./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/stack-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version b5237d83 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_27e08c94-12c7-40c2-8f1c-60d2acc285a1/bin/uautomizer-vX5HgA9Q3a/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27e08c94-12c7-40c2-8f1c-60d2acc285a1/bin/uautomizer-vX5HgA9Q3a/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27e08c94-12c7-40c2-8f1c-60d2acc285a1/bin/uautomizer-vX5HgA9Q3a/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27e08c94-12c7-40c2-8f1c-60d2acc285a1/bin/uautomizer-vX5HgA9Q3a/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/stack-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27e08c94-12c7-40c2-8f1c-60d2acc285a1/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27e08c94-12c7-40c2-8f1c-60d2acc285a1/bin/uautomizer-vX5HgA9Q3a --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 a5e93db72222dd521789305cbf7823ac91f269c62c97020d54f95f5ba14d3fd2 --- 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-b5237d8 [2022-11-21 13:56:54,795 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-21 13:56:54,797 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-21 13:56:54,815 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-21 13:56:54,816 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-21 13:56:54,817 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-21 13:56:54,818 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-21 13:56:54,820 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-21 13:56:54,821 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-21 13:56:54,822 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-21 13:56:54,823 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-21 13:56:54,825 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-21 13:56:54,825 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-21 13:56:54,826 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-21 13:56:54,827 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-21 13:56:54,828 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-21 13:56:54,829 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-21 13:56:54,830 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-21 13:56:54,832 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-21 13:56:54,834 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-21 13:56:54,835 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-21 13:56:54,840 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-21 13:56:54,841 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-21 13:56:54,842 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-21 13:56:54,845 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-21 13:56:54,846 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-21 13:56:54,846 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-21 13:56:54,847 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-21 13:56:54,848 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-21 13:56:54,849 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-21 13:56:54,849 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-21 13:56:54,850 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-21 13:56:54,851 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-21 13:56:54,852 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-21 13:56:54,853 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-21 13:56:54,854 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-21 13:56:54,865 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-21 13:56:54,867 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-21 13:56:54,867 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-21 13:56:54,871 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-21 13:56:54,871 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-21 13:56:54,872 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27e08c94-12c7-40c2-8f1c-60d2acc285a1/bin/uautomizer-vX5HgA9Q3a/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-21 13:56:54,907 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-21 13:56:54,908 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-21 13:56:54,908 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-21 13:56:54,909 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-21 13:56:54,910 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-21 13:56:54,910 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-21 13:56:54,911 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-21 13:56:54,911 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-21 13:56:54,911 INFO L138 SettingsManager]: * Use SBE=true [2022-11-21 13:56:54,911 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-21 13:56:54,913 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-21 13:56:54,913 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-21 13:56:54,913 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-21 13:56:54,913 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-21 13:56:54,914 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-21 13:56:54,914 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-21 13:56:54,914 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-21 13:56:54,914 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-21 13:56:54,915 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-21 13:56:54,915 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-21 13:56:54,915 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-21 13:56:54,915 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-21 13:56:54,916 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-21 13:56:54,916 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-21 13:56:54,916 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 13:56:54,916 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-21 13:56:54,916 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-21 13:56:54,917 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-21 13:56:54,917 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-21 13:56:54,918 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-21 13:56:54,918 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-21 13:56:54,918 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-21 13:56:54,919 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-21 13:56:54,919 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_27e08c94-12c7-40c2-8f1c-60d2acc285a1/bin/uautomizer-vX5HgA9Q3a/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27e08c94-12c7-40c2-8f1c-60d2acc285a1/bin/uautomizer-vX5HgA9Q3a Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a5e93db72222dd521789305cbf7823ac91f269c62c97020d54f95f5ba14d3fd2 [2022-11-21 13:56:55,289 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-21 13:56:55,322 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-21 13:56:55,324 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-21 13:56:55,326 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-21 13:56:55,326 INFO L275 PluginConnector]: CDTParser initialized [2022-11-21 13:56:55,328 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27e08c94-12c7-40c2-8f1c-60d2acc285a1/bin/uautomizer-vX5HgA9Q3a/../../sv-benchmarks/c/pthread/stack-1.i [2022-11-21 13:56:58,320 INFO L500 CDTParser]: Created temporary CDT project at NULL [2022-11-21 13:56:58,636 INFO L351 CDTParser]: Found 1 translation units. [2022-11-21 13:56:58,641 INFO L172 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27e08c94-12c7-40c2-8f1c-60d2acc285a1/sv-benchmarks/c/pthread/stack-1.i [2022-11-21 13:56:58,659 INFO L394 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27e08c94-12c7-40c2-8f1c-60d2acc285a1/bin/uautomizer-vX5HgA9Q3a/data/ffe1eb8eb/3798fae166584b66b87655121837db47/FLAGa5ff8dfc8 [2022-11-21 13:56:58,679 INFO L402 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27e08c94-12c7-40c2-8f1c-60d2acc285a1/bin/uautomizer-vX5HgA9Q3a/data/ffe1eb8eb/3798fae166584b66b87655121837db47 [2022-11-21 13:56:58,694 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-21 13:56:58,699 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-21 13:56:58,701 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-21 13:56:58,701 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-21 13:56:58,710 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-21 13:56:58,711 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:56:58" (1/1) ... [2022-11-21 13:56:58,712 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7a3f0eae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:56:58, skipping insertion in model container [2022-11-21 13:56:58,712 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 01:56:58" (1/1) ... [2022-11-21 13:56:58,727 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-21 13:56:58,790 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-21 13:56:59,351 WARN L237 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_27e08c94-12c7-40c2-8f1c-60d2acc285a1/sv-benchmarks/c/pthread/stack-1.i[41520,41533] [2022-11-21 13:56:59,404 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 13:56:59,419 INFO L203 MainTranslator]: Completed pre-run [2022-11-21 13:56:59,479 WARN L237 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_27e08c94-12c7-40c2-8f1c-60d2acc285a1/sv-benchmarks/c/pthread/stack-1.i[41520,41533] [2022-11-21 13:56:59,497 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-21 13:56:59,571 INFO L208 MainTranslator]: Completed translation [2022-11-21 13:56:59,572 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:56:59 WrapperNode [2022-11-21 13:56:59,572 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-21 13:56:59,573 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-21 13:56:59,574 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-21 13:56:59,574 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-21 13:56:59,582 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:56:59" (1/1) ... [2022-11-21 13:56:59,602 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:56:59" (1/1) ... [2022-11-21 13:56:59,643 INFO L138 Inliner]: procedures = 277, calls = 43, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 152 [2022-11-21 13:56:59,644 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-21 13:56:59,645 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-21 13:56:59,645 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-21 13:56:59,645 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-21 13:56:59,655 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:56:59" (1/1) ... [2022-11-21 13:56:59,656 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:56:59" (1/1) ... [2022-11-21 13:56:59,664 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:56:59" (1/1) ... [2022-11-21 13:56:59,665 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:56:59" (1/1) ... [2022-11-21 13:56:59,672 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:56:59" (1/1) ... [2022-11-21 13:56:59,690 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:56:59" (1/1) ... [2022-11-21 13:56:59,692 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:56:59" (1/1) ... [2022-11-21 13:56:59,693 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:56:59" (1/1) ... [2022-11-21 13:56:59,696 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-21 13:56:59,697 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-21 13:56:59,697 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-21 13:56:59,698 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-21 13:56:59,699 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:56:59" (1/1) ... [2022-11-21 13:56:59,707 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-21 13:56:59,722 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27e08c94-12c7-40c2-8f1c-60d2acc285a1/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:56:59,737 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27e08c94-12c7-40c2-8f1c-60d2acc285a1/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-21 13:56:59,768 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27e08c94-12c7-40c2-8f1c-60d2acc285a1/bin/uautomizer-vX5HgA9Q3a/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-21 13:56:59,787 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-21 13:56:59,788 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-21 13:56:59,788 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-21 13:56:59,788 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-21 13:56:59,788 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-21 13:56:59,788 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-21 13:56:59,789 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-21 13:56:59,789 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-21 13:56:59,790 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-21 13:56:59,790 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-21 13:56:59,790 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-21 13:56:59,790 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-21 13:56:59,790 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-21 13:56:59,793 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-21 13:56:59,952 INFO L235 CfgBuilder]: Building ICFG [2022-11-21 13:56:59,955 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-21 13:57:00,295 INFO L276 CfgBuilder]: Performing block encoding [2022-11-21 13:57:00,304 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-21 13:57:00,304 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-21 13:57:00,311 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:57:00 BoogieIcfgContainer [2022-11-21 13:57:00,311 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-21 13:57:00,313 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-21 13:57:00,314 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-21 13:57:00,321 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-21 13:57:00,321 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 01:56:58" (1/3) ... [2022-11-21 13:57:00,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78b294a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:57:00, skipping insertion in model container [2022-11-21 13:57:00,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 01:56:59" (2/3) ... [2022-11-21 13:57:00,322 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@78b294a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 01:57:00, skipping insertion in model container [2022-11-21 13:57:00,322 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 01:57:00" (3/3) ... [2022-11-21 13:57:00,327 INFO L112 eAbstractionObserver]: Analyzing ICFG stack-1.i [2022-11-21 13:57:00,338 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-21 13:57:00,350 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-21 13:57:00,350 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-21 13:57:00,351 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-21 13:57:00,521 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-21 13:57:00,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 171 places, 174 transitions, 364 flow [2022-11-21 13:57:00,705 INFO L130 PetriNetUnfolder]: 10/172 cut-off events. [2022-11-21 13:57:00,705 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-21 13:57:00,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 181 conditions, 172 events. 10/172 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 416 event pairs, 0 based on Foata normal form. 0/160 useless extension candidates. Maximal degree in co-relation 126. Up to 3 conditions per place. [2022-11-21 13:57:00,714 INFO L82 GeneralOperation]: Start removeDead. Operand has 171 places, 174 transitions, 364 flow [2022-11-21 13:57:00,719 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 159 places, 162 transitions, 333 flow [2022-11-21 13:57:00,734 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-21 13:57:00,744 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;@2d76353c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-21 13:57:00,745 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-21 13:57:00,806 INFO L130 PetriNetUnfolder]: 5/131 cut-off events. [2022-11-21 13:57:00,806 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-21 13:57:00,806 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:57:00,807 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] [2022-11-21 13:57:00,808 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 13:57:00,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:00,816 INFO L85 PathProgramCache]: Analyzing trace with hash -960596963, now seen corresponding path program 1 times [2022-11-21 13:57:00,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:00,827 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374924049] [2022-11-21 13:57:00,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:00,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:01,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:01,375 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:57:01,375 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:57:01,376 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374924049] [2022-11-21 13:57:01,376 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1374924049] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:57:01,377 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:57:01,377 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:57:01,379 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346249108] [2022-11-21 13:57:01,379 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:57:01,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 13:57:01,393 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:57:01,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 13:57:01,439 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:57:01,443 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 174 [2022-11-21 13:57:01,447 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 162 transitions, 333 flow. Second operand has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:01,447 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:57:01,447 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 174 [2022-11-21 13:57:01,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:57:01,635 INFO L130 PetriNetUnfolder]: 88/701 cut-off events. [2022-11-21 13:57:01,636 INFO L131 PetriNetUnfolder]: For 43/43 co-relation queries the response was YES. [2022-11-21 13:57:01,641 INFO L83 FinitePrefix]: Finished finitePrefix Result has 884 conditions, 701 events. 88/701 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 3108 event pairs, 32 based on Foata normal form. 69/704 useless extension candidates. Maximal degree in co-relation 747. Up to 111 conditions per place. [2022-11-21 13:57:01,645 INFO L137 encePairwiseOnDemand]: 164/174 looper letters, 20 selfloop transitions, 3 changer transitions 0/160 dead transitions. [2022-11-21 13:57:01,645 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 160 transitions, 381 flow [2022-11-21 13:57:01,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 13:57:01,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-21 13:57:01,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 485 transitions. [2022-11-21 13:57:01,660 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9291187739463601 [2022-11-21 13:57:01,661 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 485 transitions. [2022-11-21 13:57:01,661 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 485 transitions. [2022-11-21 13:57:01,663 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:57:01,666 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 485 transitions. [2022-11-21 13:57:01,669 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 161.66666666666666) internal successors, (485), 3 states have internal predecessors, (485), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:01,676 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 174.0) internal successors, (696), 4 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) [2022-11-21 13:57:01,677 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 174.0) internal successors, (696), 4 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) [2022-11-21 13:57:01,678 INFO L175 Difference]: Start difference. First operand has 159 places, 162 transitions, 333 flow. Second operand 3 states and 485 transitions. [2022-11-21 13:57:01,680 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 160 transitions, 381 flow [2022-11-21 13:57:01,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 160 transitions, 373 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-21 13:57:01,687 INFO L231 Difference]: Finished difference. Result has 155 places, 154 transitions, 327 flow [2022-11-21 13:57:01,689 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=310, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=327, PETRI_PLACES=155, PETRI_TRANSITIONS=154} [2022-11-21 13:57:01,693 INFO L288 CegarLoopForPetriNet]: 159 programPoint places, -4 predicate places. [2022-11-21 13:57:01,693 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 154 transitions, 327 flow [2022-11-21 13:57:01,694 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:01,694 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:57:01,694 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, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:57:01,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-21 13:57:01,695 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 13:57:01,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:01,696 INFO L85 PathProgramCache]: Analyzing trace with hash -1002901647, now seen corresponding path program 1 times [2022-11-21 13:57:01,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:01,696 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958300842] [2022-11-21 13:57:01,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:01,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:01,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:01,881 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:57:01,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:57:01,881 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958300842] [2022-11-21 13:57:01,882 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958300842] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:57:01,882 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:57:01,882 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-21 13:57:01,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [760694661] [2022-11-21 13:57:01,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:57:01,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-21 13:57:01,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:57:01,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-21 13:57:01,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-21 13:57:01,886 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 154 out of 174 [2022-11-21 13:57:01,887 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 154 transitions, 327 flow. Second operand has 4 states, 4 states have (on average 155.75) internal successors, (623), 4 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:01,888 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:57:01,888 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 154 of 174 [2022-11-21 13:57:01,888 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:57:02,035 INFO L130 PetriNetUnfolder]: 34/592 cut-off events. [2022-11-21 13:57:02,035 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-11-21 13:57:02,038 INFO L83 FinitePrefix]: Finished finitePrefix Result has 713 conditions, 592 events. 34/592 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2029 event pairs, 11 based on Foata normal form. 0/555 useless extension candidates. Maximal degree in co-relation 411. Up to 45 conditions per place. [2022-11-21 13:57:02,041 INFO L137 encePairwiseOnDemand]: 169/174 looper letters, 16 selfloop transitions, 4 changer transitions 0/162 dead transitions. [2022-11-21 13:57:02,041 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 158 places, 162 transitions, 388 flow [2022-11-21 13:57:02,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-21 13:57:02,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-21 13:57:02,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 637 transitions. [2022-11-21 13:57:02,044 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9152298850574713 [2022-11-21 13:57:02,044 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 637 transitions. [2022-11-21 13:57:02,044 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 637 transitions. [2022-11-21 13:57:02,045 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:57:02,045 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 637 transitions. [2022-11-21 13:57:02,070 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 159.25) internal successors, (637), 4 states have internal predecessors, (637), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:02,074 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 174.0) internal successors, (870), 5 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:02,074 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 174.0) internal successors, (870), 5 states have internal predecessors, (870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:02,075 INFO L175 Difference]: Start difference. First operand has 155 places, 154 transitions, 327 flow. Second operand 4 states and 637 transitions. [2022-11-21 13:57:02,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 158 places, 162 transitions, 388 flow [2022-11-21 13:57:02,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 162 transitions, 385 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 13:57:02,080 INFO L231 Difference]: Finished difference. Result has 159 places, 157 transitions, 352 flow [2022-11-21 13:57:02,081 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=352, PETRI_PLACES=159, PETRI_TRANSITIONS=157} [2022-11-21 13:57:02,082 INFO L288 CegarLoopForPetriNet]: 159 programPoint places, 0 predicate places. [2022-11-21 13:57:02,082 INFO L495 AbstractCegarLoop]: Abstraction has has 159 places, 157 transitions, 352 flow [2022-11-21 13:57:02,082 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 155.75) internal successors, (623), 4 states have internal predecessors, (623), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:02,083 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:57:02,083 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:57:02,083 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-21 13:57:02,083 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 13:57:02,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:02,084 INFO L85 PathProgramCache]: Analyzing trace with hash 250085817, now seen corresponding path program 1 times [2022-11-21 13:57:02,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:02,084 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269572852] [2022-11-21 13:57:02,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:02,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:02,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:02,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:57:02,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:57:02,188 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269572852] [2022-11-21 13:57:02,189 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269572852] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:57:02,189 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:57:02,189 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:57:02,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1770723571] [2022-11-21 13:57:02,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:57:02,190 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 13:57:02,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:57:02,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 13:57:02,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:57:02,192 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 174 [2022-11-21 13:57:02,192 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 159 places, 157 transitions, 352 flow. Second operand has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:02,193 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:57:02,193 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 174 [2022-11-21 13:57:02,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:57:02,477 INFO L130 PetriNetUnfolder]: 127/1269 cut-off events. [2022-11-21 13:57:02,478 INFO L131 PetriNetUnfolder]: For 90/100 co-relation queries the response was YES. [2022-11-21 13:57:02,484 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1674 conditions, 1269 events. 127/1269 cut-off events. For 90/100 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 6926 event pairs, 33 based on Foata normal form. 12/1207 useless extension candidates. Maximal degree in co-relation 1334. Up to 135 conditions per place. [2022-11-21 13:57:02,489 INFO L137 encePairwiseOnDemand]: 168/174 looper letters, 25 selfloop transitions, 4 changer transitions 0/169 dead transitions. [2022-11-21 13:57:02,490 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 161 places, 169 transitions, 443 flow [2022-11-21 13:57:02,490 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 13:57:02,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-21 13:57:02,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 480 transitions. [2022-11-21 13:57:02,492 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9195402298850575 [2022-11-21 13:57:02,493 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 480 transitions. [2022-11-21 13:57:02,493 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 480 transitions. [2022-11-21 13:57:02,493 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:57:02,494 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 480 transitions. [2022-11-21 13:57:02,495 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 160.0) internal successors, (480), 3 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) [2022-11-21 13:57:02,496 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 174.0) internal successors, (696), 4 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) [2022-11-21 13:57:02,497 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 174.0) internal successors, (696), 4 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) [2022-11-21 13:57:02,498 INFO L175 Difference]: Start difference. First operand has 159 places, 157 transitions, 352 flow. Second operand 3 states and 480 transitions. [2022-11-21 13:57:02,498 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 161 places, 169 transitions, 443 flow [2022-11-21 13:57:02,502 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 160 places, 169 transitions, 441 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 13:57:02,505 INFO L231 Difference]: Finished difference. Result has 162 places, 161 transitions, 392 flow [2022-11-21 13:57:02,505 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=392, PETRI_PLACES=162, PETRI_TRANSITIONS=161} [2022-11-21 13:57:02,507 INFO L288 CegarLoopForPetriNet]: 159 programPoint places, 3 predicate places. [2022-11-21 13:57:02,507 INFO L495 AbstractCegarLoop]: Abstraction has has 162 places, 161 transitions, 392 flow [2022-11-21 13:57:02,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 153.0) internal successors, (459), 3 states have internal predecessors, (459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:02,508 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:57:02,509 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:57:02,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-21 13:57:02,510 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 13:57:02,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:02,511 INFO L85 PathProgramCache]: Analyzing trace with hash -651773485, now seen corresponding path program 1 times [2022-11-21 13:57:02,511 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:02,511 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256804434] [2022-11-21 13:57:02,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:02,511 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:02,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:02,928 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:57:02,928 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:57:02,928 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256804434] [2022-11-21 13:57:02,929 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256804434] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:57:02,929 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [728827991] [2022-11-21 13:57:02,929 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:02,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:57:02,930 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27e08c94-12c7-40c2-8f1c-60d2acc285a1/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:57:02,937 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27e08c94-12c7-40c2-8f1c-60d2acc285a1/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:57:02,941 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27e08c94-12c7-40c2-8f1c-60d2acc285a1/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-21 13:57:03,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:03,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-21 13:57:03,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:57:03,349 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:57:03,350 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:57:03,523 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:57:03,523 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [728827991] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:57:03,523 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:57:03,524 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-21 13:57:03,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342055898] [2022-11-21 13:57:03,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:57:03,525 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-21 13:57:03,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:57:03,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-21 13:57:03,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-21 13:57:03,528 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 174 [2022-11-21 13:57:03,531 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 161 transitions, 392 flow. Second operand has 10 states, 10 states have (on average 150.5) internal successors, (1505), 10 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:03,531 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:57:03,531 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 174 [2022-11-21 13:57:03,531 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:57:04,222 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([468] L1009-->L1011: Formula: (< 0 v_~top~0_7) InVars {~top~0=v_~top~0_7} OutVars{~top~0=v_~top~0_7} AuxVars[] AssignedVars[][182], [Black: 188#true, 30#L1023-4true, Black: 176#(= ~top~0 0), 114#L1011true, 194#true, 32#L946-2true, 190#(<= 1 ~top~0), Black: 181#(= |t1Thread1of1ForFork0_push_#res#1| 0), Black: 184#(and (= |t1Thread1of1ForFork0_push_#res#1| 0) (= |t1Thread1of1ForFork0_#t~ret41#1| 0)), t2Thread1of1ForFork1InUse]) [2022-11-21 13:57:04,223 INFO L383 tUnfolder$Statistics]: this new event has 187 ancestors and is cut-off event [2022-11-21 13:57:04,227 INFO L386 tUnfolder$Statistics]: existing Event has 166 ancestors and is cut-off event [2022-11-21 13:57:04,227 INFO L386 tUnfolder$Statistics]: existing Event has 167 ancestors and is cut-off event [2022-11-21 13:57:04,228 INFO L386 tUnfolder$Statistics]: existing Event has 159 ancestors and is cut-off event [2022-11-21 13:57:04,228 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([469] L1009-->L1009-1: Formula: (not (< 0 v_~top~0_13)) InVars {~top~0=v_~top~0_13} OutVars{~top~0=v_~top~0_13} AuxVars[] AssignedVars[][183], [Black: 190#(<= 1 ~top~0), 30#L1023-4true, Black: 176#(= ~top~0 0), 85#L1009-1true, 32#L946-2true, Black: 181#(= |t1Thread1of1ForFork0_push_#res#1| 0), Black: 184#(and (= |t1Thread1of1ForFork0_push_#res#1| 0) (= |t1Thread1of1ForFork0_#t~ret41#1| 0)), 226#(<= ~top~0 0), t2Thread1of1ForFork1InUse, 188#true]) [2022-11-21 13:57:04,228 INFO L383 tUnfolder$Statistics]: this new event has 187 ancestors and is cut-off event [2022-11-21 13:57:04,228 INFO L386 tUnfolder$Statistics]: existing Event has 166 ancestors and is cut-off event [2022-11-21 13:57:04,230 INFO L386 tUnfolder$Statistics]: existing Event has 167 ancestors and is cut-off event [2022-11-21 13:57:04,230 INFO L386 tUnfolder$Statistics]: existing Event has 159 ancestors and is cut-off event [2022-11-21 13:57:04,337 INFO L130 PetriNetUnfolder]: 388/2721 cut-off events. [2022-11-21 13:57:04,342 INFO L131 PetriNetUnfolder]: For 980/1066 co-relation queries the response was YES. [2022-11-21 13:57:04,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4165 conditions, 2721 events. 388/2721 cut-off events. For 980/1066 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 19094 event pairs, 64 based on Foata normal form. 38/2611 useless extension candidates. Maximal degree in co-relation 3627. Up to 300 conditions per place. [2022-11-21 13:57:04,365 INFO L137 encePairwiseOnDemand]: 165/174 looper letters, 86 selfloop transitions, 46 changer transitions 1/271 dead transitions. [2022-11-21 13:57:04,365 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 271 transitions, 1074 flow [2022-11-21 13:57:04,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-21 13:57:04,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-21 13:57:04,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2795 transitions. [2022-11-21 13:57:04,371 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8924010217113666 [2022-11-21 13:57:04,372 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2795 transitions. [2022-11-21 13:57:04,372 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2795 transitions. [2022-11-21 13:57:04,374 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:57:04,374 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2795 transitions. [2022-11-21 13:57:04,380 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 155.27777777777777) internal successors, (2795), 18 states have internal predecessors, (2795), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:04,388 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 174.0) internal successors, (3306), 19 states have internal predecessors, (3306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:04,390 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 174.0) internal successors, (3306), 19 states have internal predecessors, (3306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:04,391 INFO L175 Difference]: Start difference. First operand has 162 places, 161 transitions, 392 flow. Second operand 18 states and 2795 transitions. [2022-11-21 13:57:04,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 271 transitions, 1074 flow [2022-11-21 13:57:04,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 271 transitions, 1012 flow, removed 6 selfloop flow, removed 2 redundant places. [2022-11-21 13:57:04,399 INFO L231 Difference]: Finished difference. Result has 183 places, 216 transitions, 763 flow [2022-11-21 13:57:04,400 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=160, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=161, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=151, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=763, PETRI_PLACES=183, PETRI_TRANSITIONS=216} [2022-11-21 13:57:04,401 INFO L288 CegarLoopForPetriNet]: 159 programPoint places, 24 predicate places. [2022-11-21 13:57:04,401 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 216 transitions, 763 flow [2022-11-21 13:57:04,402 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 150.5) internal successors, (1505), 10 states have internal predecessors, (1505), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:04,402 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:57:04,402 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:57:04,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27e08c94-12c7-40c2-8f1c-60d2acc285a1/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2022-11-21 13:57:04,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27e08c94-12c7-40c2-8f1c-60d2acc285a1/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:57:04,608 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 13:57:04,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:04,609 INFO L85 PathProgramCache]: Analyzing trace with hash 1513057004, now seen corresponding path program 1 times [2022-11-21 13:57:04,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:04,610 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1259332776] [2022-11-21 13:57:04,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:04,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:04,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:04,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:57:04,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:57:04,805 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1259332776] [2022-11-21 13:57:04,805 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1259332776] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:57:04,806 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:57:04,806 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-21 13:57:04,806 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406682132] [2022-11-21 13:57:04,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:57:04,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-21 13:57:04,807 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:57:04,807 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-21 13:57:04,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-21 13:57:04,808 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 152 out of 174 [2022-11-21 13:57:04,809 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 216 transitions, 763 flow. Second operand has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:04,809 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:57:04,809 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 152 of 174 [2022-11-21 13:57:04,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:57:05,025 INFO L130 PetriNetUnfolder]: 54/1109 cut-off events. [2022-11-21 13:57:05,025 INFO L131 PetriNetUnfolder]: For 239/239 co-relation queries the response was YES. [2022-11-21 13:57:05,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1518 conditions, 1109 events. 54/1109 cut-off events. For 239/239 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 4852 event pairs, 9 based on Foata normal form. 18/1084 useless extension candidates. Maximal degree in co-relation 1132. Up to 51 conditions per place. [2022-11-21 13:57:05,033 INFO L137 encePairwiseOnDemand]: 170/174 looper letters, 12 selfloop transitions, 4 changer transitions 0/175 dead transitions. [2022-11-21 13:57:05,033 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 175 transitions, 540 flow [2022-11-21 13:57:05,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-21 13:57:05,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-21 13:57:05,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 474 transitions. [2022-11-21 13:57:05,036 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9080459770114943 [2022-11-21 13:57:05,037 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 474 transitions. [2022-11-21 13:57:05,037 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 474 transitions. [2022-11-21 13:57:05,037 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:57:05,039 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 474 transitions. [2022-11-21 13:57:05,040 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 158.0) internal successors, (474), 3 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:05,041 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 174.0) internal successors, (696), 4 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) [2022-11-21 13:57:05,042 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 174.0) internal successors, (696), 4 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) [2022-11-21 13:57:05,042 INFO L175 Difference]: Start difference. First operand has 183 places, 216 transitions, 763 flow. Second operand 3 states and 474 transitions. [2022-11-21 13:57:05,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 175 transitions, 540 flow [2022-11-21 13:57:05,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 175 transitions, 518 flow, removed 9 selfloop flow, removed 4 redundant places. [2022-11-21 13:57:05,049 INFO L231 Difference]: Finished difference. Result has 173 places, 173 transitions, 487 flow [2022-11-21 13:57:05,050 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=479, PETRI_DIFFERENCE_MINUEND_PLACES=171, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=487, PETRI_PLACES=173, PETRI_TRANSITIONS=173} [2022-11-21 13:57:05,054 INFO L288 CegarLoopForPetriNet]: 159 programPoint places, 14 predicate places. [2022-11-21 13:57:05,054 INFO L495 AbstractCegarLoop]: Abstraction has has 173 places, 173 transitions, 487 flow [2022-11-21 13:57:05,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 155.66666666666666) internal successors, (467), 3 states have internal predecessors, (467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:05,055 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:57:05,055 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:57:05,055 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-21 13:57:05,056 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 13:57:05,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:05,056 INFO L85 PathProgramCache]: Analyzing trace with hash -1330472940, now seen corresponding path program 1 times [2022-11-21 13:57:05,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:05,057 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313779345] [2022-11-21 13:57:05,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:05,057 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:05,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:07,145 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:57:07,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:57:07,145 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313779345] [2022-11-21 13:57:07,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313779345] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:57:07,146 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:57:07,146 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2022-11-21 13:57:07,146 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152953594] [2022-11-21 13:57:07,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:57:07,147 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2022-11-21 13:57:07,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:57:07,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2022-11-21 13:57:07,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=487, Unknown=0, NotChecked=0, Total=552 [2022-11-21 13:57:07,151 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 174 [2022-11-21 13:57:07,153 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 173 places, 173 transitions, 487 flow. Second operand has 24 states, 24 states have (on average 97.54166666666667) internal successors, (2341), 24 states have internal predecessors, (2341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:07,154 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:57:07,154 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 174 [2022-11-21 13:57:07,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:57:12,279 INFO L130 PetriNetUnfolder]: 1122/4495 cut-off events. [2022-11-21 13:57:12,279 INFO L131 PetriNetUnfolder]: For 907/907 co-relation queries the response was YES. [2022-11-21 13:57:12,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8477 conditions, 4495 events. 1122/4495 cut-off events. For 907/907 co-relation queries the response was YES. Maximal size of possible extension queue 49. Compared 31915 event pairs, 171 based on Foata normal form. 20/4366 useless extension candidates. Maximal degree in co-relation 5125. Up to 1458 conditions per place. [2022-11-21 13:57:12,314 INFO L137 encePairwiseOnDemand]: 137/174 looper letters, 249 selfloop transitions, 59 changer transitions 33/425 dead transitions. [2022-11-21 13:57:12,314 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 216 places, 425 transitions, 1855 flow [2022-11-21 13:57:12,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-21 13:57:12,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-11-21 13:57:12,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 4491 transitions. [2022-11-21 13:57:12,336 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5865987460815048 [2022-11-21 13:57:12,336 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 4491 transitions. [2022-11-21 13:57:12,336 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 4491 transitions. [2022-11-21 13:57:12,342 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:57:12,342 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 4491 transitions. [2022-11-21 13:57:12,354 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 102.06818181818181) internal successors, (4491), 44 states have internal predecessors, (4491), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:12,367 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 174.0) internal successors, (7830), 45 states have internal predecessors, (7830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:12,371 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 174.0) internal successors, (7830), 45 states have internal predecessors, (7830), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:12,372 INFO L175 Difference]: Start difference. First operand has 173 places, 173 transitions, 487 flow. Second operand 44 states and 4491 transitions. [2022-11-21 13:57:12,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 216 places, 425 transitions, 1855 flow [2022-11-21 13:57:12,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 425 transitions, 1851 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-21 13:57:12,382 INFO L231 Difference]: Finished difference. Result has 254 places, 228 transitions, 970 flow [2022-11-21 13:57:12,383 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=483, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=173, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=970, PETRI_PLACES=254, PETRI_TRANSITIONS=228} [2022-11-21 13:57:12,384 INFO L288 CegarLoopForPetriNet]: 159 programPoint places, 95 predicate places. [2022-11-21 13:57:12,384 INFO L495 AbstractCegarLoop]: Abstraction has has 254 places, 228 transitions, 970 flow [2022-11-21 13:57:12,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 97.54166666666667) internal successors, (2341), 24 states have internal predecessors, (2341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:12,385 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:57:12,386 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:57:12,386 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-21 13:57:12,386 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 13:57:12,387 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:12,387 INFO L85 PathProgramCache]: Analyzing trace with hash 1077744856, now seen corresponding path program 2 times [2022-11-21 13:57:12,387 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:12,387 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608659657] [2022-11-21 13:57:12,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:12,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:12,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:14,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:57:14,724 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:57:14,724 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608659657] [2022-11-21 13:57:14,724 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1608659657] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:57:14,725 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:57:14,725 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [27] imperfect sequences [] total 27 [2022-11-21 13:57:14,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [213008306] [2022-11-21 13:57:14,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:57:14,726 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2022-11-21 13:57:14,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:57:14,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2022-11-21 13:57:14,727 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2022-11-21 13:57:14,729 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 174 [2022-11-21 13:57:14,731 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 254 places, 228 transitions, 970 flow. Second operand has 27 states, 27 states have (on average 86.55555555555556) internal successors, (2337), 27 states have internal predecessors, (2337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:14,731 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:57:14,731 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 174 [2022-11-21 13:57:14,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:57:20,051 INFO L130 PetriNetUnfolder]: 1753/7165 cut-off events. [2022-11-21 13:57:20,051 INFO L131 PetriNetUnfolder]: For 5339/5339 co-relation queries the response was YES. [2022-11-21 13:57:20,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16678 conditions, 7165 events. 1753/7165 cut-off events. For 5339/5339 co-relation queries the response was YES. Maximal size of possible extension queue 75. Compared 55330 event pairs, 450 based on Foata normal form. 14/7051 useless extension candidates. Maximal degree in co-relation 11061. Up to 2345 conditions per place. [2022-11-21 13:57:20,153 INFO L137 encePairwiseOnDemand]: 136/174 looper letters, 289 selfloop transitions, 61 changer transitions 26/452 dead transitions. [2022-11-21 13:57:20,153 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 452 transitions, 2763 flow [2022-11-21 13:57:20,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2022-11-21 13:57:20,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 35 states. [2022-11-21 13:57:20,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 3214 transitions. [2022-11-21 13:57:20,166 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5277504105090312 [2022-11-21 13:57:20,166 INFO L72 ComplementDD]: Start complementDD. Operand 35 states and 3214 transitions. [2022-11-21 13:57:20,167 INFO L73 IsDeterministic]: Start isDeterministic. Operand 35 states and 3214 transitions. [2022-11-21 13:57:20,169 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:57:20,170 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 35 states and 3214 transitions. [2022-11-21 13:57:20,180 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 36 states, 35 states have (on average 91.82857142857142) internal successors, (3214), 35 states have internal predecessors, (3214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:20,193 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 36 states, 36 states have (on average 174.0) internal successors, (6264), 36 states have internal predecessors, (6264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:20,195 INFO L81 ComplementDD]: Finished complementDD. Result has 36 states, 36 states have (on average 174.0) internal successors, (6264), 36 states have internal predecessors, (6264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:20,196 INFO L175 Difference]: Start difference. First operand has 254 places, 228 transitions, 970 flow. Second operand 35 states and 3214 transitions. [2022-11-21 13:57:20,196 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 452 transitions, 2763 flow [2022-11-21 13:57:20,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 452 transitions, 2751 flow, removed 4 selfloop flow, removed 2 redundant places. [2022-11-21 13:57:20,229 INFO L231 Difference]: Finished difference. Result has 302 places, 263 transitions, 1445 flow [2022-11-21 13:57:20,230 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=962, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=228, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=35, PETRI_FLOW=1445, PETRI_PLACES=302, PETRI_TRANSITIONS=263} [2022-11-21 13:57:20,231 INFO L288 CegarLoopForPetriNet]: 159 programPoint places, 143 predicate places. [2022-11-21 13:57:20,231 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 263 transitions, 1445 flow [2022-11-21 13:57:20,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 86.55555555555556) internal successors, (2337), 27 states have internal predecessors, (2337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:20,232 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:57:20,233 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:57:20,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-21 13:57:20,233 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 13:57:20,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:20,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1516631640, now seen corresponding path program 3 times [2022-11-21 13:57:20,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:20,238 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904197179] [2022-11-21 13:57:20,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:20,239 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:20,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:22,379 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:57:22,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:57:22,380 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904197179] [2022-11-21 13:57:22,380 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1904197179] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-21 13:57:22,380 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-21 13:57:22,380 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-11-21 13:57:22,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807274666] [2022-11-21 13:57:22,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:57:22,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-21 13:57:22,382 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:57:22,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-21 13:57:22,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2022-11-21 13:57:22,386 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 174 [2022-11-21 13:57:22,390 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 263 transitions, 1445 flow. Second operand has 29 states, 29 states have (on average 85.37931034482759) internal successors, (2476), 29 states have internal predecessors, (2476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:22,390 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:57:22,390 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 174 [2022-11-21 13:57:22,390 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:57:30,144 INFO L130 PetriNetUnfolder]: 2158/8856 cut-off events. [2022-11-21 13:57:30,144 INFO L131 PetriNetUnfolder]: For 9640/9643 co-relation queries the response was YES. [2022-11-21 13:57:30,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21725 conditions, 8856 events. 2158/8856 cut-off events. For 9640/9643 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 73501 event pairs, 288 based on Foata normal form. 33/8727 useless extension candidates. Maximal degree in co-relation 13612. Up to 1596 conditions per place. [2022-11-21 13:57:30,249 INFO L137 encePairwiseOnDemand]: 137/174 looper letters, 260 selfloop transitions, 127 changer transitions 33/496 dead transitions. [2022-11-21 13:57:30,249 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 347 places, 496 transitions, 3344 flow [2022-11-21 13:57:30,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2022-11-21 13:57:30,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2022-11-21 13:57:30,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 4133 transitions. [2022-11-21 13:57:30,257 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5163668165917041 [2022-11-21 13:57:30,258 INFO L72 ComplementDD]: Start complementDD. Operand 46 states and 4133 transitions. [2022-11-21 13:57:30,258 INFO L73 IsDeterministic]: Start isDeterministic. Operand 46 states and 4133 transitions. [2022-11-21 13:57:30,260 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:57:30,260 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 46 states and 4133 transitions. [2022-11-21 13:57:30,267 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 47 states, 46 states have (on average 89.84782608695652) internal successors, (4133), 46 states have internal predecessors, (4133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:30,278 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 47 states, 47 states have (on average 174.0) internal successors, (8178), 47 states have internal predecessors, (8178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:30,281 INFO L81 ComplementDD]: Finished complementDD. Result has 47 states, 47 states have (on average 174.0) internal successors, (8178), 47 states have internal predecessors, (8178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:30,282 INFO L175 Difference]: Start difference. First operand has 302 places, 263 transitions, 1445 flow. Second operand 46 states and 4133 transitions. [2022-11-21 13:57:30,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 347 places, 496 transitions, 3344 flow [2022-11-21 13:57:30,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 333 places, 496 transitions, 3291 flow, removed 7 selfloop flow, removed 14 redundant places. [2022-11-21 13:57:30,334 INFO L231 Difference]: Finished difference. Result has 360 places, 299 transitions, 2186 flow [2022-11-21 13:57:30,335 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=1393, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=263, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=91, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=2186, PETRI_PLACES=360, PETRI_TRANSITIONS=299} [2022-11-21 13:57:30,336 INFO L288 CegarLoopForPetriNet]: 159 programPoint places, 201 predicate places. [2022-11-21 13:57:30,336 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 299 transitions, 2186 flow [2022-11-21 13:57:30,337 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 85.37931034482759) internal successors, (2476), 29 states have internal predecessors, (2476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:30,337 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:57:30,338 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:57:30,338 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-21 13:57:30,338 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 13:57:30,339 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:30,339 INFO L85 PathProgramCache]: Analyzing trace with hash -1841304903, now seen corresponding path program 1 times [2022-11-21 13:57:30,339 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:30,339 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1481132246] [2022-11-21 13:57:30,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:30,340 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:30,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:32,547 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:57:32,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:57:32,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1481132246] [2022-11-21 13:57:32,548 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1481132246] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:57:32,548 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979656701] [2022-11-21 13:57:32,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:32,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:57:32,549 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27e08c94-12c7-40c2-8f1c-60d2acc285a1/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:57:32,550 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27e08c94-12c7-40c2-8f1c-60d2acc285a1/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:57:32,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27e08c94-12c7-40c2-8f1c-60d2acc285a1/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-21 13:57:32,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:32,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 350 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-21 13:57:32,726 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:57:34,414 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2022-11-21 13:57:35,859 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 23 [2022-11-21 13:57:36,135 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:57:36,135 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:57:36,978 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2022-11-21 13:57:37,665 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-21 13:57:37,666 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1979656701] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-21 13:57:37,666 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-21 13:57:37,666 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [26, 26] total 68 [2022-11-21 13:57:37,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939000541] [2022-11-21 13:57:37,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-21 13:57:37,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-21 13:57:37,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:57:37,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-21 13:57:37,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=241, Invalid=4315, Unknown=0, NotChecked=0, Total=4556 [2022-11-21 13:57:37,673 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 174 [2022-11-21 13:57:37,675 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 299 transitions, 2186 flow. Second operand has 22 states, 22 states have (on average 98.63636363636364) internal successors, (2170), 22 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:37,675 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:57:37,675 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 174 [2022-11-21 13:57:37,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:57:48,938 INFO L130 PetriNetUnfolder]: 3191/13218 cut-off events. [2022-11-21 13:57:48,938 INFO L131 PetriNetUnfolder]: For 24517/24520 co-relation queries the response was YES. [2022-11-21 13:57:49,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35868 conditions, 13218 events. 3191/13218 cut-off events. For 24517/24520 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 121561 event pairs, 433 based on Foata normal form. 9/12962 useless extension candidates. Maximal degree in co-relation 18638. Up to 1810 conditions per place. [2022-11-21 13:57:49,094 INFO L137 encePairwiseOnDemand]: 141/174 looper letters, 286 selfloop transitions, 255 changer transitions 3/628 dead transitions. [2022-11-21 13:57:49,094 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 424 places, 628 transitions, 5255 flow [2022-11-21 13:57:49,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2022-11-21 13:57:49,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2022-11-21 13:57:49,102 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 6504 transitions. [2022-11-21 13:57:49,105 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5750663129973475 [2022-11-21 13:57:49,105 INFO L72 ComplementDD]: Start complementDD. Operand 65 states and 6504 transitions. [2022-11-21 13:57:49,105 INFO L73 IsDeterministic]: Start isDeterministic. Operand 65 states and 6504 transitions. [2022-11-21 13:57:49,108 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:57:49,108 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 65 states and 6504 transitions. [2022-11-21 13:57:49,118 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 66 states, 65 states have (on average 100.06153846153846) internal successors, (6504), 65 states have internal predecessors, (6504), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:49,132 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 66 states, 66 states have (on average 174.0) internal successors, (11484), 66 states have internal predecessors, (11484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:49,136 INFO L81 ComplementDD]: Finished complementDD. Result has 66 states, 66 states have (on average 174.0) internal successors, (11484), 66 states have internal predecessors, (11484), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:49,136 INFO L175 Difference]: Start difference. First operand has 360 places, 299 transitions, 2186 flow. Second operand 65 states and 6504 transitions. [2022-11-21 13:57:49,137 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 424 places, 628 transitions, 5255 flow [2022-11-21 13:57:49,271 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 628 transitions, 4896 flow, removed 154 selfloop flow, removed 18 redundant places. [2022-11-21 13:57:49,280 INFO L231 Difference]: Finished difference. Result has 423 places, 449 transitions, 3980 flow [2022-11-21 13:57:49,281 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=2006, PETRI_DIFFERENCE_MINUEND_PLACES=342, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=148, PETRI_DIFFERENCE_SUBTRAHEND_STATES=65, PETRI_FLOW=3980, PETRI_PLACES=423, PETRI_TRANSITIONS=449} [2022-11-21 13:57:49,281 INFO L288 CegarLoopForPetriNet]: 159 programPoint places, 264 predicate places. [2022-11-21 13:57:49,282 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 449 transitions, 3980 flow [2022-11-21 13:57:49,282 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 98.63636363636364) internal successors, (2170), 22 states have internal predecessors, (2170), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:49,283 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:57:49,283 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:57:49,296 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27e08c94-12c7-40c2-8f1c-60d2acc285a1/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-21 13:57:49,489 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27e08c94-12c7-40c2-8f1c-60d2acc285a1/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-21 13:57:49,490 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 13:57:49,490 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:57:49,490 INFO L85 PathProgramCache]: Analyzing trace with hash 1274399427, now seen corresponding path program 2 times [2022-11-21 13:57:49,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:57:49,490 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [462728376] [2022-11-21 13:57:49,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:57:49,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:57:49,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:57:52,155 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:57:52,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:57:52,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [462728376] [2022-11-21 13:57:52,156 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [462728376] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:57:52,156 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1221188813] [2022-11-21 13:57:52,156 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 13:57:52,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:57:52,157 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27e08c94-12c7-40c2-8f1c-60d2acc285a1/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:57:52,159 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27e08c94-12c7-40c2-8f1c-60d2acc285a1/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:57:52,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27e08c94-12c7-40c2-8f1c-60d2acc285a1/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-21 13:57:52,285 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-21 13:57:52,285 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 13:57:52,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-21 13:57:52,298 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:57:52,453 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-21 13:57:52,454 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-21 13:57:52,468 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-21 13:57:52,469 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-21 13:57:53,598 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2022-11-21 13:57:53,775 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 54 [2022-11-21 13:57:54,984 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 23 [2022-11-21 13:57:55,283 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-21 13:57:55,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:57:56,407 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 13:57:56,407 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-11-21 13:57:56,418 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 13:57:56,419 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2022-11-21 13:57:56,439 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-11-21 13:57:57,825 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-21 13:57:57,826 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-11-21 13:57:57,830 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-21 13:57:57,832 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1221188813] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:57:57,832 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:57:57,832 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 26, 26] total 74 [2022-11-21 13:57:57,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2020906087] [2022-11-21 13:57:57,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:57:57,834 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 74 states [2022-11-21 13:57:57,834 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:57:57,835 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 74 interpolants. [2022-11-21 13:57:57,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=243, Invalid=5147, Unknown=12, NotChecked=0, Total=5402 [2022-11-21 13:57:57,843 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 84 out of 174 [2022-11-21 13:57:57,849 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 449 transitions, 3980 flow. Second operand has 74 states, 74 states have (on average 87.39189189189189) internal successors, (6467), 74 states have internal predecessors, (6467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:57:57,849 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:57:57,849 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 84 of 174 [2022-11-21 13:57:57,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:58:59,073 INFO L130 PetriNetUnfolder]: 4359/17790 cut-off events. [2022-11-21 13:58:59,073 INFO L131 PetriNetUnfolder]: For 37804/37811 co-relation queries the response was YES. [2022-11-21 13:58:59,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50938 conditions, 17790 events. 4359/17790 cut-off events. For 37804/37811 co-relation queries the response was YES. Maximal size of possible extension queue 238. Compared 178434 event pairs, 188 based on Foata normal form. 20/17493 useless extension candidates. Maximal degree in co-relation 42154. Up to 2502 conditions per place. [2022-11-21 13:58:59,362 INFO L137 encePairwiseOnDemand]: 134/174 looper letters, 484 selfloop transitions, 526 changer transitions 22/1108 dead transitions. [2022-11-21 13:58:59,362 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 571 places, 1108 transitions, 9940 flow [2022-11-21 13:58:59,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 149 states. [2022-11-21 13:58:59,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2022-11-21 13:58:59,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 13164 transitions. [2022-11-21 13:58:59,395 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5077528349919 [2022-11-21 13:58:59,395 INFO L72 ComplementDD]: Start complementDD. Operand 149 states and 13164 transitions. [2022-11-21 13:58:59,395 INFO L73 IsDeterministic]: Start isDeterministic. Operand 149 states and 13164 transitions. [2022-11-21 13:58:59,401 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:58:59,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 149 states and 13164 transitions. [2022-11-21 13:58:59,427 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 150 states, 149 states have (on average 88.3489932885906) internal successors, (13164), 149 states have internal predecessors, (13164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:58:59,465 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 150 states, 150 states have (on average 174.0) internal successors, (26100), 150 states have internal predecessors, (26100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:58:59,476 INFO L81 ComplementDD]: Finished complementDD. Result has 150 states, 150 states have (on average 174.0) internal successors, (26100), 150 states have internal predecessors, (26100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:58:59,476 INFO L175 Difference]: Start difference. First operand has 423 places, 449 transitions, 3980 flow. Second operand 149 states and 13164 transitions. [2022-11-21 13:58:59,476 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 571 places, 1108 transitions, 9940 flow [2022-11-21 13:58:59,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 562 places, 1108 transitions, 8916 flow, removed 482 selfloop flow, removed 9 redundant places. [2022-11-21 13:58:59,829 INFO L231 Difference]: Finished difference. Result has 580 places, 705 transitions, 6763 flow [2022-11-21 13:58:59,831 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=3524, PETRI_DIFFERENCE_MINUEND_PLACES=414, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=449, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=281, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=149, PETRI_FLOW=6763, PETRI_PLACES=580, PETRI_TRANSITIONS=705} [2022-11-21 13:58:59,832 INFO L288 CegarLoopForPetriNet]: 159 programPoint places, 421 predicate places. [2022-11-21 13:58:59,833 INFO L495 AbstractCegarLoop]: Abstraction has has 580 places, 705 transitions, 6763 flow [2022-11-21 13:58:59,835 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 74 states, 74 states have (on average 87.39189189189189) internal successors, (6467), 74 states have internal predecessors, (6467), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:58:59,835 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:58:59,835 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:58:59,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27e08c94-12c7-40c2-8f1c-60d2acc285a1/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-21 13:59:00,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27e08c94-12c7-40c2-8f1c-60d2acc285a1/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2022-11-21 13:59:00,042 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 13:59:00,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:59:00,043 INFO L85 PathProgramCache]: Analyzing trace with hash -738070129, now seen corresponding path program 1 times [2022-11-21 13:59:00,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:59:00,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1784488548] [2022-11-21 13:59:00,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:59:00,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:59:00,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:00,274 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-21 13:59:00,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:59:00,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1784488548] [2022-11-21 13:59:00,275 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1784488548] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:59:00,275 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446529521] [2022-11-21 13:59:00,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:59:00,275 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:59:00,276 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27e08c94-12c7-40c2-8f1c-60d2acc285a1/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:59:00,279 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27e08c94-12c7-40c2-8f1c-60d2acc285a1/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:59:00,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27e08c94-12c7-40c2-8f1c-60d2acc285a1/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-21 13:59:00,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:00,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 407 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-21 13:59:00,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:59:00,685 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-21 13:59:00,686 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:59:00,990 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-21 13:59:00,990 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446529521] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:59:00,990 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:59:00,990 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-11-21 13:59:00,991 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860368996] [2022-11-21 13:59:00,991 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:59:00,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-21 13:59:00,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:59:00,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-21 13:59:00,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-11-21 13:59:00,994 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 174 [2022-11-21 13:59:00,996 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 580 places, 705 transitions, 6763 flow. Second operand has 16 states, 16 states have (on average 149.375) internal successors, (2390), 16 states have internal predecessors, (2390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:59:00,997 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:59:00,997 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 174 [2022-11-21 13:59:00,997 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:59:04,605 INFO L130 PetriNetUnfolder]: 693/8437 cut-off events. [2022-11-21 13:59:04,605 INFO L131 PetriNetUnfolder]: For 21843/21844 co-relation queries the response was YES. [2022-11-21 13:59:04,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23438 conditions, 8437 events. 693/8437 cut-off events. For 21843/21844 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 75644 event pairs, 164 based on Foata normal form. 26/8274 useless extension candidates. Maximal degree in co-relation 21361. Up to 345 conditions per place. [2022-11-21 13:59:04,720 INFO L137 encePairwiseOnDemand]: 164/174 looper letters, 120 selfloop transitions, 203 changer transitions 1/806 dead transitions. [2022-11-21 13:59:04,720 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 596 places, 806 transitions, 8230 flow [2022-11-21 13:59:04,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-21 13:59:04,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-21 13:59:04,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3302 transitions. [2022-11-21 13:59:04,727 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8625914315569488 [2022-11-21 13:59:04,727 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3302 transitions. [2022-11-21 13:59:04,727 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3302 transitions. [2022-11-21 13:59:04,729 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 13:59:04,729 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3302 transitions. [2022-11-21 13:59:04,735 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 150.0909090909091) internal successors, (3302), 22 states have internal predecessors, (3302), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:59:04,740 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 174.0) internal successors, (4002), 23 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) [2022-11-21 13:59:04,741 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 174.0) internal successors, (4002), 23 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) [2022-11-21 13:59:04,742 INFO L175 Difference]: Start difference. First operand has 580 places, 705 transitions, 6763 flow. Second operand 22 states and 3302 transitions. [2022-11-21 13:59:04,742 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 596 places, 806 transitions, 8230 flow [2022-11-21 13:59:04,969 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 569 places, 806 transitions, 7399 flow, removed 246 selfloop flow, removed 27 redundant places. [2022-11-21 13:59:04,985 INFO L231 Difference]: Finished difference. Result has 574 places, 738 transitions, 6853 flow [2022-11-21 13:59:04,986 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=5964, PETRI_DIFFERENCE_MINUEND_PLACES=548, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=700, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=166, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=6853, PETRI_PLACES=574, PETRI_TRANSITIONS=738} [2022-11-21 13:59:04,987 INFO L288 CegarLoopForPetriNet]: 159 programPoint places, 415 predicate places. [2022-11-21 13:59:04,987 INFO L495 AbstractCegarLoop]: Abstraction has has 574 places, 738 transitions, 6853 flow [2022-11-21 13:59:04,988 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 149.375) internal successors, (2390), 16 states have internal predecessors, (2390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:59:04,988 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 13:59:04,988 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 13:59:05,002 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27e08c94-12c7-40c2-8f1c-60d2acc285a1/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-21 13:59:05,194 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27e08c94-12c7-40c2-8f1c-60d2acc285a1/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:59:05,195 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 13:59:05,195 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 13:59:05,196 INFO L85 PathProgramCache]: Analyzing trace with hash 2061411012, now seen corresponding path program 1 times [2022-11-21 13:59:05,196 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 13:59:05,196 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026907618] [2022-11-21 13:59:05,196 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:59:05,196 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 13:59:05,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:08,146 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:59:08,146 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 13:59:08,146 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026907618] [2022-11-21 13:59:08,146 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026907618] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 13:59:08,147 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1038186717] [2022-11-21 13:59:08,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 13:59:08,147 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 13:59:08,147 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27e08c94-12c7-40c2-8f1c-60d2acc285a1/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 13:59:08,151 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27e08c94-12c7-40c2-8f1c-60d2acc285a1/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 13:59:08,178 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27e08c94-12c7-40c2-8f1c-60d2acc285a1/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-21 13:59:08,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 13:59:08,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-21 13:59:08,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 13:59:09,487 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2022-11-21 13:59:11,019 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 13:59:11,020 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 38 [2022-11-21 13:59:13,228 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 23 [2022-11-21 13:59:13,506 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 5 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:59:13,506 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 13:59:16,649 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 48 [2022-11-21 13:59:18,013 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 13:59:18,014 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1038186717] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 13:59:18,014 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 13:59:18,014 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 34, 32] total 91 [2022-11-21 13:59:18,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1571558788] [2022-11-21 13:59:18,015 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 13:59:18,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2022-11-21 13:59:18,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 13:59:18,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2022-11-21 13:59:18,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=673, Invalid=7517, Unknown=0, NotChecked=0, Total=8190 [2022-11-21 13:59:18,026 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 174 [2022-11-21 13:59:18,032 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 574 places, 738 transitions, 6853 flow. Second operand has 91 states, 91 states have (on average 98.31868131868131) internal successors, (8947), 91 states have internal predecessors, (8947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 13:59:18,032 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 13:59:18,033 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 174 [2022-11-21 13:59:18,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-21 13:59:56,525 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2022-11-21 14:00:32,641 INFO L130 PetriNetUnfolder]: 7599/30685 cut-off events. [2022-11-21 14:00:32,641 INFO L131 PetriNetUnfolder]: For 67917/67925 co-relation queries the response was YES. [2022-11-21 14:00:33,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89756 conditions, 30685 events. 7599/30685 cut-off events. For 67917/67925 co-relation queries the response was YES. Maximal size of possible extension queue 289. Compared 320705 event pairs, 1290 based on Foata normal form. 129/30289 useless extension candidates. Maximal degree in co-relation 83897. Up to 5563 conditions per place. [2022-11-21 14:00:33,349 INFO L137 encePairwiseOnDemand]: 134/174 looper letters, 1315 selfloop transitions, 797 changer transitions 150/2346 dead transitions. [2022-11-21 14:00:33,350 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 760 places, 2346 transitions, 22701 flow [2022-11-21 14:00:33,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 187 states. [2022-11-21 14:00:33,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 187 states. [2022-11-21 14:00:33,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 18757 transitions. [2022-11-21 14:00:33,538 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5764644415760034 [2022-11-21 14:00:33,539 INFO L72 ComplementDD]: Start complementDD. Operand 187 states and 18757 transitions. [2022-11-21 14:00:33,539 INFO L73 IsDeterministic]: Start isDeterministic. Operand 187 states and 18757 transitions. [2022-11-21 14:00:33,545 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-21 14:00:33,545 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 187 states and 18757 transitions. [2022-11-21 14:00:33,572 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 188 states, 187 states have (on average 100.3048128342246) internal successors, (18757), 187 states have internal predecessors, (18757), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:00:33,605 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 188 states, 188 states have (on average 174.0) internal successors, (32712), 188 states have internal predecessors, (32712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:00:33,612 INFO L81 ComplementDD]: Finished complementDD. Result has 188 states, 188 states have (on average 174.0) internal successors, (32712), 188 states have internal predecessors, (32712), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:00:33,612 INFO L175 Difference]: Start difference. First operand has 574 places, 738 transitions, 6853 flow. Second operand 187 states and 18757 transitions. [2022-11-21 14:00:33,613 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 760 places, 2346 transitions, 22701 flow [2022-11-21 14:00:34,086 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 752 places, 2346 transitions, 22239 flow, removed 152 selfloop flow, removed 8 redundant places. [2022-11-21 14:00:34,109 INFO L231 Difference]: Finished difference. Result has 859 places, 1359 transitions, 15846 flow [2022-11-21 14:00:34,110 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=174, PETRI_DIFFERENCE_MINUEND_FLOW=6615, PETRI_DIFFERENCE_MINUEND_PLACES=566, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=738, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=261, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=312, PETRI_DIFFERENCE_SUBTRAHEND_STATES=187, PETRI_FLOW=15846, PETRI_PLACES=859, PETRI_TRANSITIONS=1359} [2022-11-21 14:00:34,111 INFO L288 CegarLoopForPetriNet]: 159 programPoint places, 700 predicate places. [2022-11-21 14:00:34,111 INFO L495 AbstractCegarLoop]: Abstraction has has 859 places, 1359 transitions, 15846 flow [2022-11-21 14:00:34,113 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 98.31868131868131) internal successors, (8947), 91 states have internal predecessors, (8947), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:00:34,113 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-21 14:00:34,113 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-21 14:00:34,118 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27e08c94-12c7-40c2-8f1c-60d2acc285a1/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-21 14:00:34,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27e08c94-12c7-40c2-8f1c-60d2acc285a1/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-21 14:00:34,315 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-21 14:00:34,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-21 14:00:34,315 INFO L85 PathProgramCache]: Analyzing trace with hash -401109678, now seen corresponding path program 2 times [2022-11-21 14:00:34,315 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-21 14:00:34,315 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152858348] [2022-11-21 14:00:34,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-21 14:00:34,316 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-21 14:00:34,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-21 14:00:37,250 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 14:00:37,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-21 14:00:37,250 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152858348] [2022-11-21 14:00:37,250 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152858348] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-21 14:00:37,251 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [788361416] [2022-11-21 14:00:37,251 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-21 14:00:37,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-21 14:00:37,251 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27e08c94-12c7-40c2-8f1c-60d2acc285a1/bin/uautomizer-vX5HgA9Q3a/z3 [2022-11-21 14:00:37,252 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27e08c94-12c7-40c2-8f1c-60d2acc285a1/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-21 14:00:37,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_27e08c94-12c7-40c2-8f1c-60d2acc285a1/bin/uautomizer-vX5HgA9Q3a/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-21 14:00:37,488 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-21 14:00:37,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-21 14:00:37,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 412 conjuncts, 83 conjunts are in the unsatisfiable core [2022-11-21 14:00:37,497 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-21 14:00:37,573 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2022-11-21 14:00:37,643 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-21 14:00:37,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-21 14:00:37,655 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-21 14:00:37,655 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-21 14:00:38,650 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 17 [2022-11-21 14:00:38,828 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 54 [2022-11-21 14:00:40,142 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-21 14:00:40,143 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 72 treesize of output 43 [2022-11-21 14:00:41,967 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 64 treesize of output 23 [2022-11-21 14:00:42,296 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 14:00:42,296 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-21 14:00:47,164 WARN L837 $PredicateComparison]: unable to prove that (forall ((v_ArrVal_420 (Array Int Int))) (not (= (mod (select (select (store |c_#memory_int| |c_ULTIMATE.start_main_~#id2~0#1.base| v_ArrVal_420) |c_~#arr~0.base|) (+ |c_~#arr~0.offset| (* c_~top~0 4))) 4294967296) 4294967294))) is different from false [2022-11-21 14:00:47,191 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 14:00:47,191 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-11-21 14:00:47,204 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-21 14:00:47,205 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2022-11-21 14:00:47,210 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-11-21 14:00:48,578 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 4 [2022-11-21 14:00:48,585 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-21 14:00:48,586 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-11-21 14:00:48,590 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-21 14:00:48,590 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [788361416] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-21 14:00:48,590 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-21 14:00:48,591 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 33, 33] total 96 [2022-11-21 14:00:48,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21755731] [2022-11-21 14:00:48,591 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-21 14:00:48,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2022-11-21 14:00:48,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-21 14:00:48,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2022-11-21 14:00:48,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=389, Invalid=8544, Unknown=1, NotChecked=186, Total=9120 [2022-11-21 14:00:48,601 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 174 [2022-11-21 14:00:48,606 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 859 places, 1359 transitions, 15846 flow. Second operand has 96 states, 96 states have (on average 86.32291666666667) internal successors, (8287), 96 states have internal predecessors, (8287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-21 14:00:48,606 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-21 14:00:48,607 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 174 [2022-11-21 14:00:48,607 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand