,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:03:04,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:03:05,164 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:03:05,164 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:03:05,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:03:05,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329064973] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:03:05,896 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:03:05,896 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-11-16 12:03:05,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721469959] [2022-11-16 12:03:05,896 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:03:05,897 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 12:03:05,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:03:05,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 12:03:05,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=983, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 12:03:05,899 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-11-16 12:03:05,901 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 508 places, 1036 transitions, 17562 flow. Second operand has 34 states, 34 states have (on average 50.85294117647059) internal successors, (1729), 34 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:05,901 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:03:05,901 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-11-16 12:03:05,901 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:03:10,389 INFO L130 PetriNetUnfolder]: 1087/2972 cut-off events. [2022-11-16 12:03:10,389 INFO L131 PetriNetUnfolder]: For 158462/158462 co-relation queries the response was YES. [2022-11-16 12:03:10,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25697 conditions, 2972 events. 1087/2972 cut-off events. For 158462/158462 co-relation queries the response was YES. Maximal size of possible extension queue 192. Compared 24315 event pairs, 60 based on Foata normal form. 2/2947 useless extension candidates. Maximal degree in co-relation 25580. Up to 415 conditions per place. [2022-11-16 12:03:10,452 INFO L137 encePairwiseOnDemand]: 67/87 looper letters, 339 selfloop transitions, 775 changer transitions 31/1184 dead transitions. [2022-11-16 12:03:10,452 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 564 places, 1184 transitions, 23458 flow [2022-11-16 12:03:10,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 66 states. [2022-11-16 12:03:10,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2022-11-16 12:03:10,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 3577 transitions. [2022-11-16 12:03:10,459 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6229536746778126 [2022-11-16 12:03:10,459 INFO L72 ComplementDD]: Start complementDD. Operand 66 states and 3577 transitions. [2022-11-16 12:03:10,459 INFO L73 IsDeterministic]: Start isDeterministic. Operand 66 states and 3577 transitions. [2022-11-16 12:03:10,461 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:03:10,461 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 66 states and 3577 transitions. [2022-11-16 12:03:10,468 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 67 states, 66 states have (on average 54.196969696969695) internal successors, (3577), 66 states have internal predecessors, (3577), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:10,475 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 67 states, 67 states have (on average 87.0) internal successors, (5829), 67 states have internal predecessors, (5829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:10,478 INFO L81 ComplementDD]: Finished complementDD. Result has 67 states, 67 states have (on average 87.0) internal successors, (5829), 67 states have internal predecessors, (5829), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:10,478 INFO L175 Difference]: Start difference. First operand has 508 places, 1036 transitions, 17562 flow. Second operand 66 states and 3577 transitions. [2022-11-16 12:03:10,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 564 places, 1184 transitions, 23458 flow [2022-11-16 12:03:11,256 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 1184 transitions, 21690 flow, removed 165 selfloop flow, removed 43 redundant places. [2022-11-16 12:03:11,279 INFO L231 Difference]: Finished difference. Result has 538 places, 1053 transitions, 18083 flow [2022-11-16 12:03:11,281 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=15907, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1036, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=759, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=272, PETRI_DIFFERENCE_SUBTRAHEND_STATES=66, PETRI_FLOW=18083, PETRI_PLACES=538, PETRI_TRANSITIONS=1053} [2022-11-16 12:03:11,281 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 461 predicate places. [2022-11-16 12:03:11,281 INFO L495 AbstractCegarLoop]: Abstraction has has 538 places, 1053 transitions, 18083 flow [2022-11-16 12:03:11,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.85294117647059) internal successors, (1729), 34 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:11,282 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:03:11,282 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:03:11,297 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2022-11-16 12:03:11,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2022-11-16 12:03:11,489 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:03:11,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:03:11,490 INFO L85 PathProgramCache]: Analyzing trace with hash -854241643, now seen corresponding path program 4 times [2022-11-16 12:03:11,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:03:11,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1284175628] [2022-11-16 12:03:11,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:03:11,490 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:03:11,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:11,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:03:11,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:03:11,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1284175628] [2022-11-16 12:03:11,935 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1284175628] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:03:11,935 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093941281] [2022-11-16 12:03:11,935 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:03:11,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:03:11,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:03:11,940 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:03:11,974 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-16 12:03:12,040 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:03:12,041 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:03:12,043 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 12:03:12,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:03:12,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:03:12,538 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:03:13,032 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:03:13,032 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093941281] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:03:13,032 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:03:13,032 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-11-16 12:03:13,033 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896890450] [2022-11-16 12:03:13,033 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:03:13,033 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-16 12:03:13,033 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:03:13,034 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-16 12:03:13,034 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 12:03:13,096 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-11-16 12:03:13,098 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 538 places, 1053 transitions, 18083 flow. Second operand has 33 states, 33 states have (on average 50.90909090909091) internal successors, (1680), 33 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:13,098 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:03:13,099 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-11-16 12:03:13,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:03:15,999 INFO L130 PetriNetUnfolder]: 1074/2983 cut-off events. [2022-11-16 12:03:15,999 INFO L131 PetriNetUnfolder]: For 167419/167419 co-relation queries the response was YES. [2022-11-16 12:03:16,029 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26015 conditions, 2983 events. 1074/2983 cut-off events. For 167419/167419 co-relation queries the response was YES. Maximal size of possible extension queue 190. Compared 24638 event pairs, 96 based on Foata normal form. 3/2958 useless extension candidates. Maximal degree in co-relation 25890. Up to 461 conditions per place. [2022-11-16 12:03:16,058 INFO L137 encePairwiseOnDemand]: 69/87 looper letters, 657 selfloop transitions, 455 changer transitions 16/1167 dead transitions. [2022-11-16 12:03:16,059 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 562 places, 1167 transitions, 23178 flow [2022-11-16 12:03:16,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-16 12:03:16,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-11-16 12:03:16,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 2009 transitions. [2022-11-16 12:03:16,063 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6414431673052363 [2022-11-16 12:03:16,063 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 2009 transitions. [2022-11-16 12:03:16,063 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 2009 transitions. [2022-11-16 12:03:16,064 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:03:16,064 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 2009 transitions. [2022-11-16 12:03:16,068 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 55.80555555555556) internal successors, (2009), 36 states have internal predecessors, (2009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:16,071 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 87.0) internal successors, (3219), 37 states have internal predecessors, (3219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:16,072 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 87.0) internal successors, (3219), 37 states have internal predecessors, (3219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:16,072 INFO L175 Difference]: Start difference. First operand has 538 places, 1053 transitions, 18083 flow. Second operand 36 states and 2009 transitions. [2022-11-16 12:03:16,073 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 562 places, 1167 transitions, 23178 flow [2022-11-16 12:03:16,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 511 places, 1167 transitions, 21484 flow, removed 130 selfloop flow, removed 51 redundant places. [2022-11-16 12:03:17,007 INFO L231 Difference]: Finished difference. Result has 518 places, 1068 transitions, 17703 flow [2022-11-16 12:03:17,008 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=16511, PETRI_DIFFERENCE_MINUEND_PLACES=476, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1053, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=440, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=606, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=17703, PETRI_PLACES=518, PETRI_TRANSITIONS=1068} [2022-11-16 12:03:17,009 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 441 predicate places. [2022-11-16 12:03:17,009 INFO L495 AbstractCegarLoop]: Abstraction has has 518 places, 1068 transitions, 17703 flow [2022-11-16 12:03:17,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.90909090909091) internal successors, (1680), 33 states have internal predecessors, (1680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:17,010 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:03:17,010 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:03:17,020 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2022-11-16 12:03:17,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2022-11-16 12:03:17,216 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:03:17,217 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:03:17,217 INFO L85 PathProgramCache]: Analyzing trace with hash 224014263, now seen corresponding path program 5 times [2022-11-16 12:03:17,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:03:17,217 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815025082] [2022-11-16 12:03:17,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:03:17,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:03:17,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:17,650 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:03:17,650 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:03:17,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815025082] [2022-11-16 12:03:17,650 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1815025082] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:03:17,650 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [620850408] [2022-11-16 12:03:17,651 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:03:17,651 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:03:17,651 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:03:17,652 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:03:17,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-16 12:03:17,737 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:03:17,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:03:17,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:03:17,741 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:03:18,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:03:18,163 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:03:18,714 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:03:18,715 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [620850408] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:03:18,715 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:03:18,715 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-11-16 12:03:18,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2008173418] [2022-11-16 12:03:18,715 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:03:18,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-16 12:03:18,716 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:03:18,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-16 12:03:18,717 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=939, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 12:03:18,719 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-11-16 12:03:18,721 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 518 places, 1068 transitions, 17703 flow. Second operand has 33 states, 33 states have (on average 50.84848484848485) internal successors, (1678), 33 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:18,721 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:03:18,721 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-11-16 12:03:18,721 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:03:22,036 INFO L130 PetriNetUnfolder]: 1137/3117 cut-off events. [2022-11-16 12:03:22,036 INFO L131 PetriNetUnfolder]: For 164410/164410 co-relation queries the response was YES. [2022-11-16 12:03:22,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26780 conditions, 3117 events. 1137/3117 cut-off events. For 164410/164410 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 26117 event pairs, 70 based on Foata normal form. 2/3078 useless extension candidates. Maximal degree in co-relation 26658. Up to 616 conditions per place. [2022-11-16 12:03:22,123 INFO L137 encePairwiseOnDemand]: 69/87 looper letters, 315 selfloop transitions, 904 changer transitions 21/1279 dead transitions. [2022-11-16 12:03:22,123 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 559 places, 1279 transitions, 24408 flow [2022-11-16 12:03:22,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-16 12:03:22,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-16 12:03:22,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2441 transitions. [2022-11-16 12:03:22,129 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6234993614303959 [2022-11-16 12:03:22,130 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2441 transitions. [2022-11-16 12:03:22,130 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2441 transitions. [2022-11-16 12:03:22,131 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:03:22,131 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2441 transitions. [2022-11-16 12:03:22,137 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 54.24444444444445) internal successors, (2441), 45 states have internal predecessors, (2441), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:22,142 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 87.0) internal successors, (4002), 46 states have internal predecessors, (4002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:22,143 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 87.0) internal successors, (4002), 46 states have internal predecessors, (4002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:22,143 INFO L175 Difference]: Start difference. First operand has 518 places, 1068 transitions, 17703 flow. Second operand 45 states and 2441 transitions. [2022-11-16 12:03:22,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 559 places, 1279 transitions, 24408 flow [2022-11-16 12:03:22,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 538 places, 1279 transitions, 23609 flow, removed 32 selfloop flow, removed 21 redundant places. [2022-11-16 12:03:22,967 INFO L231 Difference]: Finished difference. Result has 557 places, 1180 transitions, 21608 flow [2022-11-16 12:03:22,968 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=16952, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1068, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=786, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=249, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=21608, PETRI_PLACES=557, PETRI_TRANSITIONS=1180} [2022-11-16 12:03:22,969 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 480 predicate places. [2022-11-16 12:03:22,969 INFO L495 AbstractCegarLoop]: Abstraction has has 557 places, 1180 transitions, 21608 flow [2022-11-16 12:03:22,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.84848484848485) internal successors, (1678), 33 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:22,969 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:03:22,969 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:03:22,974 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2022-11-16 12:03:23,170 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2022-11-16 12:03:23,170 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:03:23,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:03:23,171 INFO L85 PathProgramCache]: Analyzing trace with hash 1185976805, now seen corresponding path program 6 times [2022-11-16 12:03:23,171 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:03:23,171 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616630020] [2022-11-16 12:03:23,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:03:23,171 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:03:23,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:23,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:03:23,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:03:23,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616630020] [2022-11-16 12:03:23,542 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616630020] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:03:23,542 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435973531] [2022-11-16 12:03:23,543 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:03:23,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:03:23,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:03:23,544 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:03:23,546 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-16 12:03:23,650 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-16 12:03:23,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:03:23,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:03:23,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:03:24,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:03:24,060 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:03:24,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:03:24,730 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [435973531] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:03:24,731 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:03:24,731 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-11-16 12:03:24,731 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181053702] [2022-11-16 12:03:24,731 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:03:24,732 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 12:03:24,732 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:03:24,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 12:03:24,733 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=149, Invalid=973, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 12:03:24,735 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-11-16 12:03:24,736 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 557 places, 1180 transitions, 21608 flow. Second operand has 34 states, 34 states have (on average 50.73529411764706) internal successors, (1725), 34 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:24,737 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:03:24,737 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-11-16 12:03:24,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:03:29,327 INFO L130 PetriNetUnfolder]: 1182/3299 cut-off events. [2022-11-16 12:03:29,327 INFO L131 PetriNetUnfolder]: For 188830/188830 co-relation queries the response was YES. [2022-11-16 12:03:29,370 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30156 conditions, 3299 events. 1182/3299 cut-off events. For 188830/188830 co-relation queries the response was YES. Maximal size of possible extension queue 200. Compared 27715 event pairs, 64 based on Foata normal form. 1/3272 useless extension candidates. Maximal degree in co-relation 30019. Up to 430 conditions per place. [2022-11-16 12:03:29,391 INFO L137 encePairwiseOnDemand]: 66/87 looper letters, 446 selfloop transitions, 865 changer transitions 39/1389 dead transitions. [2022-11-16 12:03:29,392 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 612 places, 1389 transitions, 30131 flow [2022-11-16 12:03:29,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-16 12:03:29,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-11-16 12:03:29,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3350 transitions. [2022-11-16 12:03:29,397 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6312417561710948 [2022-11-16 12:03:29,398 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3350 transitions. [2022-11-16 12:03:29,398 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3350 transitions. [2022-11-16 12:03:29,399 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:03:29,399 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3350 transitions. [2022-11-16 12:03:29,404 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 54.91803278688525) internal successors, (3350), 61 states have internal predecessors, (3350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:29,410 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 87.0) internal successors, (5394), 62 states have internal predecessors, (5394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:29,411 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 87.0) internal successors, (5394), 62 states have internal predecessors, (5394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:29,411 INFO L175 Difference]: Start difference. First operand has 557 places, 1180 transitions, 21608 flow. Second operand 61 states and 3350 transitions. [2022-11-16 12:03:29,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 612 places, 1389 transitions, 30131 flow [2022-11-16 12:03:30,528 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 597 places, 1389 transitions, 29577 flow, removed 182 selfloop flow, removed 15 redundant places. [2022-11-16 12:03:30,553 INFO L231 Difference]: Finished difference. Result has 616 places, 1225 transitions, 24478 flow [2022-11-16 12:03:30,554 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=21284, PETRI_DIFFERENCE_MINUEND_PLACES=537, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1180, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=795, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=24478, PETRI_PLACES=616, PETRI_TRANSITIONS=1225} [2022-11-16 12:03:30,555 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 539 predicate places. [2022-11-16 12:03:30,555 INFO L495 AbstractCegarLoop]: Abstraction has has 616 places, 1225 transitions, 24478 flow [2022-11-16 12:03:30,555 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.73529411764706) internal successors, (1725), 34 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:30,556 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:03:30,556 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:03:30,561 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-16 12:03:30,756 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2022-11-16 12:03:30,757 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:03:30,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:03:30,757 INFO L85 PathProgramCache]: Analyzing trace with hash 2039424553, now seen corresponding path program 7 times [2022-11-16 12:03:30,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:03:30,757 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [209498722] [2022-11-16 12:03:30,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:03:30,757 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:03:30,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:31,218 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:03:31,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:03:31,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [209498722] [2022-11-16 12:03:31,219 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [209498722] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:03:31,219 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1547177830] [2022-11-16 12:03:31,219 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 12:03:31,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:03:31,219 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:03:31,228 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:03:31,251 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-16 12:03:31,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:31,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:03:31,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:03:31,772 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:03:31,772 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:03:32,458 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:03:32,458 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1547177830] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:03:32,458 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:03:32,458 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-11-16 12:03:32,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305809682] [2022-11-16 12:03:32,458 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:03:32,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 12:03:32,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:03:32,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 12:03:32,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=983, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 12:03:32,462 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-11-16 12:03:32,464 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 616 places, 1225 transitions, 24478 flow. Second operand has 34 states, 34 states have (on average 50.8235294117647) internal successors, (1728), 34 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:32,464 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:03:32,465 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-11-16 12:03:32,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:03:43,224 INFO L130 PetriNetUnfolder]: 1198/3291 cut-off events. [2022-11-16 12:03:43,224 INFO L131 PetriNetUnfolder]: For 196984/196984 co-relation queries the response was YES. [2022-11-16 12:03:43,274 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31919 conditions, 3291 events. 1198/3291 cut-off events. For 196984/196984 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 27649 event pairs, 88 based on Foata normal form. 3/3252 useless extension candidates. Maximal degree in co-relation 31767. Up to 685 conditions per place. [2022-11-16 12:03:43,297 INFO L137 encePairwiseOnDemand]: 64/87 looper letters, 317 selfloop transitions, 1020 changer transitions 22/1398 dead transitions. [2022-11-16 12:03:43,297 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 755 places, 1398 transitions, 32296 flow [2022-11-16 12:03:43,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 151 states. [2022-11-16 12:03:43,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2022-11-16 12:03:43,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 7993 transitions. [2022-11-16 12:03:43,307 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6084341934992769 [2022-11-16 12:03:43,307 INFO L72 ComplementDD]: Start complementDD. Operand 151 states and 7993 transitions. [2022-11-16 12:03:43,307 INFO L73 IsDeterministic]: Start isDeterministic. Operand 151 states and 7993 transitions. [2022-11-16 12:03:43,311 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:03:43,311 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 151 states and 7993 transitions. [2022-11-16 12:03:43,323 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 152 states, 151 states have (on average 52.93377483443709) internal successors, (7993), 151 states have internal predecessors, (7993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:43,336 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 152 states, 152 states have (on average 87.0) internal successors, (13224), 152 states have internal predecessors, (13224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:43,339 INFO L81 ComplementDD]: Finished complementDD. Result has 152 states, 152 states have (on average 87.0) internal successors, (13224), 152 states have internal predecessors, (13224), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:43,339 INFO L175 Difference]: Start difference. First operand has 616 places, 1225 transitions, 24478 flow. Second operand 151 states and 7993 transitions. [2022-11-16 12:03:43,340 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 755 places, 1398 transitions, 32296 flow [2022-11-16 12:03:44,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 714 places, 1398 transitions, 31313 flow, removed 29 selfloop flow, removed 41 redundant places. [2022-11-16 12:03:44,964 INFO L231 Difference]: Finished difference. Result has 730 places, 1262 transitions, 26677 flow [2022-11-16 12:03:44,965 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=23591, PETRI_DIFFERENCE_MINUEND_PLACES=564, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1225, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=984, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=233, PETRI_DIFFERENCE_SUBTRAHEND_STATES=151, PETRI_FLOW=26677, PETRI_PLACES=730, PETRI_TRANSITIONS=1262} [2022-11-16 12:03:44,966 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 653 predicate places. [2022-11-16 12:03:44,966 INFO L495 AbstractCegarLoop]: Abstraction has has 730 places, 1262 transitions, 26677 flow [2022-11-16 12:03:44,966 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.8235294117647) internal successors, (1728), 34 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:44,967 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:03:44,967 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:03:44,974 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-16 12:03:45,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2022-11-16 12:03:45,173 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:03:45,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:03:45,174 INFO L85 PathProgramCache]: Analyzing trace with hash -1811834131, now seen corresponding path program 8 times [2022-11-16 12:03:45,174 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:03:45,174 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347618752] [2022-11-16 12:03:45,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:03:45,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:03:45,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:45,486 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:03:45,487 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:03:45,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347618752] [2022-11-16 12:03:45,487 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1347618752] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:03:45,487 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317490237] [2022-11-16 12:03:45,487 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:03:45,487 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:03:45,488 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:03:45,489 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:03:45,507 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-16 12:03:45,585 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:03:45,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:03:45,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:03:45,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:03:45,950 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:03:45,950 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:03:46,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:03:46,560 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [317490237] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:03:46,561 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:03:46,561 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-11-16 12:03:46,561 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [285895179] [2022-11-16 12:03:46,561 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:03:46,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 12:03:46,562 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:03:46,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 12:03:46,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=991, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 12:03:46,565 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-11-16 12:03:46,567 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 730 places, 1262 transitions, 26677 flow. Second operand has 34 states, 34 states have (on average 50.6764705882353) internal successors, (1723), 34 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:46,567 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:03:46,567 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-11-16 12:03:46,567 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:03:56,748 INFO L130 PetriNetUnfolder]: 1229/3366 cut-off events. [2022-11-16 12:03:56,748 INFO L131 PetriNetUnfolder]: For 208168/208168 co-relation queries the response was YES. [2022-11-16 12:03:56,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33914 conditions, 3366 events. 1229/3366 cut-off events. For 208168/208168 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 28525 event pairs, 97 based on Foata normal form. 3/3324 useless extension candidates. Maximal degree in co-relation 33756. Up to 775 conditions per place. [2022-11-16 12:03:56,810 INFO L137 encePairwiseOnDemand]: 65/87 looper letters, 288 selfloop transitions, 1054 changer transitions 28/1409 dead transitions. [2022-11-16 12:03:56,810 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 868 places, 1409 transitions, 33398 flow [2022-11-16 12:03:56,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 146 states. [2022-11-16 12:03:56,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2022-11-16 12:03:56,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 7707 transitions. [2022-11-16 12:03:56,820 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6067548417572036 [2022-11-16 12:03:56,820 INFO L72 ComplementDD]: Start complementDD. Operand 146 states and 7707 transitions. [2022-11-16 12:03:56,820 INFO L73 IsDeterministic]: Start isDeterministic. Operand 146 states and 7707 transitions. [2022-11-16 12:03:56,823 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:03:56,824 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 146 states and 7707 transitions. [2022-11-16 12:03:56,835 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 147 states, 146 states have (on average 52.78767123287671) internal successors, (7707), 146 states have internal predecessors, (7707), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:56,846 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 147 states, 147 states have (on average 87.0) internal successors, (12789), 147 states have internal predecessors, (12789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:56,849 INFO L81 ComplementDD]: Finished complementDD. Result has 147 states, 147 states have (on average 87.0) internal successors, (12789), 147 states have internal predecessors, (12789), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:56,849 INFO L175 Difference]: Start difference. First operand has 730 places, 1262 transitions, 26677 flow. Second operand 146 states and 7707 transitions. [2022-11-16 12:03:56,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 868 places, 1409 transitions, 33398 flow [2022-11-16 12:03:58,421 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 754 places, 1409 transitions, 32093 flow, removed 42 selfloop flow, removed 114 redundant places. [2022-11-16 12:03:58,452 INFO L231 Difference]: Finished difference. Result has 771 places, 1284 transitions, 28332 flow [2022-11-16 12:03:58,453 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=25406, PETRI_DIFFERENCE_MINUEND_PLACES=609, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1262, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1034, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=146, PETRI_FLOW=28332, PETRI_PLACES=771, PETRI_TRANSITIONS=1284} [2022-11-16 12:03:58,453 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 694 predicate places. [2022-11-16 12:03:58,453 INFO L495 AbstractCegarLoop]: Abstraction has has 771 places, 1284 transitions, 28332 flow [2022-11-16 12:03:58,454 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.6764705882353) internal successors, (1723), 34 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:03:58,454 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:03:58,454 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:03:58,460 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-16 12:03:58,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:03:58,655 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:03:58,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:03:58,656 INFO L85 PathProgramCache]: Analyzing trace with hash -909114679, now seen corresponding path program 9 times [2022-11-16 12:03:58,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:03:58,656 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770912938] [2022-11-16 12:03:58,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:03:58,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:03:58,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:03:58,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:03:58,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:03:58,965 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770912938] [2022-11-16 12:03:58,965 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1770912938] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:03:58,966 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1127702719] [2022-11-16 12:03:58,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:03:58,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:03:58,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:03:58,967 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:03:58,972 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-16 12:03:59,081 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 12:03:59,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:03:59,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:03:59,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:03:59,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:03:59,512 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:04:00,091 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:00,091 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1127702719] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:04:00,092 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:04:00,092 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-11-16 12:04:00,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130730968] [2022-11-16 12:04:00,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:04:00,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 12:04:00,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:04:00,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 12:04:00,097 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=974, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 12:04:00,099 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-11-16 12:04:00,100 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 771 places, 1284 transitions, 28332 flow. Second operand has 34 states, 34 states have (on average 50.705882352941174) internal successors, (1724), 34 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:00,101 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:04:00,101 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-11-16 12:04:00,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:04:05,306 INFO L130 PetriNetUnfolder]: 1372/3788 cut-off events. [2022-11-16 12:04:05,306 INFO L131 PetriNetUnfolder]: For 243875/243875 co-relation queries the response was YES. [2022-11-16 12:04:05,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38942 conditions, 3788 events. 1372/3788 cut-off events. For 243875/243875 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 32786 event pairs, 85 based on Foata normal form. 4/3747 useless extension candidates. Maximal degree in co-relation 38775. Up to 648 conditions per place. [2022-11-16 12:04:05,371 INFO L137 encePairwiseOnDemand]: 66/87 looper letters, 290 selfloop transitions, 1319 changer transitions 19/1667 dead transitions. [2022-11-16 12:04:05,371 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 820 places, 1667 transitions, 39937 flow [2022-11-16 12:04:05,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-16 12:04:05,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-11-16 12:04:05,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3187 transitions. [2022-11-16 12:04:05,378 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6105363984674329 [2022-11-16 12:04:05,379 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3187 transitions. [2022-11-16 12:04:05,379 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3187 transitions. [2022-11-16 12:04:05,380 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:04:05,380 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3187 transitions. [2022-11-16 12:04:05,392 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 53.11666666666667) internal successors, (3187), 60 states have internal predecessors, (3187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:05,399 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 87.0) internal successors, (5307), 61 states have internal predecessors, (5307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:05,400 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 87.0) internal successors, (5307), 61 states have internal predecessors, (5307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:05,400 INFO L175 Difference]: Start difference. First operand has 771 places, 1284 transitions, 28332 flow. Second operand 60 states and 3187 transitions. [2022-11-16 12:04:05,400 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 820 places, 1667 transitions, 39937 flow [2022-11-16 12:04:07,201 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 695 places, 1667 transitions, 37666 flow, removed 44 selfloop flow, removed 125 redundant places. [2022-11-16 12:04:07,244 INFO L231 Difference]: Finished difference. Result has 723 places, 1591 transitions, 37297 flow [2022-11-16 12:04:07,246 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=26550, PETRI_DIFFERENCE_MINUEND_PLACES=636, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1284, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1017, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=37297, PETRI_PLACES=723, PETRI_TRANSITIONS=1591} [2022-11-16 12:04:07,246 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 646 predicate places. [2022-11-16 12:04:07,246 INFO L495 AbstractCegarLoop]: Abstraction has has 723 places, 1591 transitions, 37297 flow [2022-11-16 12:04:07,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.705882352941174) internal successors, (1724), 34 states have internal predecessors, (1724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:07,247 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:04:07,247 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:04:07,263 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-16 12:04:07,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:04:07,464 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:04:07,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:04:07,465 INFO L85 PathProgramCache]: Analyzing trace with hash 1046933349, now seen corresponding path program 10 times [2022-11-16 12:04:07,465 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:04:07,465 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880667036] [2022-11-16 12:04:07,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:04:07,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:04:07,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:07,795 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:07,796 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:04:07,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880667036] [2022-11-16 12:04:07,796 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880667036] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:04:07,796 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668898483] [2022-11-16 12:04:07,796 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:04:07,796 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:04:07,796 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:04:07,800 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:04:07,827 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2022-11-16 12:04:07,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:04:07,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:04:07,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 12:04:07,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:04:08,343 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:08,343 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:04:08,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:08,855 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668898483] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:04:08,855 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:04:08,855 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-11-16 12:04:08,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181632244] [2022-11-16 12:04:08,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:04:08,856 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-16 12:04:08,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:04:08,857 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-16 12:04:08,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=934, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 12:04:08,859 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-11-16 12:04:08,860 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 723 places, 1591 transitions, 37297 flow. Second operand has 33 states, 33 states have (on average 50.878787878787875) internal successors, (1679), 33 states have internal predecessors, (1679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:08,860 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:04:08,860 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-11-16 12:04:08,861 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:04:16,678 INFO L130 PetriNetUnfolder]: 1437/3867 cut-off events. [2022-11-16 12:04:16,678 INFO L131 PetriNetUnfolder]: For 298801/298801 co-relation queries the response was YES. [2022-11-16 12:04:16,767 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43514 conditions, 3867 events. 1437/3867 cut-off events. For 298801/298801 co-relation queries the response was YES. Maximal size of possible extension queue 240. Compared 33384 event pairs, 161 based on Foata normal form. 1/3812 useless extension candidates. Maximal degree in co-relation 43329. Up to 1001 conditions per place. [2022-11-16 12:04:16,792 INFO L137 encePairwiseOnDemand]: 67/87 looper letters, 766 selfloop transitions, 1007 changer transitions 30/1842 dead transitions. [2022-11-16 12:04:16,792 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 823 places, 1842 transitions, 47883 flow [2022-11-16 12:04:16,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2022-11-16 12:04:16,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2022-11-16 12:04:16,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 5537 transitions. [2022-11-16 12:04:16,798 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6119584438549955 [2022-11-16 12:04:16,798 INFO L72 ComplementDD]: Start complementDD. Operand 104 states and 5537 transitions. [2022-11-16 12:04:16,798 INFO L73 IsDeterministic]: Start isDeterministic. Operand 104 states and 5537 transitions. [2022-11-16 12:04:16,799 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:04:16,799 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 104 states and 5537 transitions. [2022-11-16 12:04:16,805 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 105 states, 104 states have (on average 53.24038461538461) internal successors, (5537), 104 states have internal predecessors, (5537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:16,814 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 105 states, 105 states have (on average 87.0) internal successors, (9135), 105 states have internal predecessors, (9135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:16,816 INFO L81 ComplementDD]: Finished complementDD. Result has 105 states, 105 states have (on average 87.0) internal successors, (9135), 105 states have internal predecessors, (9135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:16,816 INFO L175 Difference]: Start difference. First operand has 723 places, 1591 transitions, 37297 flow. Second operand 104 states and 5537 transitions. [2022-11-16 12:04:16,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 823 places, 1842 transitions, 47883 flow [2022-11-16 12:04:19,346 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 800 places, 1842 transitions, 45889 flow, removed 799 selfloop flow, removed 23 redundant places. [2022-11-16 12:04:19,389 INFO L231 Difference]: Finished difference. Result has 818 places, 1701 transitions, 40869 flow [2022-11-16 12:04:19,390 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=36473, PETRI_DIFFERENCE_MINUEND_PLACES=697, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1591, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=901, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=679, PETRI_DIFFERENCE_SUBTRAHEND_STATES=104, PETRI_FLOW=40869, PETRI_PLACES=818, PETRI_TRANSITIONS=1701} [2022-11-16 12:04:19,391 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 741 predicate places. [2022-11-16 12:04:19,391 INFO L495 AbstractCegarLoop]: Abstraction has has 818 places, 1701 transitions, 40869 flow [2022-11-16 12:04:19,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.878787878787875) internal successors, (1679), 33 states have internal predecessors, (1679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:19,392 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:04:19,392 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:04:19,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2022-11-16 12:04:19,593 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2022-11-16 12:04:19,593 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:04:19,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:04:19,593 INFO L85 PathProgramCache]: Analyzing trace with hash 564764429, now seen corresponding path program 11 times [2022-11-16 12:04:19,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:04:19,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302896025] [2022-11-16 12:04:19,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:04:19,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:04:19,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:19,858 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:19,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:04:19,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302896025] [2022-11-16 12:04:19,859 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302896025] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:04:19,859 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45954824] [2022-11-16 12:04:19,859 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:04:19,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:04:19,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:04:19,860 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:04:19,866 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2022-11-16 12:04:19,948 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:04:19,948 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:04:19,950 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:04:19,951 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:04:20,369 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:20,370 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:04:21,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:21,044 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45954824] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:04:21,044 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:04:21,044 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-11-16 12:04:21,045 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696104106] [2022-11-16 12:04:21,045 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:04:21,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 12:04:21,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:04:21,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 12:04:21,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=987, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 12:04:21,048 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-11-16 12:04:21,048 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 818 places, 1701 transitions, 40869 flow. Second operand has 34 states, 34 states have (on average 50.85294117647059) internal successors, (1729), 34 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:21,048 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:04:21,049 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-11-16 12:04:21,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:04:29,391 INFO L130 PetriNetUnfolder]: 1479/4079 cut-off events. [2022-11-16 12:04:29,391 INFO L131 PetriNetUnfolder]: For 264584/264584 co-relation queries the response was YES. [2022-11-16 12:04:29,450 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43789 conditions, 4079 events. 1479/4079 cut-off events. For 264584/264584 co-relation queries the response was YES. Maximal size of possible extension queue 269. Compared 36343 event pairs, 118 based on Foata normal form. 4/4023 useless extension candidates. Maximal degree in co-relation 43591. Up to 869 conditions per place. [2022-11-16 12:04:29,481 INFO L137 encePairwiseOnDemand]: 65/87 looper letters, 507 selfloop transitions, 1299 changer transitions 32/1877 dead transitions. [2022-11-16 12:04:29,481 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 905 places, 1877 transitions, 49601 flow [2022-11-16 12:04:29,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 96 states. [2022-11-16 12:04:29,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2022-11-16 12:04:29,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 5152 transitions. [2022-11-16 12:04:29,484 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6168582375478927 [2022-11-16 12:04:29,484 INFO L72 ComplementDD]: Start complementDD. Operand 96 states and 5152 transitions. [2022-11-16 12:04:29,485 INFO L73 IsDeterministic]: Start isDeterministic. Operand 96 states and 5152 transitions. [2022-11-16 12:04:29,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:04:29,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 96 states and 5152 transitions. [2022-11-16 12:04:29,490 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 97 states, 96 states have (on average 53.666666666666664) internal successors, (5152), 96 states have internal predecessors, (5152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:29,498 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 97 states, 97 states have (on average 87.0) internal successors, (8439), 97 states have internal predecessors, (8439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:29,499 INFO L81 ComplementDD]: Finished complementDD. Result has 97 states, 97 states have (on average 87.0) internal successors, (8439), 97 states have internal predecessors, (8439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:29,500 INFO L175 Difference]: Start difference. First operand has 818 places, 1701 transitions, 40869 flow. Second operand 96 states and 5152 transitions. [2022-11-16 12:04:29,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 905 places, 1877 transitions, 49601 flow [2022-11-16 12:04:32,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 863 places, 1877 transitions, 46775 flow, removed 790 selfloop flow, removed 42 redundant places. [2022-11-16 12:04:32,228 INFO L231 Difference]: Finished difference. Result has 880 places, 1718 transitions, 43012 flow [2022-11-16 12:04:32,230 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=39458, PETRI_DIFFERENCE_MINUEND_PLACES=768, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1701, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1278, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=96, PETRI_FLOW=43012, PETRI_PLACES=880, PETRI_TRANSITIONS=1718} [2022-11-16 12:04:32,230 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 803 predicate places. [2022-11-16 12:04:32,231 INFO L495 AbstractCegarLoop]: Abstraction has has 880 places, 1718 transitions, 43012 flow [2022-11-16 12:04:32,231 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.85294117647059) internal successors, (1729), 34 states have internal predecessors, (1729), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:32,231 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:04:32,231 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:04:32,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2022-11-16 12:04:32,436 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2022-11-16 12:04:32,437 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:04:32,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:04:32,437 INFO L85 PathProgramCache]: Analyzing trace with hash 1321052287, now seen corresponding path program 12 times [2022-11-16 12:04:32,438 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:04:32,438 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200797627] [2022-11-16 12:04:32,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:04:32,438 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:04:32,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:32,762 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:32,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:04:32,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200797627] [2022-11-16 12:04:32,762 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200797627] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:04:32,762 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [329290311] [2022-11-16 12:04:32,763 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:04:32,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:04:32,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:04:32,768 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:04:32,776 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2022-11-16 12:04:32,877 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2022-11-16 12:04:32,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:04:32,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:04:32,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:04:33,383 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:33,383 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:04:33,816 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:33,816 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [329290311] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:04:33,817 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:04:33,817 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-11-16 12:04:33,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898262016] [2022-11-16 12:04:33,817 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:04:33,817 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-16 12:04:33,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:04:33,818 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-16 12:04:33,818 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=933, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 12:04:33,820 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-11-16 12:04:33,821 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 880 places, 1718 transitions, 43012 flow. Second operand has 33 states, 33 states have (on average 50.84848484848485) internal successors, (1678), 33 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:33,821 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:04:33,821 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-11-16 12:04:33,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:04:39,503 INFO L130 PetriNetUnfolder]: 1528/4303 cut-off events. [2022-11-16 12:04:39,503 INFO L131 PetriNetUnfolder]: For 160301/160301 co-relation queries the response was YES. [2022-11-16 12:04:39,560 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41742 conditions, 4303 events. 1528/4303 cut-off events. For 160301/160301 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 39249 event pairs, 89 based on Foata normal form. 4/4272 useless extension candidates. Maximal degree in co-relation 41534. Up to 775 conditions per place. [2022-11-16 12:04:39,590 INFO L137 encePairwiseOnDemand]: 69/87 looper letters, 438 selfloop transitions, 1289 changer transitions 73/1839 dead transitions. [2022-11-16 12:04:39,590 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 923 places, 1839 transitions, 49512 flow [2022-11-16 12:04:39,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2022-11-16 12:04:39,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2022-11-16 12:04:39,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 2958 transitions. [2022-11-16 12:04:39,594 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6181818181818182 [2022-11-16 12:04:39,595 INFO L72 ComplementDD]: Start complementDD. Operand 55 states and 2958 transitions. [2022-11-16 12:04:39,595 INFO L73 IsDeterministic]: Start isDeterministic. Operand 55 states and 2958 transitions. [2022-11-16 12:04:39,596 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:04:39,596 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 55 states and 2958 transitions. [2022-11-16 12:04:39,599 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 56 states, 55 states have (on average 53.78181818181818) internal successors, (2958), 55 states have internal predecessors, (2958), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:39,603 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 56 states, 56 states have (on average 87.0) internal successors, (4872), 56 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:39,603 INFO L81 ComplementDD]: Finished complementDD. Result has 56 states, 56 states have (on average 87.0) internal successors, (4872), 56 states have internal predecessors, (4872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:39,603 INFO L175 Difference]: Start difference. First operand has 880 places, 1718 transitions, 43012 flow. Second operand 55 states and 2958 transitions. [2022-11-16 12:04:39,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 923 places, 1839 transitions, 49512 flow [2022-11-16 12:04:42,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 833 places, 1839 transitions, 47139 flow, removed 48 selfloop flow, removed 90 redundant places. [2022-11-16 12:04:42,162 INFO L231 Difference]: Finished difference. Result has 840 places, 1703 transitions, 42933 flow [2022-11-16 12:04:42,164 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=40681, PETRI_DIFFERENCE_MINUEND_PLACES=779, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1718, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1280, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=438, PETRI_DIFFERENCE_SUBTRAHEND_STATES=55, PETRI_FLOW=42933, PETRI_PLACES=840, PETRI_TRANSITIONS=1703} [2022-11-16 12:04:42,164 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 763 predicate places. [2022-11-16 12:04:42,164 INFO L495 AbstractCegarLoop]: Abstraction has has 840 places, 1703 transitions, 42933 flow [2022-11-16 12:04:42,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.84848484848485) internal successors, (1678), 33 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:42,165 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:04:42,165 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:04:42,171 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2022-11-16 12:04:42,370 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2022-11-16 12:04:42,370 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:04:42,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:04:42,371 INFO L85 PathProgramCache]: Analyzing trace with hash -2112767601, now seen corresponding path program 13 times [2022-11-16 12:04:42,371 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:04:42,371 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891956478] [2022-11-16 12:04:42,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:04:42,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:04:42,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:42,641 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:42,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:04:42,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891956478] [2022-11-16 12:04:42,642 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [891956478] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:04:42,642 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120514761] [2022-11-16 12:04:42,642 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 12:04:42,642 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:04:42,642 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:04:42,643 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:04:42,646 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2022-11-16 12:04:42,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:04:42,734 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:04:42,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:04:43,103 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:43,103 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:04:43,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:04:43,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120514761] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:04:43,748 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:04:43,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-11-16 12:04:43,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455058708] [2022-11-16 12:04:43,748 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:04:43,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 12:04:43,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:04:43,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 12:04:43,750 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=151, Invalid=971, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 12:04:43,752 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-11-16 12:04:43,753 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 840 places, 1703 transitions, 42933 flow. Second operand has 34 states, 34 states have (on average 50.73529411764706) internal successors, (1725), 34 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:43,753 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:04:43,753 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-11-16 12:04:43,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:04:58,171 INFO L130 PetriNetUnfolder]: 1411/3874 cut-off events. [2022-11-16 12:04:58,172 INFO L131 PetriNetUnfolder]: For 146876/146876 co-relation queries the response was YES. [2022-11-16 12:04:58,225 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38705 conditions, 3874 events. 1411/3874 cut-off events. For 146876/146876 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 33707 event pairs, 97 based on Foata normal form. 3/3843 useless extension candidates. Maximal degree in co-relation 38503. Up to 685 conditions per place. [2022-11-16 12:04:58,251 INFO L137 encePairwiseOnDemand]: 64/87 looper letters, 428 selfloop transitions, 1379 changer transitions 32/1878 dead transitions. [2022-11-16 12:04:58,251 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1022 places, 1878 transitions, 50070 flow [2022-11-16 12:04:58,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 194 states. [2022-11-16 12:04:58,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 194 states. [2022-11-16 12:04:58,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 194 states to 194 states and 10240 transitions. [2022-11-16 12:04:58,262 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6067069558004503 [2022-11-16 12:04:58,263 INFO L72 ComplementDD]: Start complementDD. Operand 194 states and 10240 transitions. [2022-11-16 12:04:58,263 INFO L73 IsDeterministic]: Start isDeterministic. Operand 194 states and 10240 transitions. [2022-11-16 12:04:58,266 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:04:58,266 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 194 states and 10240 transitions. [2022-11-16 12:04:58,276 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 195 states, 194 states have (on average 52.78350515463917) internal successors, (10240), 194 states have internal predecessors, (10240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:58,289 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 195 states, 195 states have (on average 87.0) internal successors, (16965), 195 states have internal predecessors, (16965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:58,292 INFO L81 ComplementDD]: Finished complementDD. Result has 195 states, 195 states have (on average 87.0) internal successors, (16965), 195 states have internal predecessors, (16965), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:04:58,293 INFO L175 Difference]: Start difference. First operand has 840 places, 1703 transitions, 42933 flow. Second operand 194 states and 10240 transitions. [2022-11-16 12:04:58,293 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1022 places, 1878 transitions, 50070 flow [2022-11-16 12:05:00,217 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 971 places, 1878 transitions, 47311 flow, removed 93 selfloop flow, removed 51 redundant places. [2022-11-16 12:05:00,261 INFO L231 Difference]: Finished difference. Result has 980 places, 1688 transitions, 42840 flow [2022-11-16 12:05:00,262 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=40325, PETRI_DIFFERENCE_MINUEND_PLACES=778, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1703, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1376, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=194, PETRI_FLOW=42840, PETRI_PLACES=980, PETRI_TRANSITIONS=1688} [2022-11-16 12:05:00,262 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 903 predicate places. [2022-11-16 12:05:00,262 INFO L495 AbstractCegarLoop]: Abstraction has has 980 places, 1688 transitions, 42840 flow [2022-11-16 12:05:00,262 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.73529411764706) internal successors, (1725), 34 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:00,262 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:05:00,262 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:05:00,267 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2022-11-16 12:05:00,463 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:05:00,463 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:05:00,463 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:00,464 INFO L85 PathProgramCache]: Analyzing trace with hash -2003443767, now seen corresponding path program 14 times [2022-11-16 12:05:00,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:05:00,464 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6285945] [2022-11-16 12:05:00,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:00,464 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:05:00,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:00,798 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:00,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:05:00,798 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6285945] [2022-11-16 12:05:00,799 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [6285945] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:05:00,799 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502426170] [2022-11-16 12:05:00,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:05:00,799 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:05:00,799 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:05:00,800 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:05:00,802 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2022-11-16 12:05:00,888 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:05:00,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:05:00,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:05:00,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:01,272 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:01,272 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:05:01,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:01,941 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502426170] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:05:01,941 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:05:01,941 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-11-16 12:05:01,941 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646434591] [2022-11-16 12:05:01,941 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:05:01,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 12:05:01,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:05:01,942 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 12:05:01,942 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=982, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 12:05:01,944 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-11-16 12:05:01,944 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 980 places, 1688 transitions, 42840 flow. Second operand has 34 states, 34 states have (on average 50.73529411764706) internal successors, (1725), 34 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:01,944 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:05:01,944 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-11-16 12:05:01,945 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:05:07,362 INFO L130 PetriNetUnfolder]: 1408/3827 cut-off events. [2022-11-16 12:05:07,362 INFO L131 PetriNetUnfolder]: For 140484/140484 co-relation queries the response was YES. [2022-11-16 12:05:07,420 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38533 conditions, 3827 events. 1408/3827 cut-off events. For 140484/140484 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 33058 event pairs, 79 based on Foata normal form. 1/3798 useless extension candidates. Maximal degree in co-relation 38333. Up to 556 conditions per place. [2022-11-16 12:05:07,444 INFO L137 encePairwiseOnDemand]: 66/87 looper letters, 282 selfloop transitions, 1425 changer transitions 9/1755 dead transitions. [2022-11-16 12:05:07,444 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1022 places, 1755 transitions, 47523 flow [2022-11-16 12:05:07,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-16 12:05:07,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-11-16 12:05:07,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3178 transitions. [2022-11-16 12:05:07,448 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6088122605363985 [2022-11-16 12:05:07,448 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3178 transitions. [2022-11-16 12:05:07,448 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3178 transitions. [2022-11-16 12:05:07,449 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:05:07,449 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3178 transitions. [2022-11-16 12:05:07,451 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 52.96666666666667) internal successors, (3178), 60 states have internal predecessors, (3178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:07,454 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 87.0) internal successors, (5307), 61 states have internal predecessors, (5307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:07,455 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 87.0) internal successors, (5307), 61 states have internal predecessors, (5307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:07,455 INFO L175 Difference]: Start difference. First operand has 980 places, 1688 transitions, 42840 flow. Second operand 60 states and 3178 transitions. [2022-11-16 12:05:07,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1022 places, 1755 transitions, 47523 flow [2022-11-16 12:05:08,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 845 places, 1755 transitions, 44885 flow, removed 21 selfloop flow, removed 177 redundant places. [2022-11-16 12:05:08,993 INFO L231 Difference]: Finished difference. Result has 848 places, 1692 transitions, 43226 flow [2022-11-16 12:05:08,994 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=40234, PETRI_DIFFERENCE_MINUEND_PLACES=786, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1688, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1421, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=267, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=43226, PETRI_PLACES=848, PETRI_TRANSITIONS=1692} [2022-11-16 12:05:08,995 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 771 predicate places. [2022-11-16 12:05:08,995 INFO L495 AbstractCegarLoop]: Abstraction has has 848 places, 1692 transitions, 43226 flow [2022-11-16 12:05:08,995 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.73529411764706) internal successors, (1725), 34 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:08,995 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:05:08,995 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:05:09,000 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2022-11-16 12:05:09,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:05:09,196 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:05:09,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:09,197 INFO L85 PathProgramCache]: Analyzing trace with hash -203984005, now seen corresponding path program 15 times [2022-11-16 12:05:09,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:05:09,198 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670585852] [2022-11-16 12:05:09,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:09,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:05:09,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:09,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:09,482 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:05:09,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670585852] [2022-11-16 12:05:09,483 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670585852] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:05:09,483 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846091325] [2022-11-16 12:05:09,483 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:05:09,483 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:05:09,483 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:05:09,484 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:05:09,493 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2022-11-16 12:05:09,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2022-11-16 12:05:09,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:05:09,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:05:09,582 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:10,023 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:10,024 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:05:10,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:10,621 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846091325] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:05:10,621 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:05:10,621 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-11-16 12:05:10,621 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132655571] [2022-11-16 12:05:10,621 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:05:10,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 12:05:10,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:05:10,622 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 12:05:10,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=972, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 12:05:10,624 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-11-16 12:05:10,626 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 848 places, 1692 transitions, 43226 flow. Second operand has 34 states, 34 states have (on average 50.8235294117647) internal successors, (1728), 34 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:10,626 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:05:10,626 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-11-16 12:05:10,626 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:05:24,948 INFO L130 PetriNetUnfolder]: 1406/3821 cut-off events. [2022-11-16 12:05:24,948 INFO L131 PetriNetUnfolder]: For 141263/141263 co-relation queries the response was YES. [2022-11-16 12:05:25,021 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38953 conditions, 3821 events. 1406/3821 cut-off events. For 141263/141263 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 32986 event pairs, 98 based on Foata normal form. 3/3789 useless extension candidates. Maximal degree in co-relation 38758. Up to 685 conditions per place. [2022-11-16 12:05:25,048 INFO L137 encePairwiseOnDemand]: 64/87 looper letters, 421 selfloop transitions, 1368 changer transitions 31/1859 dead transitions. [2022-11-16 12:05:25,048 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1035 places, 1859 transitions, 50191 flow [2022-11-16 12:05:25,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 192 states. [2022-11-16 12:05:25,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 192 states. [2022-11-16 12:05:25,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 10131 transitions. [2022-11-16 12:05:25,055 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6065014367816092 [2022-11-16 12:05:25,055 INFO L72 ComplementDD]: Start complementDD. Operand 192 states and 10131 transitions. [2022-11-16 12:05:25,055 INFO L73 IsDeterministic]: Start isDeterministic. Operand 192 states and 10131 transitions. [2022-11-16 12:05:25,059 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:05:25,059 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 192 states and 10131 transitions. [2022-11-16 12:05:25,072 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 193 states, 192 states have (on average 52.765625) internal successors, (10131), 192 states have internal predecessors, (10131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:25,086 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 193 states, 193 states have (on average 87.0) internal successors, (16791), 193 states have internal predecessors, (16791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:25,090 INFO L81 ComplementDD]: Finished complementDD. Result has 193 states, 193 states have (on average 87.0) internal successors, (16791), 193 states have internal predecessors, (16791), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:25,090 INFO L175 Difference]: Start difference. First operand has 848 places, 1692 transitions, 43226 flow. Second operand 192 states and 10131 transitions. [2022-11-16 12:05:25,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1035 places, 1859 transitions, 50191 flow [2022-11-16 12:05:27,024 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 988 places, 1859 transitions, 47871 flow, removed 8 selfloop flow, removed 47 redundant places. [2022-11-16 12:05:27,080 INFO L231 Difference]: Finished difference. Result has 994 places, 1676 transitions, 43458 flow [2022-11-16 12:05:27,081 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=41010, PETRI_DIFFERENCE_MINUEND_PLACES=797, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1692, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1368, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=324, PETRI_DIFFERENCE_SUBTRAHEND_STATES=192, PETRI_FLOW=43458, PETRI_PLACES=994, PETRI_TRANSITIONS=1676} [2022-11-16 12:05:27,082 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 917 predicate places. [2022-11-16 12:05:27,082 INFO L495 AbstractCegarLoop]: Abstraction has has 994 places, 1676 transitions, 43458 flow [2022-11-16 12:05:27,083 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.8235294117647) internal successors, (1728), 34 states have internal predecessors, (1728), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:27,083 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:05:27,083 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:05:27,094 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2022-11-16 12:05:27,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2022-11-16 12:05:27,289 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:05:27,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:27,290 INFO L85 PathProgramCache]: Analyzing trace with hash -1807636801, now seen corresponding path program 16 times [2022-11-16 12:05:27,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:05:27,290 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539045635] [2022-11-16 12:05:27,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:27,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:05:27,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:27,568 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:27,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:05:27,568 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539045635] [2022-11-16 12:05:27,569 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539045635] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:05:27,569 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324723080] [2022-11-16 12:05:27,569 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:05:27,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:05:27,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:05:27,570 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:05:27,591 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2022-11-16 12:05:27,671 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:05:27,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:05:27,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-16 12:05:27,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:28,089 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:28,089 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:05:28,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:28,540 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324723080] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:05:28,540 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:05:28,541 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-11-16 12:05:28,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138271905] [2022-11-16 12:05:28,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:05:28,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-16 12:05:28,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:05:28,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-16 12:05:28,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=126, Invalid=930, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 12:05:28,543 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-11-16 12:05:28,544 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 994 places, 1676 transitions, 43458 flow. Second operand has 33 states, 33 states have (on average 50.878787878787875) internal successors, (1679), 33 states have internal predecessors, (1679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:28,544 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:05:28,544 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-11-16 12:05:28,544 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:05:37,516 INFO L130 PetriNetUnfolder]: 1537/3991 cut-off events. [2022-11-16 12:05:37,517 INFO L131 PetriNetUnfolder]: For 152228/152228 co-relation queries the response was YES. [2022-11-16 12:05:37,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42319 conditions, 3991 events. 1537/3991 cut-off events. For 152228/152228 co-relation queries the response was YES. Maximal size of possible extension queue 244. Compared 33834 event pairs, 173 based on Foata normal form. 2/3945 useless extension candidates. Maximal degree in co-relation 42120. Up to 1087 conditions per place. [2022-11-16 12:05:37,614 INFO L137 encePairwiseOnDemand]: 69/87 looper letters, 757 selfloop transitions, 1202 changer transitions 14/2012 dead transitions. [2022-11-16 12:05:37,614 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1102 places, 2012 transitions, 54868 flow [2022-11-16 12:05:37,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 126 states. [2022-11-16 12:05:37,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2022-11-16 12:05:37,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 6640 transitions. [2022-11-16 12:05:37,620 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6057288815909505 [2022-11-16 12:05:37,621 INFO L72 ComplementDD]: Start complementDD. Operand 126 states and 6640 transitions. [2022-11-16 12:05:37,621 INFO L73 IsDeterministic]: Start isDeterministic. Operand 126 states and 6640 transitions. [2022-11-16 12:05:37,623 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:05:37,623 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 126 states and 6640 transitions. [2022-11-16 12:05:37,630 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 127 states, 126 states have (on average 52.698412698412696) internal successors, (6640), 126 states have internal predecessors, (6640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:37,639 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 127 states, 127 states have (on average 87.0) internal successors, (11049), 127 states have internal predecessors, (11049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:37,641 INFO L81 ComplementDD]: Finished complementDD. Result has 127 states, 127 states have (on average 87.0) internal successors, (11049), 127 states have internal predecessors, (11049), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:37,641 INFO L175 Difference]: Start difference. First operand has 994 places, 1676 transitions, 43458 flow. Second operand 126 states and 6640 transitions. [2022-11-16 12:05:37,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1102 places, 2012 transitions, 54868 flow [2022-11-16 12:05:39,582 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 911 places, 2012 transitions, 51587 flow, removed 12 selfloop flow, removed 191 redundant places. [2022-11-16 12:05:39,775 INFO L231 Difference]: Finished difference. Result has 925 places, 1919 transitions, 48749 flow [2022-11-16 12:05:39,776 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=40651, PETRI_DIFFERENCE_MINUEND_PLACES=786, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1676, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=980, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=685, PETRI_DIFFERENCE_SUBTRAHEND_STATES=126, PETRI_FLOW=48749, PETRI_PLACES=925, PETRI_TRANSITIONS=1919} [2022-11-16 12:05:39,776 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 848 predicate places. [2022-11-16 12:05:39,777 INFO L495 AbstractCegarLoop]: Abstraction has has 925 places, 1919 transitions, 48749 flow [2022-11-16 12:05:39,777 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.878787878787875) internal successors, (1679), 33 states have internal predecessors, (1679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:39,777 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:05:39,777 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:05:39,782 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Forceful destruction successful, exit code 0 [2022-11-16 12:05:39,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:05:39,978 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:05:39,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:39,978 INFO L85 PathProgramCache]: Analyzing trace with hash 530943853, now seen corresponding path program 17 times [2022-11-16 12:05:39,978 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:05:39,978 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760616790] [2022-11-16 12:05:39,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:39,979 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:05:39,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:40,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:40,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:05:40,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760616790] [2022-11-16 12:05:40,249 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760616790] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:05:40,249 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198067428] [2022-11-16 12:05:40,249 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-16 12:05:40,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:05:40,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:05:40,252 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:05:40,275 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2022-11-16 12:05:40,358 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2022-11-16 12:05:40,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:05:40,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:05:40,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:40,700 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:40,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:05:41,169 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:41,170 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198067428] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:05:41,170 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:05:41,170 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-11-16 12:05:41,170 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956531332] [2022-11-16 12:05:41,170 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:05:41,171 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-16 12:05:41,171 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:05:41,171 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-16 12:05:41,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=931, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 12:05:41,174 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-11-16 12:05:41,175 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 925 places, 1919 transitions, 48749 flow. Second operand has 33 states, 33 states have (on average 50.72727272727273) internal successors, (1674), 33 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:41,175 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:05:41,175 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-11-16 12:05:41,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:05:46,924 INFO L130 PetriNetUnfolder]: 1768/4458 cut-off events. [2022-11-16 12:05:46,924 INFO L131 PetriNetUnfolder]: For 167503/167503 co-relation queries the response was YES. [2022-11-16 12:05:47,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48078 conditions, 4458 events. 1768/4458 cut-off events. For 167503/167503 co-relation queries the response was YES. Maximal size of possible extension queue 256. Compared 37750 event pairs, 97 based on Foata normal form. 1/4422 useless extension candidates. Maximal degree in co-relation 47874. Up to 884 conditions per place. [2022-11-16 12:05:47,210 INFO L137 encePairwiseOnDemand]: 69/87 looper letters, 695 selfloop transitions, 1611 changer transitions 9/2354 dead transitions. [2022-11-16 12:05:47,210 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 962 places, 2354 transitions, 64079 flow [2022-11-16 12:05:47,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-16 12:05:47,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-11-16 12:05:47,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2351 transitions. [2022-11-16 12:05:47,213 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.614158829676071 [2022-11-16 12:05:47,213 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2351 transitions. [2022-11-16 12:05:47,213 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2351 transitions. [2022-11-16 12:05:47,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:05:47,214 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2351 transitions. [2022-11-16 12:05:47,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 53.43181818181818) internal successors, (2351), 44 states have internal predecessors, (2351), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:47,217 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 87.0) internal successors, (3915), 45 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:47,218 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 87.0) internal successors, (3915), 45 states have internal predecessors, (3915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:47,218 INFO L175 Difference]: Start difference. First operand has 925 places, 1919 transitions, 48749 flow. Second operand 44 states and 2351 transitions. [2022-11-16 12:05:47,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 962 places, 2354 transitions, 64079 flow [2022-11-16 12:05:49,539 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 924 places, 2354 transitions, 62671 flow, removed 154 selfloop flow, removed 38 redundant places. [2022-11-16 12:05:49,597 INFO L231 Difference]: Finished difference. Result has 953 places, 2278 transitions, 62390 flow [2022-11-16 12:05:49,598 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=47642, PETRI_DIFFERENCE_MINUEND_PLACES=881, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1919, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1254, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=527, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=62390, PETRI_PLACES=953, PETRI_TRANSITIONS=2278} [2022-11-16 12:05:49,599 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 876 predicate places. [2022-11-16 12:05:49,599 INFO L495 AbstractCegarLoop]: Abstraction has has 953 places, 2278 transitions, 62390 flow [2022-11-16 12:05:49,599 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.72727272727273) internal successors, (1674), 33 states have internal predecessors, (1674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:49,599 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:05:49,599 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:05:49,604 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Forceful destruction successful, exit code 0 [2022-11-16 12:05:49,800 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2022-11-16 12:05:49,800 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:05:49,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:05:49,800 INFO L85 PathProgramCache]: Analyzing trace with hash 870611143, now seen corresponding path program 18 times [2022-11-16 12:05:49,800 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:05:49,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616931529] [2022-11-16 12:05:49,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:05:49,801 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:05:49,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:05:50,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:50,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:05:50,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616931529] [2022-11-16 12:05:50,060 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616931529] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:05:50,060 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2056678032] [2022-11-16 12:05:50,060 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-16 12:05:50,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:05:50,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:05:50,064 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:05:50,077 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2022-11-16 12:05:50,171 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2022-11-16 12:05:50,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:05:50,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 19 conjunts are in the unsatisfiable core [2022-11-16 12:05:50,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:05:50,711 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:50,711 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:05:51,227 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:05:51,228 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2056678032] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:05:51,228 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:05:51,228 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 33 [2022-11-16 12:05:51,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374607620] [2022-11-16 12:05:51,228 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:05:51,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2022-11-16 12:05:51,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:05:51,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2022-11-16 12:05:51,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=935, Unknown=0, NotChecked=0, Total=1056 [2022-11-16 12:05:51,231 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-11-16 12:05:51,232 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 953 places, 2278 transitions, 62390 flow. Second operand has 33 states, 33 states have (on average 50.84848484848485) internal successors, (1678), 33 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:51,232 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:05:51,232 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-11-16 12:05:51,232 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:05:59,141 INFO L130 PetriNetUnfolder]: 2183/5294 cut-off events. [2022-11-16 12:05:59,141 INFO L131 PetriNetUnfolder]: For 218703/218703 co-relation queries the response was YES. [2022-11-16 12:05:59,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 62447 conditions, 5294 events. 2183/5294 cut-off events. For 218703/218703 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 44985 event pairs, 115 based on Foata normal form. 1/5256 useless extension candidates. Maximal degree in co-relation 62222. Up to 1080 conditions per place. [2022-11-16 12:05:59,341 INFO L137 encePairwiseOnDemand]: 69/87 looper letters, 998 selfloop transitions, 1955 changer transitions 9/3001 dead transitions. [2022-11-16 12:05:59,342 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 984 places, 3001 transitions, 87849 flow [2022-11-16 12:05:59,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2022-11-16 12:05:59,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2022-11-16 12:05:59,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 1923 transitions. [2022-11-16 12:05:59,344 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6139846743295019 [2022-11-16 12:05:59,344 INFO L72 ComplementDD]: Start complementDD. Operand 36 states and 1923 transitions. [2022-11-16 12:05:59,344 INFO L73 IsDeterministic]: Start isDeterministic. Operand 36 states and 1923 transitions. [2022-11-16 12:05:59,345 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:05:59,345 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 36 states and 1923 transitions. [2022-11-16 12:05:59,346 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 37 states, 36 states have (on average 53.416666666666664) internal successors, (1923), 36 states have internal predecessors, (1923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:59,350 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 37 states, 37 states have (on average 87.0) internal successors, (3219), 37 states have internal predecessors, (3219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:59,350 INFO L81 ComplementDD]: Finished complementDD. Result has 37 states, 37 states have (on average 87.0) internal successors, (3219), 37 states have internal predecessors, (3219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:05:59,351 INFO L175 Difference]: Start difference. First operand has 953 places, 2278 transitions, 62390 flow. Second operand 36 states and 1923 transitions. [2022-11-16 12:05:59,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 984 places, 3001 transitions, 87849 flow [2022-11-16 12:06:02,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 973 places, 3001 transitions, 87554 flow, removed 60 selfloop flow, removed 11 redundant places. [2022-11-16 12:06:02,546 INFO L231 Difference]: Finished difference. Result has 994 places, 2912 transitions, 86232 flow [2022-11-16 12:06:02,547 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=62154, PETRI_DIFFERENCE_MINUEND_PLACES=938, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2278, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1354, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=691, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=86232, PETRI_PLACES=994, PETRI_TRANSITIONS=2912} [2022-11-16 12:06:02,548 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 917 predicate places. [2022-11-16 12:06:02,548 INFO L495 AbstractCegarLoop]: Abstraction has has 994 places, 2912 transitions, 86232 flow [2022-11-16 12:06:02,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 50.84848484848485) internal successors, (1678), 33 states have internal predecessors, (1678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:02,548 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:06:02,549 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:02,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2022-11-16 12:06:02,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:06:02,754 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:06:02,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:02,755 INFO L85 PathProgramCache]: Analyzing trace with hash 863753387, now seen corresponding path program 19 times [2022-11-16 12:06:02,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:02,755 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776913166] [2022-11-16 12:06:02,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:02,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:02,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:03,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:03,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:03,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776913166] [2022-11-16 12:06:03,023 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1776913166] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:06:03,023 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140077306] [2022-11-16 12:06:03,023 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-16 12:06:03,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:06:03,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:06:03,028 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:06:03,051 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2022-11-16 12:06:03,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:03,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:06:03,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:03,573 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:03,574 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:06:04,257 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:04,257 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140077306] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:06:04,257 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:06:04,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-11-16 12:06:04,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790428175] [2022-11-16 12:06:04,258 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:06:04,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 12:06:04,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:04,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 12:06:04,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=992, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 12:06:04,261 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-11-16 12:06:04,262 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 994 places, 2912 transitions, 86232 flow. Second operand has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:04,262 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:06:04,262 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-11-16 12:06:04,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:06:18,133 INFO L130 PetriNetUnfolder]: 2414/5774 cut-off events. [2022-11-16 12:06:18,133 INFO L131 PetriNetUnfolder]: For 264904/264904 co-relation queries the response was YES. [2022-11-16 12:06:18,243 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72608 conditions, 5774 events. 2414/5774 cut-off events. For 264904/264904 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 49364 event pairs, 113 based on Foata normal form. 1/5736 useless extension candidates. Maximal degree in co-relation 72366. Up to 1085 conditions per place. [2022-11-16 12:06:18,291 INFO L137 encePairwiseOnDemand]: 66/87 looper letters, 1099 selfloop transitions, 2278 changer transitions 10/3426 dead transitions. [2022-11-16 12:06:18,291 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1076 places, 3426 transitions, 106724 flow [2022-11-16 12:06:18,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 87 states. [2022-11-16 12:06:18,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2022-11-16 12:06:18,295 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 4603 transitions. [2022-11-16 12:06:18,296 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6081384595058792 [2022-11-16 12:06:18,296 INFO L72 ComplementDD]: Start complementDD. Operand 87 states and 4603 transitions. [2022-11-16 12:06:18,296 INFO L73 IsDeterministic]: Start isDeterministic. Operand 87 states and 4603 transitions. [2022-11-16 12:06:18,298 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:06:18,298 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 87 states and 4603 transitions. [2022-11-16 12:06:18,303 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 88 states, 87 states have (on average 52.9080459770115) internal successors, (4603), 87 states have internal predecessors, (4603), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:18,307 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 88 states, 88 states have (on average 87.0) internal successors, (7656), 88 states have internal predecessors, (7656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:18,308 INFO L81 ComplementDD]: Finished complementDD. Result has 88 states, 88 states have (on average 87.0) internal successors, (7656), 88 states have internal predecessors, (7656), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:18,308 INFO L175 Difference]: Start difference. First operand has 994 places, 2912 transitions, 86232 flow. Second operand 87 states and 4603 transitions. [2022-11-16 12:06:18,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1076 places, 3426 transitions, 106724 flow [2022-11-16 12:06:23,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1064 places, 3426 transitions, 106077 flow, removed 93 selfloop flow, removed 12 redundant places. [2022-11-16 12:06:23,523 INFO L231 Difference]: Finished difference. Result has 1091 places, 3320 transitions, 103566 flow [2022-11-16 12:06:23,526 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=85688, PETRI_DIFFERENCE_MINUEND_PLACES=978, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=2912, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1898, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=921, PETRI_DIFFERENCE_SUBTRAHEND_STATES=87, PETRI_FLOW=103566, PETRI_PLACES=1091, PETRI_TRANSITIONS=3320} [2022-11-16 12:06:23,526 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 1014 predicate places. [2022-11-16 12:06:23,526 INFO L495 AbstractCegarLoop]: Abstraction has has 1091 places, 3320 transitions, 103566 flow [2022-11-16 12:06:23,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.794117647058826) internal successors, (1727), 34 states have internal predecessors, (1727), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:23,526 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:06:23,526 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:23,533 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2022-11-16 12:06:23,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:06:23,727 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:06:23,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:23,728 INFO L85 PathProgramCache]: Analyzing trace with hash 1510788901, now seen corresponding path program 20 times [2022-11-16 12:06:23,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:23,728 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600321631] [2022-11-16 12:06:23,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:23,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:23,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:23,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:23,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:23,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600321631] [2022-11-16 12:06:23,959 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600321631] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:06:23,959 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171618606] [2022-11-16 12:06:23,959 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-16 12:06:23,959 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:06:23,959 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:06:23,960 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:06:23,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2022-11-16 12:06:24,046 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-16 12:06:24,047 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:06:24,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:06:24,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:24,373 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:24,374 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:06:24,926 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:24,926 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171618606] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:06:24,927 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:06:24,927 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-11-16 12:06:24,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689658021] [2022-11-16 12:06:24,927 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:06:24,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 12:06:24,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:24,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 12:06:24,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=990, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 12:06:24,930 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-11-16 12:06:24,931 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1091 places, 3320 transitions, 103566 flow. Second operand has 34 states, 34 states have (on average 50.6764705882353) internal successors, (1723), 34 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:24,932 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:06:24,932 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-11-16 12:06:24,932 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:06:37,037 INFO L130 PetriNetUnfolder]: 2415/5833 cut-off events. [2022-11-16 12:06:37,037 INFO L131 PetriNetUnfolder]: For 295241/295241 co-relation queries the response was YES. [2022-11-16 12:06:37,145 INFO L83 FinitePrefix]: Finished finitePrefix Result has 76200 conditions, 5833 events. 2415/5833 cut-off events. For 295241/295241 co-relation queries the response was YES. Maximal size of possible extension queue 295. Compared 50266 event pairs, 116 based on Foata normal form. 1/5795 useless extension candidates. Maximal degree in co-relation 75937. Up to 1109 conditions per place. [2022-11-16 12:06:37,194 INFO L137 encePairwiseOnDemand]: 66/87 looper letters, 1373 selfloop transitions, 1985 changer transitions 10/3407 dead transitions. [2022-11-16 12:06:37,194 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1139 places, 3407 transitions, 112331 flow [2022-11-16 12:06:37,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-16 12:06:37,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-11-16 12:06:37,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 2874 transitions. [2022-11-16 12:06:37,197 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.611749680715198 [2022-11-16 12:06:37,198 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 2874 transitions. [2022-11-16 12:06:37,198 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 2874 transitions. [2022-11-16 12:06:37,198 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:06:37,198 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 2874 transitions. [2022-11-16 12:06:37,200 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 53.22222222222222) internal successors, (2874), 54 states have internal predecessors, (2874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:37,204 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 87.0) internal successors, (4785), 55 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:37,205 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 87.0) internal successors, (4785), 55 states have internal predecessors, (4785), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:37,205 INFO L175 Difference]: Start difference. First operand has 1091 places, 3320 transitions, 103566 flow. Second operand 54 states and 2874 transitions. [2022-11-16 12:06:37,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1139 places, 3407 transitions, 112331 flow [2022-11-16 12:06:41,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1120 places, 3407 transitions, 111490 flow, removed 106 selfloop flow, removed 19 redundant places. [2022-11-16 12:06:42,108 INFO L231 Difference]: Finished difference. Result has 1130 places, 3346 transitions, 108253 flow [2022-11-16 12:06:42,110 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=102745, PETRI_DIFFERENCE_MINUEND_PLACES=1067, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3320, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1960, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1347, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=108253, PETRI_PLACES=1130, PETRI_TRANSITIONS=3346} [2022-11-16 12:06:42,111 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 1053 predicate places. [2022-11-16 12:06:42,111 INFO L495 AbstractCegarLoop]: Abstraction has has 1130 places, 3346 transitions, 108253 flow [2022-11-16 12:06:42,111 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.6764705882353) internal successors, (1723), 34 states have internal predecessors, (1723), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:42,111 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:06:42,112 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:06:42,116 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2022-11-16 12:06:42,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:06:42,313 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:06:42,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:06:42,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1100366519, now seen corresponding path program 21 times [2022-11-16 12:06:42,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:06:42,313 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102727433] [2022-11-16 12:06:42,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:06:42,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:06:42,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:06:42,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:42,524 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:06:42,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102727433] [2022-11-16 12:06:42,524 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102727433] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:06:42,524 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [496045756] [2022-11-16 12:06:42,524 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-16 12:06:42,524 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:06:42,524 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:06:42,525 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:06:42,527 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2022-11-16 12:06:42,615 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-16 12:06:42,615 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:06:42,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 20 conjunts are in the unsatisfiable core [2022-11-16 12:06:42,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:06:42,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:42,965 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:06:43,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:06:43,529 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [496045756] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:06:43,530 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:06:43,530 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 34 [2022-11-16 12:06:43,530 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1327877298] [2022-11-16 12:06:43,530 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:06:43,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2022-11-16 12:06:43,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:06:43,531 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2022-11-16 12:06:43,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=986, Unknown=0, NotChecked=0, Total=1122 [2022-11-16 12:06:43,535 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-11-16 12:06:43,536 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1130 places, 3346 transitions, 108253 flow. Second operand has 34 states, 34 states have (on average 50.73529411764706) internal successors, (1725), 34 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:43,536 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:06:43,536 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-11-16 12:06:43,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-16 12:06:53,246 INFO L130 PetriNetUnfolder]: 2415/5842 cut-off events. [2022-11-16 12:06:53,246 INFO L131 PetriNetUnfolder]: For 328992/328992 co-relation queries the response was YES. [2022-11-16 12:06:53,540 INFO L83 FinitePrefix]: Finished finitePrefix Result has 78594 conditions, 5842 events. 2415/5842 cut-off events. For 328992/328992 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 50395 event pairs, 118 based on Foata normal form. 1/5804 useless extension candidates. Maximal degree in co-relation 78329. Up to 1119 conditions per place. [2022-11-16 12:06:53,607 INFO L137 encePairwiseOnDemand]: 66/87 looper letters, 1381 selfloop transitions, 1980 changer transitions 17/3417 dead transitions. [2022-11-16 12:06:53,607 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 1177 places, 3417 transitions, 116583 flow [2022-11-16 12:06:53,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-16 12:06:53,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2022-11-16 12:06:53,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 2816 transitions. [2022-11-16 12:06:53,611 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.6107135111689438 [2022-11-16 12:06:53,612 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 2816 transitions. [2022-11-16 12:06:53,612 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 2816 transitions. [2022-11-16 12:06:53,613 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-16 12:06:53,613 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 2816 transitions. [2022-11-16 12:06:53,616 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 53.132075471698116) internal successors, (2816), 53 states have internal predecessors, (2816), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:53,620 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 87.0) internal successors, (4698), 54 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:53,620 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 87.0) internal successors, (4698), 54 states have internal predecessors, (4698), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:06:53,620 INFO L175 Difference]: Start difference. First operand has 1130 places, 3346 transitions, 108253 flow. Second operand 53 states and 2816 transitions. [2022-11-16 12:06:53,620 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 1177 places, 3417 transitions, 116583 flow [2022-11-16 12:07:00,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 1149 places, 3417 transitions, 114301 flow, removed 22 selfloop flow, removed 28 redundant places. [2022-11-16 12:07:00,389 INFO L231 Difference]: Finished difference. Result has 1158 places, 3354 transitions, 110672 flow [2022-11-16 12:07:00,391 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=105980, PETRI_DIFFERENCE_MINUEND_PLACES=1097, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=3346, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1971, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=1371, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=110672, PETRI_PLACES=1158, PETRI_TRANSITIONS=3354} [2022-11-16 12:07:00,391 INFO L288 CegarLoopForPetriNet]: 77 programPoint places, 1081 predicate places. [2022-11-16 12:07:00,391 INFO L495 AbstractCegarLoop]: Abstraction has has 1158 places, 3354 transitions, 110672 flow [2022-11-16 12:07:00,392 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 50.73529411764706) internal successors, (1725), 34 states have internal predecessors, (1725), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:00,392 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-16 12:07:00,392 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-16 12:07:00,397 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2022-11-16 12:07:00,592 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2022-11-16 12:07:00,593 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-16 12:07:00,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-16 12:07:00,593 INFO L85 PathProgramCache]: Analyzing trace with hash -214192729, now seen corresponding path program 22 times [2022-11-16 12:07:00,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-16 12:07:00,593 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238268378] [2022-11-16 12:07:00,593 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-16 12:07:00,594 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-16 12:07:00,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-16 12:07:00,895 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:07:00,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-16 12:07:00,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238268378] [2022-11-16 12:07:00,895 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238268378] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-16 12:07:00,895 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090960055] [2022-11-16 12:07:00,896 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-16 12:07:00,896 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-16 12:07:00,896 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 [2022-11-16 12:07:00,897 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-16 12:07:00,927 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_bd49a846-aec7-408c-9064-05f4e5b8c1c1/bin/uautomizer-tPACEb0tL8/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2022-11-16 12:07:01,007 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-16 12:07:01,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-16 12:07:01,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 21 conjunts are in the unsatisfiable core [2022-11-16 12:07:01,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-16 12:07:01,366 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:07:01,366 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-16 12:07:01,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-16 12:07:01,853 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090960055] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-16 12:07:01,853 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-16 12:07:01,853 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 15, 15] total 30 [2022-11-16 12:07:01,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906005706] [2022-11-16 12:07:01,853 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-16 12:07:01,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2022-11-16 12:07:01,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-16 12:07:01,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2022-11-16 12:07:01,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=760, Unknown=0, NotChecked=0, Total=870 [2022-11-16 12:07:01,856 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 49 out of 87 [2022-11-16 12:07:01,858 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1158 places, 3354 transitions, 110672 flow. Second operand has 30 states, 30 states have (on average 50.9) internal successors, (1527), 30 states have internal predecessors, (1527), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-16 12:07:01,858 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-16 12:07:01,858 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 49 of 87 [2022-11-16 12:07:01,858 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand