./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/triangular-longer-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8393723b Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/triangular-longer-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro --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 647bb9f2bc4e44b8324ce986a0773d034e56e6ec110a9fd5233f5c8c0dbbeb10 --- Real Ultimate output --- [0.001s][warning][os,container] Duplicate cpuset controllers detected. Picking /sys/fs/cgroup/cpuset, skipping /sys/fs/cgroup/cpuset. This is Ultimate 0.2.2-dev-8393723 [2022-11-18 20:50:55,717 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 20:50:55,719 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 20:50:55,743 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 20:50:55,750 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 20:50:55,751 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 20:50:55,754 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 20:50:55,760 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 20:50:55,767 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 20:50:55,768 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 20:50:55,769 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 20:50:55,770 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 20:50:55,770 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 20:50:55,771 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 20:50:55,774 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 20:50:55,775 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 20:50:55,778 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 20:50:55,782 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 20:50:55,784 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 20:50:55,787 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 20:50:55,797 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 20:50:55,798 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 20:50:55,799 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 20:50:55,800 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 20:50:55,803 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 20:50:55,806 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 20:50:55,807 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 20:50:55,811 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 20:50:55,812 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 20:50:55,813 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 20:50:55,813 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 20:50:55,814 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 20:50:55,816 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 20:50:55,818 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 20:50:55,820 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 20:50:55,820 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 20:50:55,822 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 20:50:55,822 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 20:50:55,822 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 20:50:55,823 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 20:50:55,824 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 20:50:55,825 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 20:50:55,856 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 20:50:55,857 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 20:50:55,858 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 20:50:55,858 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 20:50:55,859 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 20:50:55,859 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 20:50:55,860 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 20:50:55,861 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 20:50:55,861 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 20:50:55,861 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 20:50:55,862 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 20:50:55,863 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 20:50:55,863 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 20:50:55,863 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 20:50:55,863 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 20:50:55,863 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 20:50:55,864 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 20:50:55,864 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 20:50:55,864 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 20:50:55,864 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 20:50:55,865 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 20:50:55,865 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 20:50:55,865 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 20:50:55,865 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 20:50:55,865 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:50:55,866 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 20:50:55,866 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 20:50:55,866 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 20:50:55,866 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 20:50:55,867 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 20:50:55,868 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 20:50:55,869 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 20:50:55,869 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 20:50:55,869 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_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 647bb9f2bc4e44b8324ce986a0773d034e56e6ec110a9fd5233f5c8c0dbbeb10 [2022-11-18 20:50:56,185 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 20:50:56,212 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 20:50:56,216 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 20:50:56,218 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 20:50:56,219 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 20:50:56,220 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/pthread/triangular-longer-2.i [2022-11-18 20:50:56,287 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/data/6d1eb4aeb/604d7584468d4ad9a549196602edd11d/FLAGadad865d3 [2022-11-18 20:50:56,832 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 20:50:56,837 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/sv-benchmarks/c/pthread/triangular-longer-2.i [2022-11-18 20:50:56,851 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/data/6d1eb4aeb/604d7584468d4ad9a549196602edd11d/FLAGadad865d3 [2022-11-18 20:50:57,116 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/data/6d1eb4aeb/604d7584468d4ad9a549196602edd11d [2022-11-18 20:50:57,120 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 20:50:57,125 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 20:50:57,128 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 20:50:57,128 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 20:50:57,136 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 20:50:57,137 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:50:57" (1/1) ... [2022-11-18 20:50:57,139 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3c55de68 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:57, skipping insertion in model container [2022-11-18 20:50:57,140 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 08:50:57" (1/1) ... [2022-11-18 20:50:57,148 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 20:50:57,207 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 20:50:57,741 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/sv-benchmarks/c/pthread/triangular-longer-2.i[30963,30976] [2022-11-18 20:50:57,747 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:50:57,757 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 20:50:57,812 WARN L234 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/sv-benchmarks/c/pthread/triangular-longer-2.i[30963,30976] [2022-11-18 20:50:57,818 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 20:50:57,861 INFO L208 MainTranslator]: Completed translation [2022-11-18 20:50:57,862 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:57 WrapperNode [2022-11-18 20:50:57,862 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 20:50:57,863 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 20:50:57,864 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 20:50:57,864 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 20:50:57,871 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:57" (1/1) ... [2022-11-18 20:50:57,906 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:57" (1/1) ... [2022-11-18 20:50:57,930 INFO L138 Inliner]: procedures = 169, calls = 24, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 47 [2022-11-18 20:50:57,930 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 20:50:57,931 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 20:50:57,931 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 20:50:57,932 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 20:50:57,941 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:57" (1/1) ... [2022-11-18 20:50:57,942 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:57" (1/1) ... [2022-11-18 20:50:57,948 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:57" (1/1) ... [2022-11-18 20:50:57,949 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:57" (1/1) ... [2022-11-18 20:50:57,962 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:57" (1/1) ... [2022-11-18 20:50:57,971 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:57" (1/1) ... [2022-11-18 20:50:57,973 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:57" (1/1) ... [2022-11-18 20:50:57,979 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:57" (1/1) ... [2022-11-18 20:50:57,981 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 20:50:57,986 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 20:50:57,986 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 20:50:57,987 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 20:50:57,988 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:57" (1/1) ... [2022-11-18 20:50:57,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 20:50:58,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:50:58,030 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 20:50:58,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 20:50:58,077 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-18 20:50:58,077 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-18 20:50:58,078 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-18 20:50:58,078 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-18 20:50:58,078 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 20:50:58,078 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2022-11-18 20:50:58,078 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 20:50:58,079 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 20:50:58,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 20:50:58,079 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 20:50:58,079 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2022-11-18 20:50:58,079 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 20:50:58,079 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 20:50:58,081 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2022-11-18 20:50:58,304 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 20:50:58,306 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 20:50:58,523 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 20:50:58,530 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 20:50:58,530 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-18 20:50:58,533 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:50:58 BoogieIcfgContainer [2022-11-18 20:50:58,533 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 20:50:58,536 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 20:50:58,536 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 20:50:58,541 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 20:50:58,541 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 08:50:57" (1/3) ... [2022-11-18 20:50:58,542 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3428d8c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:50:58, skipping insertion in model container [2022-11-18 20:50:58,542 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 08:50:57" (2/3) ... [2022-11-18 20:50:58,543 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3428d8c3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 08:50:58, skipping insertion in model container [2022-11-18 20:50:58,543 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:50:58" (3/3) ... [2022-11-18 20:50:58,545 INFO L112 eAbstractionObserver]: Analyzing ICFG triangular-longer-2.i [2022-11-18 20:50:58,554 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-18 20:50:58,566 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 20:50:58,567 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2022-11-18 20:50:58,567 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 20:50:58,641 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2022-11-18 20:50:58,704 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 72 places, 70 transitions, 150 flow [2022-11-18 20:50:58,781 INFO L130 PetriNetUnfolder]: 5/68 cut-off events. [2022-11-18 20:50:58,781 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 20:50:58,788 INFO L83 FinitePrefix]: Finished finitePrefix Result has 75 conditions, 68 events. 5/68 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 62 event pairs, 0 based on Foata normal form. 0/62 useless extension candidates. Maximal degree in co-relation 47. Up to 2 conditions per place. [2022-11-18 20:50:58,788 INFO L82 GeneralOperation]: Start removeDead. Operand has 72 places, 70 transitions, 150 flow [2022-11-18 20:50:58,794 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 70 places, 68 transitions, 142 flow [2022-11-18 20:50:58,812 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 20:50:58,821 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;@1e16437a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 20:50:58,822 INFO L358 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2022-11-18 20:50:58,852 INFO L130 PetriNetUnfolder]: 4/57 cut-off events. [2022-11-18 20:50:58,853 INFO L131 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2022-11-18 20:50:58,853 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:50:58,854 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] [2022-11-18 20:50:58,855 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:50:58,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:50:58,861 INFO L85 PathProgramCache]: Analyzing trace with hash 398220865, now seen corresponding path program 1 times [2022-11-18 20:50:58,874 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:50:58,875 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678134247] [2022-11-18 20:50:58,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:58,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:50:59,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:50:59,675 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:50:59,677 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:50:59,677 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678134247] [2022-11-18 20:50:59,678 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678134247] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:50:59,678 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:50:59,678 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 20:50:59,680 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1007184255] [2022-11-18 20:50:59,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:50:59,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:50:59,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:50:59,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:50:59,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:50:59,727 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-11-18 20:50:59,731 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 68 transitions, 142 flow. Second operand has 6 states, 6 states have (on average 56.333333333333336) internal successors, (338), 6 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:50:59,731 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:50:59,732 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-11-18 20:50:59,733 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:50:59,924 INFO L130 PetriNetUnfolder]: 42/203 cut-off events. [2022-11-18 20:50:59,924 INFO L131 PetriNetUnfolder]: For 3/3 co-relation queries the response was YES. [2022-11-18 20:50:59,926 INFO L83 FinitePrefix]: Finished finitePrefix Result has 283 conditions, 203 events. 42/203 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 766 event pairs, 3 based on Foata normal form. 45/231 useless extension candidates. Maximal degree in co-relation 250. Up to 28 conditions per place. [2022-11-18 20:50:59,929 INFO L137 encePairwiseOnDemand]: 59/70 looper letters, 22 selfloop transitions, 17 changer transitions 0/92 dead transitions. [2022-11-18 20:50:59,929 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 92 transitions, 271 flow [2022-11-18 20:50:59,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 20:50:59,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-18 20:50:59,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 613 transitions. [2022-11-18 20:50:59,946 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8757142857142857 [2022-11-18 20:50:59,947 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 613 transitions. [2022-11-18 20:50:59,948 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 613 transitions. [2022-11-18 20:50:59,950 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:50:59,953 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 613 transitions. [2022-11-18 20:50:59,958 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 61.3) internal successors, (613), 10 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:50:59,966 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 70.0) internal successors, (770), 11 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:50:59,967 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 70.0) internal successors, (770), 11 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:50:59,969 INFO L175 Difference]: Start difference. First operand has 70 places, 68 transitions, 142 flow. Second operand 10 states and 613 transitions. [2022-11-18 20:50:59,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 92 transitions, 271 flow [2022-11-18 20:50:59,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 92 transitions, 268 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-18 20:50:59,977 INFO L231 Difference]: Finished difference. Result has 85 places, 85 transitions, 276 flow [2022-11-18 20:50:59,979 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=64, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=276, PETRI_PLACES=85, PETRI_TRANSITIONS=85} [2022-11-18 20:50:59,983 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 15 predicate places. [2022-11-18 20:50:59,983 INFO L495 AbstractCegarLoop]: Abstraction has has 85 places, 85 transitions, 276 flow [2022-11-18 20:50:59,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.333333333333336) internal successors, (338), 6 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:50:59,984 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:50:59,984 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] [2022-11-18 20:50:59,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 20:50:59,985 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:50:59,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:50:59,985 INFO L85 PathProgramCache]: Analyzing trace with hash 245149124, now seen corresponding path program 1 times [2022-11-18 20:50:59,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:50:59,986 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443658149] [2022-11-18 20:50:59,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:50:59,987 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:51:00,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:00,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:51:00,404 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:51:00,405 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443658149] [2022-11-18 20:51:00,405 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443658149] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:51:00,405 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:51:00,406 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 20:51:00,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537307707] [2022-11-18 20:51:00,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:51:00,419 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:51:00,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:51:00,426 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:51:00,426 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:51:00,427 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-11-18 20:51:00,443 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 85 places, 85 transitions, 276 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:00,445 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:51:00,445 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-11-18 20:51:00,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:51:00,616 INFO L130 PetriNetUnfolder]: 46/224 cut-off events. [2022-11-18 20:51:00,617 INFO L131 PetriNetUnfolder]: For 115/124 co-relation queries the response was YES. [2022-11-18 20:51:00,619 INFO L83 FinitePrefix]: Finished finitePrefix Result has 427 conditions, 224 events. 46/224 cut-off events. For 115/124 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 905 event pairs, 0 based on Foata normal form. 5/212 useless extension candidates. Maximal degree in co-relation 383. Up to 35 conditions per place. [2022-11-18 20:51:00,620 INFO L137 encePairwiseOnDemand]: 63/70 looper letters, 16 selfloop transitions, 9 changer transitions 40/110 dead transitions. [2022-11-18 20:51:00,620 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 110 transitions, 508 flow [2022-11-18 20:51:00,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 20:51:00,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-18 20:51:00,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 475 transitions. [2022-11-18 20:51:00,623 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8482142857142857 [2022-11-18 20:51:00,624 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 475 transitions. [2022-11-18 20:51:00,624 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 475 transitions. [2022-11-18 20:51:00,625 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:51:00,625 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 475 transitions. [2022-11-18 20:51:00,627 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 59.375) internal successors, (475), 8 states have internal predecessors, (475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:00,633 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:00,637 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 70.0) internal successors, (630), 9 states have internal predecessors, (630), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:00,638 INFO L175 Difference]: Start difference. First operand has 85 places, 85 transitions, 276 flow. Second operand 8 states and 475 transitions. [2022-11-18 20:51:00,638 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 110 transitions, 508 flow [2022-11-18 20:51:00,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 110 transitions, 508 flow, removed 0 selfloop flow, removed 0 redundant places. [2022-11-18 20:51:00,646 INFO L231 Difference]: Finished difference. Result has 96 places, 67 transitions, 237 flow [2022-11-18 20:51:00,648 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=237, PETRI_PLACES=96, PETRI_TRANSITIONS=67} [2022-11-18 20:51:00,649 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 26 predicate places. [2022-11-18 20:51:00,649 INFO L495 AbstractCegarLoop]: Abstraction has has 96 places, 67 transitions, 237 flow [2022-11-18 20:51:00,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:00,650 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:51:00,650 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] [2022-11-18 20:51:00,651 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 20:51:00,651 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:51:00,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:51:00,652 INFO L85 PathProgramCache]: Analyzing trace with hash 1444168350, now seen corresponding path program 1 times [2022-11-18 20:51:00,652 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:51:00,652 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785461590] [2022-11-18 20:51:00,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:51:00,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:51:00,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:00,839 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:51:00,839 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:51:00,840 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785461590] [2022-11-18 20:51:00,840 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785461590] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:51:00,840 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:51:00,840 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 20:51:00,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087473824] [2022-11-18 20:51:00,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:51:00,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:51:00,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:51:00,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:51:00,843 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:51:00,844 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-11-18 20:51:00,844 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 67 transitions, 237 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:00,845 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:51:00,845 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-11-18 20:51:00,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:51:00,957 INFO L130 PetriNetUnfolder]: 37/196 cut-off events. [2022-11-18 20:51:00,957 INFO L131 PetriNetUnfolder]: For 265/276 co-relation queries the response was YES. [2022-11-18 20:51:00,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 412 conditions, 196 events. 37/196 cut-off events. For 265/276 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 647 event pairs, 0 based on Foata normal form. 12/190 useless extension candidates. Maximal degree in co-relation 362. Up to 35 conditions per place. [2022-11-18 20:51:00,960 INFO L137 encePairwiseOnDemand]: 64/70 looper letters, 23 selfloop transitions, 11 changer transitions 8/87 dead transitions. [2022-11-18 20:51:00,961 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 87 transitions, 457 flow [2022-11-18 20:51:00,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2022-11-18 20:51:00,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2022-11-18 20:51:00,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 530 transitions. [2022-11-18 20:51:00,963 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8412698412698413 [2022-11-18 20:51:00,963 INFO L72 ComplementDD]: Start complementDD. Operand 9 states and 530 transitions. [2022-11-18 20:51:00,964 INFO L73 IsDeterministic]: Start isDeterministic. Operand 9 states and 530 transitions. [2022-11-18 20:51:00,964 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:51:00,964 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 9 states and 530 transitions. [2022-11-18 20:51:00,966 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 10 states, 9 states have (on average 58.888888888888886) internal successors, (530), 9 states have internal predecessors, (530), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:00,969 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:00,970 INFO L81 ComplementDD]: Finished complementDD. Result has 10 states, 10 states have (on average 70.0) internal successors, (700), 10 states have internal predecessors, (700), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:00,970 INFO L175 Difference]: Start difference. First operand has 96 places, 67 transitions, 237 flow. Second operand 9 states and 530 transitions. [2022-11-18 20:51:00,970 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 87 transitions, 457 flow [2022-11-18 20:51:00,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 87 transitions, 387 flow, removed 25 selfloop flow, removed 9 redundant places. [2022-11-18 20:51:00,975 INFO L231 Difference]: Finished difference. Result has 86 places, 72 transitions, 289 flow [2022-11-18 20:51:00,976 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=289, PETRI_PLACES=86, PETRI_TRANSITIONS=72} [2022-11-18 20:51:00,976 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 16 predicate places. [2022-11-18 20:51:00,977 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 72 transitions, 289 flow [2022-11-18 20:51:00,977 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:00,977 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:51:00,978 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] [2022-11-18 20:51:00,978 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 20:51:00,978 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:51:00,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:51:00,979 INFO L85 PathProgramCache]: Analyzing trace with hash -1245653052, now seen corresponding path program 2 times [2022-11-18 20:51:00,979 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:51:00,979 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126908647] [2022-11-18 20:51:00,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:51:00,980 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:51:00,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:01,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:51:01,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:51:01,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126908647] [2022-11-18 20:51:01,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126908647] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:51:01,174 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:51:01,174 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2022-11-18 20:51:01,174 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4176897] [2022-11-18 20:51:01,174 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:51:01,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 20:51:01,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:51:01,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 20:51:01,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2022-11-18 20:51:01,181 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-11-18 20:51:01,182 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 72 transitions, 289 flow. Second operand has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:01,182 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:51:01,182 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-11-18 20:51:01,182 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:51:01,351 INFO L130 PetriNetUnfolder]: 34/199 cut-off events. [2022-11-18 20:51:01,351 INFO L131 PetriNetUnfolder]: For 304/340 co-relation queries the response was YES. [2022-11-18 20:51:01,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 444 conditions, 199 events. 34/199 cut-off events. For 304/340 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 700 event pairs, 0 based on Foata normal form. 25/206 useless extension candidates. Maximal degree in co-relation 412. Up to 37 conditions per place. [2022-11-18 20:51:01,356 INFO L137 encePairwiseOnDemand]: 64/70 looper letters, 21 selfloop transitions, 15 changer transitions 11/92 dead transitions. [2022-11-18 20:51:01,356 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 92 transitions, 536 flow [2022-11-18 20:51:01,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2022-11-18 20:51:01,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2022-11-18 20:51:01,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 585 transitions. [2022-11-18 20:51:01,359 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8357142857142857 [2022-11-18 20:51:01,359 INFO L72 ComplementDD]: Start complementDD. Operand 10 states and 585 transitions. [2022-11-18 20:51:01,359 INFO L73 IsDeterministic]: Start isDeterministic. Operand 10 states and 585 transitions. [2022-11-18 20:51:01,360 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:51:01,360 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 10 states and 585 transitions. [2022-11-18 20:51:01,363 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 11 states, 10 states have (on average 58.5) internal successors, (585), 10 states have internal predecessors, (585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:01,366 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 11 states, 11 states have (on average 70.0) internal successors, (770), 11 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:01,369 INFO L81 ComplementDD]: Finished complementDD. Result has 11 states, 11 states have (on average 70.0) internal successors, (770), 11 states have internal predecessors, (770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:01,370 INFO L175 Difference]: Start difference. First operand has 86 places, 72 transitions, 289 flow. Second operand 10 states and 585 transitions. [2022-11-18 20:51:01,370 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 92 transitions, 536 flow [2022-11-18 20:51:01,375 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 92 transitions, 511 flow, removed 8 selfloop flow, removed 3 redundant places. [2022-11-18 20:51:01,378 INFO L231 Difference]: Finished difference. Result has 95 places, 77 transitions, 370 flow [2022-11-18 20:51:01,379 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=273, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=370, PETRI_PLACES=95, PETRI_TRANSITIONS=77} [2022-11-18 20:51:01,381 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 25 predicate places. [2022-11-18 20:51:01,381 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 77 transitions, 370 flow [2022-11-18 20:51:01,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 56.5) internal successors, (339), 6 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:01,387 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:51:01,387 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] [2022-11-18 20:51:01,388 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2022-11-18 20:51:01,388 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:51:01,389 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:51:01,389 INFO L85 PathProgramCache]: Analyzing trace with hash 1461818299, now seen corresponding path program 1 times [2022-11-18 20:51:01,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:51:01,391 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948505546] [2022-11-18 20:51:01,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:51:01,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:51:01,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:01,614 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:51:01,614 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:51:01,614 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948505546] [2022-11-18 20:51:01,615 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948505546] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:51:01,615 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:51:01,615 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 20:51:01,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442616043] [2022-11-18 20:51:01,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:51:01,616 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:51:01,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:51:01,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:51:01,617 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:51:01,617 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-11-18 20:51:01,618 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 77 transitions, 370 flow. Second operand has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:01,618 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:51:01,618 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-11-18 20:51:01,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:51:01,772 INFO L130 PetriNetUnfolder]: 47/248 cut-off events. [2022-11-18 20:51:01,772 INFO L131 PetriNetUnfolder]: For 546/567 co-relation queries the response was YES. [2022-11-18 20:51:01,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 615 conditions, 248 events. 47/248 cut-off events. For 546/567 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 952 event pairs, 1 based on Foata normal form. 19/243 useless extension candidates. Maximal degree in co-relation 561. Up to 55 conditions per place. [2022-11-18 20:51:01,776 INFO L137 encePairwiseOnDemand]: 63/70 looper letters, 25 selfloop transitions, 23 changer transitions 8/101 dead transitions. [2022-11-18 20:51:01,776 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 101 transitions, 694 flow [2022-11-18 20:51:01,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 20:51:01,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-18 20:51:01,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 644 transitions. [2022-11-18 20:51:01,779 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8363636363636363 [2022-11-18 20:51:01,779 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 644 transitions. [2022-11-18 20:51:01,779 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 644 transitions. [2022-11-18 20:51:01,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:51:01,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 644 transitions. [2022-11-18 20:51:01,781 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 58.54545454545455) internal successors, (644), 11 states have internal predecessors, (644), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:01,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:01,784 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:01,784 INFO L175 Difference]: Start difference. First operand has 95 places, 77 transitions, 370 flow. Second operand 11 states and 644 transitions. [2022-11-18 20:51:01,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 101 transitions, 694 flow [2022-11-18 20:51:01,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 101 transitions, 647 flow, removed 19 selfloop flow, removed 5 redundant places. [2022-11-18 20:51:01,791 INFO L231 Difference]: Finished difference. Result has 104 places, 83 transitions, 485 flow [2022-11-18 20:51:01,792 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=485, PETRI_PLACES=104, PETRI_TRANSITIONS=83} [2022-11-18 20:51:01,794 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 34 predicate places. [2022-11-18 20:51:01,794 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 83 transitions, 485 flow [2022-11-18 20:51:01,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:01,795 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:51:01,796 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] [2022-11-18 20:51:01,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 20:51:01,796 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:51:01,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:51:01,797 INFO L85 PathProgramCache]: Analyzing trace with hash -1283973881, now seen corresponding path program 2 times [2022-11-18 20:51:01,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:51:01,798 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172944499] [2022-11-18 20:51:01,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:51:01,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:51:01,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:01,998 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:51:01,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:51:01,999 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172944499] [2022-11-18 20:51:01,999 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172944499] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 20:51:01,999 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 20:51:01,999 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2022-11-18 20:51:01,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [950084059] [2022-11-18 20:51:02,000 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 20:51:02,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2022-11-18 20:51:02,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:51:02,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2022-11-18 20:51:02,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2022-11-18 20:51:02,003 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-11-18 20:51:02,003 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 83 transitions, 485 flow. Second operand has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:02,004 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:51:02,004 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-11-18 20:51:02,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:51:02,203 INFO L130 PetriNetUnfolder]: 41/239 cut-off events. [2022-11-18 20:51:02,204 INFO L131 PetriNetUnfolder]: For 949/978 co-relation queries the response was YES. [2022-11-18 20:51:02,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 709 conditions, 239 events. 41/239 cut-off events. For 949/978 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 938 event pairs, 1 based on Foata normal form. 24/240 useless extension candidates. Maximal degree in co-relation 660. Up to 51 conditions per place. [2022-11-18 20:51:02,208 INFO L137 encePairwiseOnDemand]: 63/70 looper letters, 23 selfloop transitions, 23 changer transitions 11/102 dead transitions. [2022-11-18 20:51:02,209 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 102 transitions, 868 flow [2022-11-18 20:51:02,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2022-11-18 20:51:02,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2022-11-18 20:51:02,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 638 transitions. [2022-11-18 20:51:02,212 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8285714285714286 [2022-11-18 20:51:02,212 INFO L72 ComplementDD]: Start complementDD. Operand 11 states and 638 transitions. [2022-11-18 20:51:02,212 INFO L73 IsDeterministic]: Start isDeterministic. Operand 11 states and 638 transitions. [2022-11-18 20:51:02,213 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:51:02,213 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 11 states and 638 transitions. [2022-11-18 20:51:02,215 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 12 states, 11 states have (on average 58.0) internal successors, (638), 11 states have internal predecessors, (638), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:02,218 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:02,220 INFO L81 ComplementDD]: Finished complementDD. Result has 12 states, 12 states have (on average 70.0) internal successors, (840), 12 states have internal predecessors, (840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:02,221 INFO L175 Difference]: Start difference. First operand has 104 places, 83 transitions, 485 flow. Second operand 11 states and 638 transitions. [2022-11-18 20:51:02,221 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 102 transitions, 868 flow [2022-11-18 20:51:02,229 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 102 transitions, 805 flow, removed 22 selfloop flow, removed 5 redundant places. [2022-11-18 20:51:02,234 INFO L231 Difference]: Finished difference. Result has 111 places, 85 transitions, 555 flow [2022-11-18 20:51:02,235 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=448, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=555, PETRI_PLACES=111, PETRI_TRANSITIONS=85} [2022-11-18 20:51:02,238 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 41 predicate places. [2022-11-18 20:51:02,238 INFO L495 AbstractCegarLoop]: Abstraction has has 111 places, 85 transitions, 555 flow [2022-11-18 20:51:02,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 56.42857142857143) internal successors, (395), 7 states have internal predecessors, (395), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:02,240 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:51:02,241 INFO L209 CegarLoopForPetriNet]: trace histogram [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] [2022-11-18 20:51:02,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-18 20:51:02,241 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:51:02,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:51:02,242 INFO L85 PathProgramCache]: Analyzing trace with hash -495311077, now seen corresponding path program 1 times [2022-11-18 20:51:02,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:51:02,242 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437309530] [2022-11-18 20:51:02,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:51:02,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:51:02,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:02,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:51:02,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:51:02,452 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437309530] [2022-11-18 20:51:02,455 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437309530] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:51:02,459 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945966233] [2022-11-18 20:51:02,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:51:02,460 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:51:02,460 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:51:02,464 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:51:02,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 20:51:02,568 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:02,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 9 conjunts are in the unsatisfiable core [2022-11-18 20:51:02,577 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:51:02,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:51:02,797 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:51:02,975 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:51:02,975 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [945966233] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:51:02,975 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:51:02,976 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 14 [2022-11-18 20:51:02,976 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929725300] [2022-11-18 20:51:02,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:51:02,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2022-11-18 20:51:02,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:51:02,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2022-11-18 20:51:02,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2022-11-18 20:51:02,981 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-11-18 20:51:02,982 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 85 transitions, 555 flow. Second operand has 14 states, 14 states have (on average 56.57142857142857) internal successors, (792), 14 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:02,982 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:51:02,982 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-11-18 20:51:02,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:51:03,424 INFO L130 PetriNetUnfolder]: 55/317 cut-off events. [2022-11-18 20:51:03,425 INFO L131 PetriNetUnfolder]: For 1631/1674 co-relation queries the response was YES. [2022-11-18 20:51:03,427 INFO L83 FinitePrefix]: Finished finitePrefix Result has 996 conditions, 317 events. 55/317 cut-off events. For 1631/1674 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1285 event pairs, 1 based on Foata normal form. 25/311 useless extension candidates. Maximal degree in co-relation 943. Up to 67 conditions per place. [2022-11-18 20:51:03,430 INFO L137 encePairwiseOnDemand]: 63/70 looper letters, 27 selfloop transitions, 38 changer transitions 14/124 dead transitions. [2022-11-18 20:51:03,431 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 124 transitions, 1327 flow [2022-11-18 20:51:03,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2022-11-18 20:51:03,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2022-11-18 20:51:03,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 1159 transitions. [2022-11-18 20:51:03,435 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8278571428571428 [2022-11-18 20:51:03,435 INFO L72 ComplementDD]: Start complementDD. Operand 20 states and 1159 transitions. [2022-11-18 20:51:03,435 INFO L73 IsDeterministic]: Start isDeterministic. Operand 20 states and 1159 transitions. [2022-11-18 20:51:03,436 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:51:03,436 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 20 states and 1159 transitions. [2022-11-18 20:51:03,439 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 21 states, 20 states have (on average 57.95) internal successors, (1159), 20 states have internal predecessors, (1159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:03,443 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 21 states, 21 states have (on average 70.0) internal successors, (1470), 21 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:03,443 INFO L81 ComplementDD]: Finished complementDD. Result has 21 states, 21 states have (on average 70.0) internal successors, (1470), 21 states have internal predecessors, (1470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:03,444 INFO L175 Difference]: Start difference. First operand has 111 places, 85 transitions, 555 flow. Second operand 20 states and 1159 transitions. [2022-11-18 20:51:03,444 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 124 transitions, 1327 flow [2022-11-18 20:51:03,453 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 124 transitions, 1190 flow, removed 48 selfloop flow, removed 10 redundant places. [2022-11-18 20:51:03,456 INFO L231 Difference]: Finished difference. Result has 127 places, 101 transitions, 862 flow [2022-11-18 20:51:03,456 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=494, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=862, PETRI_PLACES=127, PETRI_TRANSITIONS=101} [2022-11-18 20:51:03,457 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 57 predicate places. [2022-11-18 20:51:03,457 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 101 transitions, 862 flow [2022-11-18 20:51:03,458 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 56.57142857142857) internal successors, (792), 14 states have internal predecessors, (792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:03,458 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:51:03,458 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 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] [2022-11-18 20:51:03,469 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 20:51:03,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2022-11-18 20:51:03,664 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:51:03,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:51:03,664 INFO L85 PathProgramCache]: Analyzing trace with hash -2022110288, now seen corresponding path program 1 times [2022-11-18 20:51:03,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:51:03,664 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253484289] [2022-11-18 20:51:03,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:51:03,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:51:03,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:03,993 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:51:03,993 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:51:03,993 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253484289] [2022-11-18 20:51:03,993 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253484289] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:51:03,994 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [97632909] [2022-11-18 20:51:03,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:51:03,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:51:03,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:51:03,999 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:51:04,022 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 20:51:04,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:04,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-18 20:51:04,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:51:04,283 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:51:04,283 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:51:04,613 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:51:04,614 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [97632909] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:51:04,614 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:51:04,614 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 17 [2022-11-18 20:51:04,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [266437051] [2022-11-18 20:51:04,615 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:51:04,615 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2022-11-18 20:51:04,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:51:04,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2022-11-18 20:51:04,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2022-11-18 20:51:04,618 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-11-18 20:51:04,619 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 101 transitions, 862 flow. Second operand has 17 states, 17 states have (on average 56.588235294117645) internal successors, (962), 17 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:04,619 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:51:04,619 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-11-18 20:51:04,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:51:05,135 INFO L130 PetriNetUnfolder]: 77/470 cut-off events. [2022-11-18 20:51:05,135 INFO L131 PetriNetUnfolder]: For 3490/3539 co-relation queries the response was YES. [2022-11-18 20:51:05,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1622 conditions, 470 events. 77/470 cut-off events. For 3490/3539 co-relation queries the response was YES. Maximal size of possible extension queue 17. Compared 1967 event pairs, 0 based on Foata normal form. 26/448 useless extension candidates. Maximal degree in co-relation 1559. Up to 103 conditions per place. [2022-11-18 20:51:05,141 INFO L137 encePairwiseOnDemand]: 64/70 looper letters, 58 selfloop transitions, 27 changer transitions 26/156 dead transitions. [2022-11-18 20:51:05,142 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 156 transitions, 2114 flow [2022-11-18 20:51:05,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2022-11-18 20:51:05,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 25 states. [2022-11-18 20:51:05,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 1450 transitions. [2022-11-18 20:51:05,146 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8285714285714286 [2022-11-18 20:51:05,147 INFO L72 ComplementDD]: Start complementDD. Operand 25 states and 1450 transitions. [2022-11-18 20:51:05,147 INFO L73 IsDeterministic]: Start isDeterministic. Operand 25 states and 1450 transitions. [2022-11-18 20:51:05,148 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:51:05,148 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 25 states and 1450 transitions. [2022-11-18 20:51:05,152 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 26 states, 25 states have (on average 58.0) internal successors, (1450), 25 states have internal predecessors, (1450), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:05,156 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 26 states, 26 states have (on average 70.0) internal successors, (1820), 26 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:05,157 INFO L81 ComplementDD]: Finished complementDD. Result has 26 states, 26 states have (on average 70.0) internal successors, (1820), 26 states have internal predecessors, (1820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:05,157 INFO L175 Difference]: Start difference. First operand has 127 places, 101 transitions, 862 flow. Second operand 25 states and 1450 transitions. [2022-11-18 20:51:05,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 156 transitions, 2114 flow [2022-11-18 20:51:05,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 156 transitions, 1699 flow, removed 190 selfloop flow, removed 12 redundant places. [2022-11-18 20:51:05,174 INFO L231 Difference]: Finished difference. Result has 153 places, 115 transitions, 992 flow [2022-11-18 20:51:05,174 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=659, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=25, PETRI_FLOW=992, PETRI_PLACES=153, PETRI_TRANSITIONS=115} [2022-11-18 20:51:05,175 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 83 predicate places. [2022-11-18 20:51:05,175 INFO L495 AbstractCegarLoop]: Abstraction has has 153 places, 115 transitions, 992 flow [2022-11-18 20:51:05,175 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 56.588235294117645) internal successors, (962), 17 states have internal predecessors, (962), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:05,176 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:51:05,176 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 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] [2022-11-18 20:51:05,187 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 20:51:05,381 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2022-11-18 20:51:05,382 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:51:05,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:51:05,382 INFO L85 PathProgramCache]: Analyzing trace with hash 1596067542, now seen corresponding path program 2 times [2022-11-18 20:51:05,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:51:05,383 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [239430865] [2022-11-18 20:51:05,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:51:05,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:51:05,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:05,616 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:51:05,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:51:05,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [239430865] [2022-11-18 20:51:05,617 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [239430865] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:51:05,617 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [732740536] [2022-11-18 20:51:05,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:51:05,617 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:51:05,617 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:51:05,619 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:51:05,626 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 20:51:05,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:51:05,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:51:05,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-18 20:51:05,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:51:05,877 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:51:05,877 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:51:06,197 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:51:06,197 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [732740536] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:51:06,197 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:51:06,198 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-11-18 20:51:06,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624405195] [2022-11-18 20:51:06,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:51:06,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 20:51:06,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:51:06,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 20:51:06,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:51:06,201 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-11-18 20:51:06,202 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 115 transitions, 992 flow. Second operand has 18 states, 18 states have (on average 56.611111111111114) internal successors, (1019), 18 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:06,202 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:51:06,202 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-11-18 20:51:06,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:51:06,978 INFO L130 PetriNetUnfolder]: 115/731 cut-off events. [2022-11-18 20:51:06,978 INFO L131 PetriNetUnfolder]: For 12523/12668 co-relation queries the response was YES. [2022-11-18 20:51:06,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2997 conditions, 731 events. 115/731 cut-off events. For 12523/12668 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 4303 event pairs, 0 based on Foata normal form. 28/685 useless extension candidates. Maximal degree in co-relation 2917. Up to 151 conditions per place. [2022-11-18 20:51:06,990 INFO L137 encePairwiseOnDemand]: 63/70 looper letters, 59 selfloop transitions, 74 changer transitions 26/204 dead transitions. [2022-11-18 20:51:06,990 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 204 transitions, 3336 flow [2022-11-18 20:51:06,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2022-11-18 20:51:06,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2022-11-18 20:51:06,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 1851 transitions. [2022-11-18 20:51:06,996 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8263392857142857 [2022-11-18 20:51:06,996 INFO L72 ComplementDD]: Start complementDD. Operand 32 states and 1851 transitions. [2022-11-18 20:51:06,996 INFO L73 IsDeterministic]: Start isDeterministic. Operand 32 states and 1851 transitions. [2022-11-18 20:51:06,998 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:51:06,998 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 32 states and 1851 transitions. [2022-11-18 20:51:07,006 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 33 states, 32 states have (on average 57.84375) internal successors, (1851), 32 states have internal predecessors, (1851), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:07,011 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 33 states, 33 states have (on average 70.0) internal successors, (2310), 33 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:07,012 INFO L81 ComplementDD]: Finished complementDD. Result has 33 states, 33 states have (on average 70.0) internal successors, (2310), 33 states have internal predecessors, (2310), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:07,012 INFO L175 Difference]: Start difference. First operand has 153 places, 115 transitions, 992 flow. Second operand 32 states and 1851 transitions. [2022-11-18 20:51:07,012 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 204 transitions, 3336 flow [2022-11-18 20:51:07,047 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 204 transitions, 2811 flow, removed 253 selfloop flow, removed 13 redundant places. [2022-11-18 20:51:07,053 INFO L231 Difference]: Finished difference. Result has 185 places, 153 transitions, 1757 flow [2022-11-18 20:51:07,053 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=855, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=1757, PETRI_PLACES=185, PETRI_TRANSITIONS=153} [2022-11-18 20:51:07,054 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 115 predicate places. [2022-11-18 20:51:07,054 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 153 transitions, 1757 flow [2022-11-18 20:51:07,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 56.611111111111114) internal successors, (1019), 18 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:07,055 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:51:07,056 INFO L209 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 3, 3, 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] [2022-11-18 20:51:07,066 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 20:51:07,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:51:07,261 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:51:07,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:51:07,262 INFO L85 PathProgramCache]: Analyzing trace with hash -1423924408, now seen corresponding path program 3 times [2022-11-18 20:51:07,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:51:07,263 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2120357898] [2022-11-18 20:51:07,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:51:07,263 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:51:07,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:07,461 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:51:07,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:51:07,461 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2120357898] [2022-11-18 20:51:07,462 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2120357898] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:51:07,462 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861155134] [2022-11-18 20:51:07,462 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:51:07,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:51:07,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:51:07,463 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:51:07,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 20:51:07,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2022-11-18 20:51:07,569 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:51:07,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 152 conjuncts, 11 conjunts are in the unsatisfiable core [2022-11-18 20:51:07,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:51:07,667 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:51:07,667 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:51:07,846 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:51:07,846 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861155134] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:51:07,846 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:51:07,846 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 18 [2022-11-18 20:51:07,847 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867103309] [2022-11-18 20:51:07,847 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:51:07,847 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2022-11-18 20:51:07,847 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:51:07,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2022-11-18 20:51:07,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=238, Unknown=0, NotChecked=0, Total=306 [2022-11-18 20:51:07,850 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-11-18 20:51:07,851 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 153 transitions, 1757 flow. Second operand has 18 states, 18 states have (on average 56.611111111111114) internal successors, (1019), 18 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:07,851 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:51:07,851 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-11-18 20:51:07,851 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:51:08,906 INFO L130 PetriNetUnfolder]: 156/1010 cut-off events. [2022-11-18 20:51:08,906 INFO L131 PetriNetUnfolder]: For 31065/31191 co-relation queries the response was YES. [2022-11-18 20:51:08,918 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4920 conditions, 1010 events. 156/1010 cut-off events. For 31065/31191 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 6771 event pairs, 0 based on Foata normal form. 37/945 useless extension candidates. Maximal degree in co-relation 4824. Up to 201 conditions per place. [2022-11-18 20:51:08,928 INFO L137 encePairwiseOnDemand]: 63/70 looper letters, 49 selfloop transitions, 130 changer transitions 26/250 dead transitions. [2022-11-18 20:51:08,929 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 250 transitions, 5261 flow [2022-11-18 20:51:08,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-18 20:51:08,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-11-18 20:51:08,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 2143 transitions. [2022-11-18 20:51:08,933 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8274131274131274 [2022-11-18 20:51:08,934 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 2143 transitions. [2022-11-18 20:51:08,934 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 2143 transitions. [2022-11-18 20:51:08,935 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:51:08,935 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 2143 transitions. [2022-11-18 20:51:08,940 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 57.91891891891892) internal successors, (2143), 37 states have internal predecessors, (2143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:08,945 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 70.0) internal successors, (2660), 38 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:08,947 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 70.0) internal successors, (2660), 38 states have internal predecessors, (2660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:08,947 INFO L175 Difference]: Start difference. First operand has 185 places, 153 transitions, 1757 flow. Second operand 37 states and 2143 transitions. [2022-11-18 20:51:08,947 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 250 transitions, 5261 flow [2022-11-18 20:51:09,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 197 places, 250 transitions, 4482 flow, removed 379 selfloop flow, removed 15 redundant places. [2022-11-18 20:51:09,033 INFO L231 Difference]: Finished difference. Result has 221 places, 195 transitions, 2799 flow [2022-11-18 20:51:09,034 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=1482, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=2799, PETRI_PLACES=221, PETRI_TRANSITIONS=195} [2022-11-18 20:51:09,035 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 151 predicate places. [2022-11-18 20:51:09,035 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 195 transitions, 2799 flow [2022-11-18 20:51:09,036 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 56.611111111111114) internal successors, (1019), 18 states have internal predecessors, (1019), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:09,036 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:51:09,036 INFO L209 CegarLoopForPetriNet]: trace histogram [5, 5, 4, 4, 4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:51:09,047 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 20:51:09,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:51:09,242 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:51:09,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:51:09,243 INFO L85 PathProgramCache]: Analyzing trace with hash 1976790522, now seen corresponding path program 4 times [2022-11-18 20:51:09,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:51:09,243 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834697391] [2022-11-18 20:51:09,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:51:09,243 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:51:09,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:09,574 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:51:09,575 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:51:09,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834697391] [2022-11-18 20:51:09,575 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834697391] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:51:09,575 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816992415] [2022-11-18 20:51:09,575 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:51:09,576 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:51:09,576 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:51:09,577 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:51:09,588 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 20:51:09,676 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:51:09,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:51:09,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 15 conjunts are in the unsatisfiable core [2022-11-18 20:51:09,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:51:09,829 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:51:09,829 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:51:10,114 INFO L134 CoverageAnalysis]: Checked inductivity of 59 backedges. 0 proven. 59 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:51:10,116 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [816992415] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:51:10,117 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:51:10,117 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 26 [2022-11-18 20:51:10,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1553262876] [2022-11-18 20:51:10,119 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:51:10,120 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2022-11-18 20:51:10,120 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:51:10,121 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2022-11-18 20:51:10,121 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=148, Invalid=502, Unknown=0, NotChecked=0, Total=650 [2022-11-18 20:51:10,123 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-11-18 20:51:10,125 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 195 transitions, 2799 flow. Second operand has 26 states, 26 states have (on average 56.30769230769231) internal successors, (1464), 26 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:10,125 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:51:10,126 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-11-18 20:51:10,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:51:11,901 INFO L130 PetriNetUnfolder]: 218/1424 cut-off events. [2022-11-18 20:51:11,901 INFO L131 PetriNetUnfolder]: For 75946/76118 co-relation queries the response was YES. [2022-11-18 20:51:11,927 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8516 conditions, 1424 events. 218/1424 cut-off events. For 75946/76118 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 9433 event pairs, 1 based on Foata normal form. 41/1317 useless extension candidates. Maximal degree in co-relation 8406. Up to 281 conditions per place. [2022-11-18 20:51:11,943 INFO L137 encePairwiseOnDemand]: 63/70 looper letters, 62 selfloop transitions, 185 changer transitions 32/324 dead transitions. [2022-11-18 20:51:11,943 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 261 places, 324 transitions, 9330 flow [2022-11-18 20:51:11,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-18 20:51:11,944 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-11-18 20:51:11,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 2893 transitions. [2022-11-18 20:51:11,949 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8265714285714286 [2022-11-18 20:51:11,949 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 2893 transitions. [2022-11-18 20:51:11,950 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 2893 transitions. [2022-11-18 20:51:11,951 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:51:11,951 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 2893 transitions. [2022-11-18 20:51:11,957 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 57.86) internal successors, (2893), 50 states have internal predecessors, (2893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:11,965 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 70.0) internal successors, (3570), 51 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:11,966 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 70.0) internal successors, (3570), 51 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:11,967 INFO L175 Difference]: Start difference. First operand has 221 places, 195 transitions, 2799 flow. Second operand 50 states and 2893 transitions. [2022-11-18 20:51:11,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 261 places, 324 transitions, 9330 flow [2022-11-18 20:51:12,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 241 places, 324 transitions, 6859 flow, removed 1209 selfloop flow, removed 20 redundant places. [2022-11-18 20:51:12,160 INFO L231 Difference]: Finished difference. Result has 272 places, 256 transitions, 4116 flow [2022-11-18 20:51:12,161 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=2218, PETRI_DIFFERENCE_MINUEND_PLACES=192, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=4116, PETRI_PLACES=272, PETRI_TRANSITIONS=256} [2022-11-18 20:51:12,162 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 202 predicate places. [2022-11-18 20:51:12,162 INFO L495 AbstractCegarLoop]: Abstraction has has 272 places, 256 transitions, 4116 flow [2022-11-18 20:51:12,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 56.30769230769231) internal successors, (1464), 26 states have internal predecessors, (1464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:12,163 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:51:12,163 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:51:12,174 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2022-11-18 20:51:12,368 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:51:12,369 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:51:12,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:51:12,369 INFO L85 PathProgramCache]: Analyzing trace with hash -1180345628, now seen corresponding path program 5 times [2022-11-18 20:51:12,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:51:12,370 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902247192] [2022-11-18 20:51:12,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:51:12,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:51:12,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:13,167 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:51:13,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:51:13,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902247192] [2022-11-18 20:51:13,168 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902247192] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:51:13,168 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [67184073] [2022-11-18 20:51:13,169 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:51:13,169 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:51:13,169 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:51:13,170 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:51:13,184 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 20:51:13,301 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-11-18 20:51:13,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:51:13,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 20:51:13,307 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:51:13,720 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:51:13,720 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:51:14,675 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:51:14,676 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [67184073] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:51:14,676 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:51:14,676 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 41 [2022-11-18 20:51:14,677 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793390957] [2022-11-18 20:51:14,677 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:51:14,678 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-18 20:51:14,678 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:51:14,679 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-18 20:51:14,680 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=391, Invalid=1249, Unknown=0, NotChecked=0, Total=1640 [2022-11-18 20:51:14,683 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-11-18 20:51:14,686 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 272 places, 256 transitions, 4116 flow. Second operand has 41 states, 41 states have (on average 56.24390243902439) internal successors, (2306), 41 states have internal predecessors, (2306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:14,686 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:51:14,686 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-11-18 20:51:14,686 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:51:15,932 INFO L130 PetriNetUnfolder]: 226/1529 cut-off events. [2022-11-18 20:51:15,932 INFO L131 PetriNetUnfolder]: For 101248/101420 co-relation queries the response was YES. [2022-11-18 20:51:15,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9573 conditions, 1529 events. 226/1529 cut-off events. For 101248/101420 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 9813 event pairs, 0 based on Foata normal form. 24/1388 useless extension candidates. Maximal degree in co-relation 9442. Up to 305 conditions per place. [2022-11-18 20:51:15,968 INFO L137 encePairwiseOnDemand]: 64/70 looper letters, 206 selfloop transitions, 47 changer transitions 20/318 dead transitions. [2022-11-18 20:51:15,968 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 293 places, 318 transitions, 8460 flow [2022-11-18 20:51:15,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2022-11-18 20:51:15,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2022-11-18 20:51:15,976 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 1902 transitions. [2022-11-18 20:51:15,981 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8233766233766234 [2022-11-18 20:51:15,981 INFO L72 ComplementDD]: Start complementDD. Operand 33 states and 1902 transitions. [2022-11-18 20:51:15,982 INFO L73 IsDeterministic]: Start isDeterministic. Operand 33 states and 1902 transitions. [2022-11-18 20:51:15,984 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:51:15,984 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 33 states and 1902 transitions. [2022-11-18 20:51:15,992 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 34 states, 33 states have (on average 57.63636363636363) internal successors, (1902), 33 states have internal predecessors, (1902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:16,006 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 34 states, 34 states have (on average 70.0) internal successors, (2380), 34 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:16,016 INFO L81 ComplementDD]: Finished complementDD. Result has 34 states, 34 states have (on average 70.0) internal successors, (2380), 34 states have internal predecessors, (2380), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:16,016 INFO L175 Difference]: Start difference. First operand has 272 places, 256 transitions, 4116 flow. Second operand 33 states and 1902 transitions. [2022-11-18 20:51:16,016 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 293 places, 318 transitions, 8460 flow [2022-11-18 20:51:16,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 275 places, 318 transitions, 6778 flow, removed 814 selfloop flow, removed 18 redundant places. [2022-11-18 20:51:16,312 INFO L231 Difference]: Finished difference. Result has 290 places, 272 transitions, 3941 flow [2022-11-18 20:51:16,312 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=3300, PETRI_DIFFERENCE_MINUEND_PLACES=243, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=256, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=217, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=3941, PETRI_PLACES=290, PETRI_TRANSITIONS=272} [2022-11-18 20:51:16,314 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 220 predicate places. [2022-11-18 20:51:16,314 INFO L495 AbstractCegarLoop]: Abstraction has has 290 places, 272 transitions, 3941 flow [2022-11-18 20:51:16,315 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 56.24390243902439) internal successors, (2306), 41 states have internal predecessors, (2306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:16,315 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:51:16,315 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:51:16,324 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2022-11-18 20:51:16,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:51:16,522 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:51:16,522 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:51:16,522 INFO L85 PathProgramCache]: Analyzing trace with hash 551372998, now seen corresponding path program 6 times [2022-11-18 20:51:16,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:51:16,522 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124838505] [2022-11-18 20:51:16,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:51:16,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:51:16,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:17,195 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:51:17,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:51:17,195 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124838505] [2022-11-18 20:51:17,196 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [124838505] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:51:17,196 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [335843097] [2022-11-18 20:51:17,196 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:51:17,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:51:17,196 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:51:17,197 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:51:17,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 20:51:17,323 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2022-11-18 20:51:17,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:51:17,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 20:51:17,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:51:17,700 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:51:17,700 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:51:18,474 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:51:18,475 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [335843097] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:51:18,475 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:51:18,475 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 41 [2022-11-18 20:51:18,475 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4623989] [2022-11-18 20:51:18,476 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:51:18,476 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-18 20:51:18,476 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:51:18,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-18 20:51:18,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=1305, Unknown=0, NotChecked=0, Total=1640 [2022-11-18 20:51:18,481 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-11-18 20:51:18,484 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 290 places, 272 transitions, 3941 flow. Second operand has 41 states, 41 states have (on average 56.26829268292683) internal successors, (2307), 41 states have internal predecessors, (2307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:18,484 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:51:18,484 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-11-18 20:51:18,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:51:20,586 INFO L130 PetriNetUnfolder]: 310/2249 cut-off events. [2022-11-18 20:51:20,587 INFO L131 PetriNetUnfolder]: For 146783/147092 co-relation queries the response was YES. [2022-11-18 20:51:20,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13328 conditions, 2249 events. 310/2249 cut-off events. For 146783/147092 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 17110 event pairs, 0 based on Foata normal form. 41/2048 useless extension candidates. Maximal degree in co-relation 13193. Up to 463 conditions per place. [2022-11-18 20:51:20,643 INFO L137 encePairwiseOnDemand]: 63/70 looper letters, 164 selfloop transitions, 202 changer transitions 20/431 dead transitions. [2022-11-18 20:51:20,644 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 431 transitions, 10657 flow [2022-11-18 20:51:20,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2022-11-18 20:51:20,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2022-11-18 20:51:20,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 3102 transitions. [2022-11-18 20:51:20,654 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8206349206349206 [2022-11-18 20:51:20,654 INFO L72 ComplementDD]: Start complementDD. Operand 54 states and 3102 transitions. [2022-11-18 20:51:20,654 INFO L73 IsDeterministic]: Start isDeterministic. Operand 54 states and 3102 transitions. [2022-11-18 20:51:20,657 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:51:20,657 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 54 states and 3102 transitions. [2022-11-18 20:51:20,736 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 55 states, 54 states have (on average 57.44444444444444) internal successors, (3102), 54 states have internal predecessors, (3102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:20,741 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 55 states, 55 states have (on average 70.0) internal successors, (3850), 55 states have internal predecessors, (3850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:20,742 INFO L81 ComplementDD]: Finished complementDD. Result has 55 states, 55 states have (on average 70.0) internal successors, (3850), 55 states have internal predecessors, (3850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:20,742 INFO L175 Difference]: Start difference. First operand has 290 places, 272 transitions, 3941 flow. Second operand 54 states and 3102 transitions. [2022-11-18 20:51:20,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 431 transitions, 10657 flow [2022-11-18 20:51:21,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 315 places, 431 transitions, 9906 flow, removed 348 selfloop flow, removed 21 redundant places. [2022-11-18 20:51:21,051 INFO L231 Difference]: Finished difference. Result has 339 places, 360 transitions, 5938 flow [2022-11-18 20:51:21,051 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=3538, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=272, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=130, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=54, PETRI_FLOW=5938, PETRI_PLACES=339, PETRI_TRANSITIONS=360} [2022-11-18 20:51:21,052 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 269 predicate places. [2022-11-18 20:51:21,052 INFO L495 AbstractCegarLoop]: Abstraction has has 339 places, 360 transitions, 5938 flow [2022-11-18 20:51:21,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 56.26829268292683) internal successors, (2307), 41 states have internal predecessors, (2307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:21,054 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:51:21,054 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:51:21,065 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2022-11-18 20:51:21,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-18 20:51:21,260 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:51:21,261 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:51:21,261 INFO L85 PathProgramCache]: Analyzing trace with hash 1073708870, now seen corresponding path program 7 times [2022-11-18 20:51:21,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:51:21,261 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1821681432] [2022-11-18 20:51:21,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:51:21,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:51:21,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:21,821 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 316 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:51:21,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:51:21,821 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1821681432] [2022-11-18 20:51:21,821 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1821681432] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:51:21,822 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457160880] [2022-11-18 20:51:21,822 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2022-11-18 20:51:21,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:51:21,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:51:21,823 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:51:21,843 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2022-11-18 20:51:21,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:21,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 20:51:21,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:51:22,274 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 316 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:51:22,274 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:51:23,095 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 316 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2022-11-18 20:51:23,096 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [457160880] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:51:23,096 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:51:23,096 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 41 [2022-11-18 20:51:23,096 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167665630] [2022-11-18 20:51:23,097 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:51:23,097 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2022-11-18 20:51:23,098 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:51:23,098 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2022-11-18 20:51:23,099 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=1375, Unknown=0, NotChecked=0, Total=1640 [2022-11-18 20:51:23,102 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-11-18 20:51:23,105 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 339 places, 360 transitions, 5938 flow. Second operand has 41 states, 41 states have (on average 56.26829268292683) internal successors, (2307), 41 states have internal predecessors, (2307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:23,105 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:51:23,105 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-11-18 20:51:23,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:51:25,939 INFO L130 PetriNetUnfolder]: 402/2985 cut-off events. [2022-11-18 20:51:25,939 INFO L131 PetriNetUnfolder]: For 253788/254247 co-relation queries the response was YES. [2022-11-18 20:51:25,981 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19835 conditions, 2985 events. 402/2985 cut-off events. For 253788/254247 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 24856 event pairs, 0 based on Foata normal form. 55/2720 useless extension candidates. Maximal degree in co-relation 19681. Up to 639 conditions per place. [2022-11-18 20:51:26,019 INFO L137 encePairwiseOnDemand]: 63/70 looper letters, 113 selfloop transitions, 350 changer transitions 26/534 dead transitions. [2022-11-18 20:51:26,020 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 534 transitions, 14901 flow [2022-11-18 20:51:26,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2022-11-18 20:51:26,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2022-11-18 20:51:26,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 3454 transitions. [2022-11-18 20:51:26,026 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8223809523809524 [2022-11-18 20:51:26,026 INFO L72 ComplementDD]: Start complementDD. Operand 60 states and 3454 transitions. [2022-11-18 20:51:26,026 INFO L73 IsDeterministic]: Start isDeterministic. Operand 60 states and 3454 transitions. [2022-11-18 20:51:26,027 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:51:26,028 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 60 states and 3454 transitions. [2022-11-18 20:51:26,033 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 61 states, 60 states have (on average 57.56666666666667) internal successors, (3454), 60 states have internal predecessors, (3454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:26,040 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 61 states, 61 states have (on average 70.0) internal successors, (4270), 61 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:26,041 INFO L81 ComplementDD]: Finished complementDD. Result has 61 states, 61 states have (on average 70.0) internal successors, (4270), 61 states have internal predecessors, (4270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:26,042 INFO L175 Difference]: Start difference. First operand has 339 places, 360 transitions, 5938 flow. Second operand 60 states and 3454 transitions. [2022-11-18 20:51:26,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 534 transitions, 14901 flow [2022-11-18 20:51:26,629 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 534 transitions, 13418 flow, removed 676 selfloop flow, removed 21 redundant places. [2022-11-18 20:51:26,641 INFO L231 Difference]: Finished difference. Result has 393 places, 452 transitions, 8300 flow [2022-11-18 20:51:26,642 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=5159, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=360, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=60, PETRI_FLOW=8300, PETRI_PLACES=393, PETRI_TRANSITIONS=452} [2022-11-18 20:51:26,643 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 323 predicate places. [2022-11-18 20:51:26,643 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 452 transitions, 8300 flow [2022-11-18 20:51:26,644 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 41 states have (on average 56.26829268292683) internal successors, (2307), 41 states have internal predecessors, (2307), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:26,644 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:51:26,644 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:51:26,649 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2022-11-18 20:51:26,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2022-11-18 20:51:26,846 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:51:26,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:51:26,847 INFO L85 PathProgramCache]: Analyzing trace with hash -1818459290, now seen corresponding path program 8 times [2022-11-18 20:51:26,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:51:26,847 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115689557] [2022-11-18 20:51:26,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:51:26,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:51:26,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:27,399 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:51:27,400 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:51:27,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115689557] [2022-11-18 20:51:27,400 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115689557] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:51:27,400 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1249399569] [2022-11-18 20:51:27,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 20:51:27,400 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:51:27,400 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:51:27,402 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:51:27,427 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2022-11-18 20:51:27,516 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 20:51:27,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:51:27,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 23 conjunts are in the unsatisfiable core [2022-11-18 20:51:27,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:51:27,799 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:51:27,799 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:51:28,555 INFO L134 CoverageAnalysis]: Checked inductivity of 317 backedges. 0 proven. 312 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:51:28,556 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1249399569] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:51:28,556 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:51:28,556 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 42 [2022-11-18 20:51:28,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566966584] [2022-11-18 20:51:28,558 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:51:28,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2022-11-18 20:51:28,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:51:28,562 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2022-11-18 20:51:28,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=1446, Unknown=0, NotChecked=0, Total=1722 [2022-11-18 20:51:28,566 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-11-18 20:51:28,570 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 452 transitions, 8300 flow. Second operand has 42 states, 42 states have (on average 56.285714285714285) internal successors, (2364), 42 states have internal predecessors, (2364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:28,570 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:51:28,570 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-11-18 20:51:28,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:51:32,037 INFO L130 PetriNetUnfolder]: 501/3630 cut-off events. [2022-11-18 20:51:32,037 INFO L131 PetriNetUnfolder]: For 436942/437334 co-relation queries the response was YES. [2022-11-18 20:51:32,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27399 conditions, 3630 events. 501/3630 cut-off events. For 436942/437334 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 32003 event pairs, 0 based on Foata normal form. 70/3314 useless extension candidates. Maximal degree in co-relation 27229. Up to 787 conditions per place. [2022-11-18 20:51:32,116 INFO L137 encePairwiseOnDemand]: 63/70 looper letters, 94 selfloop transitions, 466 changer transitions 29/634 dead transitions. [2022-11-18 20:51:32,117 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 444 places, 634 transitions, 18690 flow [2022-11-18 20:51:32,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2022-11-18 20:51:32,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2022-11-18 20:51:32,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 3520 transitions. [2022-11-18 20:51:32,124 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8243559718969555 [2022-11-18 20:51:32,124 INFO L72 ComplementDD]: Start complementDD. Operand 61 states and 3520 transitions. [2022-11-18 20:51:32,124 INFO L73 IsDeterministic]: Start isDeterministic. Operand 61 states and 3520 transitions. [2022-11-18 20:51:32,127 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:51:32,127 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 61 states and 3520 transitions. [2022-11-18 20:51:32,133 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 62 states, 61 states have (on average 57.704918032786885) internal successors, (3520), 61 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:32,144 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 62 states, 62 states have (on average 70.0) internal successors, (4340), 62 states have internal predecessors, (4340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:32,146 INFO L81 ComplementDD]: Finished complementDD. Result has 62 states, 62 states have (on average 70.0) internal successors, (4340), 62 states have internal predecessors, (4340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:32,146 INFO L175 Difference]: Start difference. First operand has 393 places, 452 transitions, 8300 flow. Second operand 61 states and 3520 transitions. [2022-11-18 20:51:32,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 444 places, 634 transitions, 18690 flow [2022-11-18 20:51:33,525 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 634 transitions, 15904 flow, removed 1193 selfloop flow, removed 34 redundant places. [2022-11-18 20:51:33,539 INFO L231 Difference]: Finished difference. Result has 436 places, 553 transitions, 10379 flow [2022-11-18 20:51:33,540 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=6760, PETRI_DIFFERENCE_MINUEND_PLACES=350, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=452, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=378, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=61, PETRI_FLOW=10379, PETRI_PLACES=436, PETRI_TRANSITIONS=553} [2022-11-18 20:51:33,540 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 366 predicate places. [2022-11-18 20:51:33,540 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 553 transitions, 10379 flow [2022-11-18 20:51:33,541 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 42 states have (on average 56.285714285714285) internal successors, (2364), 42 states have internal predecessors, (2364), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:33,542 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:51:33,542 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:51:33,555 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2022-11-18 20:51:33,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2022-11-18 20:51:33,748 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:51:33,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:51:33,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1712211880, now seen corresponding path program 9 times [2022-11-18 20:51:33,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:51:33,749 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934525013] [2022-11-18 20:51:33,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:51:33,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:51:33,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:34,390 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 349 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:51:34,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:51:34,390 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934525013] [2022-11-18 20:51:34,391 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934525013] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:51:34,391 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1656717819] [2022-11-18 20:51:34,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2022-11-18 20:51:34,391 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:51:34,391 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:51:34,392 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:51:34,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2022-11-18 20:51:34,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2022-11-18 20:51:34,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:51:34,540 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-18 20:51:34,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:51:34,799 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 349 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:51:34,800 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:51:35,468 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 349 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:51:35,468 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1656717819] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:51:35,469 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:51:35,469 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 44 [2022-11-18 20:51:35,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519912891] [2022-11-18 20:51:35,469 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:51:35,470 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2022-11-18 20:51:35,470 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:51:35,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2022-11-18 20:51:35,471 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=337, Invalid=1555, Unknown=0, NotChecked=0, Total=1892 [2022-11-18 20:51:35,473 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-11-18 20:51:35,476 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 553 transitions, 10379 flow. Second operand has 44 states, 44 states have (on average 56.22727272727273) internal successors, (2474), 44 states have internal predecessors, (2474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:35,476 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:51:35,476 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-11-18 20:51:35,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:51:38,587 INFO L130 PetriNetUnfolder]: 509/3685 cut-off events. [2022-11-18 20:51:38,587 INFO L131 PetriNetUnfolder]: For 545642/545954 co-relation queries the response was YES. [2022-11-18 20:51:38,664 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29617 conditions, 3685 events. 509/3685 cut-off events. For 545642/545954 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 32713 event pairs, 0 based on Foata normal form. 75/3368 useless extension candidates. Maximal degree in co-relation 29429. Up to 803 conditions per place. [2022-11-18 20:51:38,715 INFO L137 encePairwiseOnDemand]: 63/70 looper letters, 110 selfloop transitions, 461 changer transitions 8/624 dead transitions. [2022-11-18 20:51:38,716 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 470 places, 624 transitions, 16827 flow [2022-11-18 20:51:38,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2022-11-18 20:51:38,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2022-11-18 20:51:38,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 2593 transitions. [2022-11-18 20:51:38,719 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8231746031746032 [2022-11-18 20:51:38,720 INFO L72 ComplementDD]: Start complementDD. Operand 45 states and 2593 transitions. [2022-11-18 20:51:38,720 INFO L73 IsDeterministic]: Start isDeterministic. Operand 45 states and 2593 transitions. [2022-11-18 20:51:38,721 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:51:38,721 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 45 states and 2593 transitions. [2022-11-18 20:51:38,725 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 46 states, 45 states have (on average 57.62222222222222) internal successors, (2593), 45 states have internal predecessors, (2593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:38,730 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 46 states, 46 states have (on average 70.0) internal successors, (3220), 46 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:38,732 INFO L81 ComplementDD]: Finished complementDD. Result has 46 states, 46 states have (on average 70.0) internal successors, (3220), 46 states have internal predecessors, (3220), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:38,733 INFO L175 Difference]: Start difference. First operand has 436 places, 553 transitions, 10379 flow. Second operand 45 states and 2593 transitions. [2022-11-18 20:51:38,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 470 places, 624 transitions, 16827 flow [2022-11-18 20:51:40,089 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 435 places, 624 transitions, 14175 flow, removed 1115 selfloop flow, removed 35 redundant places. [2022-11-18 20:51:40,099 INFO L231 Difference]: Finished difference. Result has 443 places, 576 transitions, 10271 flow [2022-11-18 20:51:40,100 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=8641, PETRI_DIFFERENCE_MINUEND_PLACES=391, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=553, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=440, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=45, PETRI_FLOW=10271, PETRI_PLACES=443, PETRI_TRANSITIONS=576} [2022-11-18 20:51:40,100 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 373 predicate places. [2022-11-18 20:51:40,101 INFO L495 AbstractCegarLoop]: Abstraction has has 443 places, 576 transitions, 10271 flow [2022-11-18 20:51:40,102 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 56.22727272727273) internal successors, (2474), 44 states have internal predecessors, (2474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:40,102 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:51:40,102 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:51:40,108 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2022-11-18 20:51:40,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2022-11-18 20:51:40,308 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:51:40,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:51:40,309 INFO L85 PathProgramCache]: Analyzing trace with hash 182166522, now seen corresponding path program 10 times [2022-11-18 20:51:40,309 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:51:40,309 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318342476] [2022-11-18 20:51:40,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:51:40,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:51:40,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:40,846 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 349 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:51:40,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:51:40,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318342476] [2022-11-18 20:51:40,847 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318342476] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:51:40,847 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130390673] [2022-11-18 20:51:40,847 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2022-11-18 20:51:40,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:51:40,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:51:40,849 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:51:40,871 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2022-11-18 20:51:40,964 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2022-11-18 20:51:40,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:51:40,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-18 20:51:40,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:51:41,161 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 349 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:51:41,162 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:51:41,716 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 349 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:51:41,716 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130390673] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:51:41,716 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:51:41,717 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 43 [2022-11-18 20:51:41,717 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150438591] [2022-11-18 20:51:41,717 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:51:41,718 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-18 20:51:41,718 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:51:41,718 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-18 20:51:41,719 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=394, Invalid=1412, Unknown=0, NotChecked=0, Total=1806 [2022-11-18 20:51:41,721 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-11-18 20:51:41,723 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 443 places, 576 transitions, 10271 flow. Second operand has 43 states, 43 states have (on average 56.23255813953488) internal successors, (2418), 43 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:41,723 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:51:41,723 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-11-18 20:51:41,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:51:44,214 INFO L130 PetriNetUnfolder]: 530/3828 cut-off events. [2022-11-18 20:51:44,214 INFO L131 PetriNetUnfolder]: For 497746/498157 co-relation queries the response was YES. [2022-11-18 20:51:44,263 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29315 conditions, 3828 events. 530/3828 cut-off events. For 497746/498157 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 34168 event pairs, 1 based on Foata normal form. 81/3502 useless extension candidates. Maximal degree in co-relation 29128. Up to 819 conditions per place. [2022-11-18 20:51:44,325 INFO L137 encePairwiseOnDemand]: 63/70 looper letters, 108 selfloop transitions, 479 changer transitions 8/640 dead transitions. [2022-11-18 20:51:44,326 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 483 places, 640 transitions, 16340 flow [2022-11-18 20:51:44,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2022-11-18 20:51:44,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2022-11-18 20:51:44,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 2539 transitions. [2022-11-18 20:51:44,331 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8243506493506494 [2022-11-18 20:51:44,332 INFO L72 ComplementDD]: Start complementDD. Operand 44 states and 2539 transitions. [2022-11-18 20:51:44,332 INFO L73 IsDeterministic]: Start isDeterministic. Operand 44 states and 2539 transitions. [2022-11-18 20:51:44,333 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:51:44,333 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 44 states and 2539 transitions. [2022-11-18 20:51:44,339 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 45 states, 44 states have (on average 57.70454545454545) internal successors, (2539), 44 states have internal predecessors, (2539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:44,345 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 45 states, 45 states have (on average 70.0) internal successors, (3150), 45 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:44,346 INFO L81 ComplementDD]: Finished complementDD. Result has 45 states, 45 states have (on average 70.0) internal successors, (3150), 45 states have internal predecessors, (3150), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:44,346 INFO L175 Difference]: Start difference. First operand has 443 places, 576 transitions, 10271 flow. Second operand 44 states and 2539 transitions. [2022-11-18 20:51:44,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 483 places, 640 transitions, 16340 flow [2022-11-18 20:51:45,594 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 456 places, 640 transitions, 14914 flow, removed 549 selfloop flow, removed 27 redundant places. [2022-11-18 20:51:45,609 INFO L231 Difference]: Finished difference. Result has 463 places, 588 transitions, 11189 flow [2022-11-18 20:51:45,609 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=9551, PETRI_DIFFERENCE_MINUEND_PLACES=413, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=467, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=11189, PETRI_PLACES=463, PETRI_TRANSITIONS=588} [2022-11-18 20:51:45,609 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 393 predicate places. [2022-11-18 20:51:45,610 INFO L495 AbstractCegarLoop]: Abstraction has has 463 places, 588 transitions, 11189 flow [2022-11-18 20:51:45,611 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 56.23255813953488) internal successors, (2418), 43 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:45,611 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:51:45,611 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:51:45,620 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2022-11-18 20:51:45,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2022-11-18 20:51:45,818 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:51:45,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:51:45,820 INFO L85 PathProgramCache]: Analyzing trace with hash 1860242010, now seen corresponding path program 11 times [2022-11-18 20:51:45,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:51:45,820 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [315220215] [2022-11-18 20:51:45,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:51:45,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:51:45,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:46,451 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 349 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:51:46,451 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:51:46,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [315220215] [2022-11-18 20:51:46,451 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [315220215] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:51:46,451 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [129120119] [2022-11-18 20:51:46,452 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2022-11-18 20:51:46,452 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:51:46,452 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:51:46,453 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:51:46,475 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2022-11-18 20:51:46,574 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2022-11-18 20:51:46,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:51:46,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 24 conjunts are in the unsatisfiable core [2022-11-18 20:51:46,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:51:46,805 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 349 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:51:46,805 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:51:47,374 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 349 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2022-11-18 20:51:47,374 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [129120119] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:51:47,375 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:51:47,375 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 43 [2022-11-18 20:51:47,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547659727] [2022-11-18 20:51:47,375 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:51:47,376 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2022-11-18 20:51:47,376 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:51:47,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2022-11-18 20:51:47,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=393, Invalid=1413, Unknown=0, NotChecked=0, Total=1806 [2022-11-18 20:51:47,379 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-11-18 20:51:47,381 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 463 places, 588 transitions, 11189 flow. Second operand has 43 states, 43 states have (on average 56.23255813953488) internal successors, (2418), 43 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:47,381 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:51:47,381 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-11-18 20:51:47,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:51:50,284 INFO L130 PetriNetUnfolder]: 546/3942 cut-off events. [2022-11-18 20:51:50,285 INFO L131 PetriNetUnfolder]: For 444239/444660 co-relation queries the response was YES. [2022-11-18 20:51:50,335 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28833 conditions, 3942 events. 546/3942 cut-off events. For 444239/444660 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 35453 event pairs, 0 based on Foata normal form. 100/3625 useless extension candidates. Maximal degree in co-relation 28644. Up to 835 conditions per place. [2022-11-18 20:51:50,393 INFO L137 encePairwiseOnDemand]: 63/70 looper letters, 105 selfloop transitions, 503 changer transitions 17/670 dead transitions. [2022-11-18 20:51:50,394 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 509 places, 670 transitions, 17948 flow [2022-11-18 20:51:50,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2022-11-18 20:51:50,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2022-11-18 20:51:50,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 2884 transitions. [2022-11-18 20:51:50,400 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.824 [2022-11-18 20:51:50,400 INFO L72 ComplementDD]: Start complementDD. Operand 50 states and 2884 transitions. [2022-11-18 20:51:50,400 INFO L73 IsDeterministic]: Start isDeterministic. Operand 50 states and 2884 transitions. [2022-11-18 20:51:50,402 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:51:50,402 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 50 states and 2884 transitions. [2022-11-18 20:51:50,408 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 51 states, 50 states have (on average 57.68) internal successors, (2884), 50 states have internal predecessors, (2884), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:50,414 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 51 states, 51 states have (on average 70.0) internal successors, (3570), 51 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:50,416 INFO L81 ComplementDD]: Finished complementDD. Result has 51 states, 51 states have (on average 70.0) internal successors, (3570), 51 states have internal predecessors, (3570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:50,416 INFO L175 Difference]: Start difference. First operand has 463 places, 588 transitions, 11189 flow. Second operand 50 states and 2884 transitions. [2022-11-18 20:51:50,416 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 509 places, 670 transitions, 17948 flow [2022-11-18 20:51:51,547 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 670 transitions, 16532 flow, removed 309 selfloop flow, removed 39 redundant places. [2022-11-18 20:51:51,565 INFO L231 Difference]: Finished difference. Result has 480 places, 611 transitions, 12042 flow [2022-11-18 20:51:51,566 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=10075, PETRI_DIFFERENCE_MINUEND_PLACES=421, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=483, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=50, PETRI_FLOW=12042, PETRI_PLACES=480, PETRI_TRANSITIONS=611} [2022-11-18 20:51:51,567 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 410 predicate places. [2022-11-18 20:51:51,567 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 611 transitions, 12042 flow [2022-11-18 20:51:51,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 56.23255813953488) internal successors, (2418), 43 states have internal predecessors, (2418), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:51,568 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:51:51,568 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 10, 9, 9, 9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:51:51,580 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2022-11-18 20:51:51,774 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:51:51,775 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:51:51,775 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:51:51,775 INFO L85 PathProgramCache]: Analyzing trace with hash -1906598952, now seen corresponding path program 12 times [2022-11-18 20:51:51,776 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:51:51,776 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [207724653] [2022-11-18 20:51:51,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:51:51,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:51:51,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 20:51:52,366 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:51:52,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 20:51:52,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [207724653] [2022-11-18 20:51:52,366 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [207724653] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 20:51:52,366 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965245726] [2022-11-18 20:51:52,367 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2022-11-18 20:51:52,367 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:51:52,367 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 20:51:52,376 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 20:51:52,384 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2022-11-18 20:51:52,496 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2022-11-18 20:51:52,496 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 20:51:52,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 264 conjuncts, 25 conjunts are in the unsatisfiable core [2022-11-18 20:51:52,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 20:51:52,742 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:51:52,742 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 20:51:53,386 INFO L134 CoverageAnalysis]: Checked inductivity of 354 backedges. 0 proven. 354 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 20:51:53,386 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1965245726] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 20:51:53,386 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 20:51:53,386 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 46 [2022-11-18 20:51:53,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207075509] [2022-11-18 20:51:53,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 20:51:53,387 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2022-11-18 20:51:53,387 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 20:51:53,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2022-11-18 20:51:53,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=442, Invalid=1628, Unknown=0, NotChecked=0, Total=2070 [2022-11-18 20:51:53,391 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 55 out of 70 [2022-11-18 20:51:53,393 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 611 transitions, 12042 flow. Second operand has 46 states, 46 states have (on average 56.19565217391305) internal successors, (2585), 46 states have internal predecessors, (2585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:53,393 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 20:51:53,393 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 55 of 70 [2022-11-18 20:51:53,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 20:51:56,340 INFO L130 PetriNetUnfolder]: 554/3975 cut-off events. [2022-11-18 20:51:56,340 INFO L131 PetriNetUnfolder]: For 514323/514824 co-relation queries the response was YES. [2022-11-18 20:51:56,383 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30826 conditions, 3975 events. 554/3975 cut-off events. For 514323/514824 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 35689 event pairs, 0 based on Foata normal form. 113/3668 useless extension candidates. Maximal degree in co-relation 30631. Up to 837 conditions per place. [2022-11-18 20:51:56,409 INFO L137 encePairwiseOnDemand]: 63/70 looper letters, 102 selfloop transitions, 528 changer transitions 14/689 dead transitions. [2022-11-18 20:51:56,409 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 527 places, 689 transitions, 19633 flow [2022-11-18 20:51:56,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2022-11-18 20:51:56,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2022-11-18 20:51:56,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 3057 transitions. [2022-11-18 20:51:56,419 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.823989218328841 [2022-11-18 20:51:56,419 INFO L72 ComplementDD]: Start complementDD. Operand 53 states and 3057 transitions. [2022-11-18 20:51:56,419 INFO L73 IsDeterministic]: Start isDeterministic. Operand 53 states and 3057 transitions. [2022-11-18 20:51:56,421 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 20:51:56,421 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 53 states and 3057 transitions. [2022-11-18 20:51:56,425 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 54 states, 53 states have (on average 57.679245283018865) internal successors, (3057), 53 states have internal predecessors, (3057), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:56,430 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 54 states, 54 states have (on average 70.0) internal successors, (3780), 54 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:56,431 INFO L81 ComplementDD]: Finished complementDD. Result has 54 states, 54 states have (on average 70.0) internal successors, (3780), 54 states have internal predecessors, (3780), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:56,431 INFO L175 Difference]: Start difference. First operand has 480 places, 611 transitions, 12042 flow. Second operand 53 states and 3057 transitions. [2022-11-18 20:51:56,431 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 527 places, 689 transitions, 19633 flow [2022-11-18 20:51:57,398 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 484 places, 689 transitions, 17802 flow, removed 495 selfloop flow, removed 43 redundant places. [2022-11-18 20:51:57,409 INFO L231 Difference]: Finished difference. Result has 496 places, 621 transitions, 12553 flow [2022-11-18 20:51:57,410 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=70, PETRI_DIFFERENCE_MINUEND_FLOW=10563, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=611, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=519, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=53, PETRI_FLOW=12553, PETRI_PLACES=496, PETRI_TRANSITIONS=621} [2022-11-18 20:51:57,410 INFO L288 CegarLoopForPetriNet]: 70 programPoint places, 426 predicate places. [2022-11-18 20:51:57,411 INFO L495 AbstractCegarLoop]: Abstraction has has 496 places, 621 transitions, 12553 flow [2022-11-18 20:51:57,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 56.19565217391305) internal successors, (2585), 46 states have internal predecessors, (2585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 20:51:57,411 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 20:51:57,411 INFO L209 CegarLoopForPetriNet]: trace histogram [10, 10, 10, 10, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 20:51:57,424 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2022-11-18 20:51:57,612 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 20:51:57,612 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES] === [2022-11-18 20:51:57,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 20:51:57,613 INFO L85 PathProgramCache]: Analyzing trace with hash 333952072, now seen corresponding path program 13 times [2022-11-18 20:51:57,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 20:51:57,613 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296615669] [2022-11-18 20:51:57,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 20:51:57,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 20:51:57,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:51:57,636 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2022-11-18 20:51:57,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2022-11-18 20:51:57,792 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2022-11-18 20:51:57,792 INFO L359 BasicCegarLoop]: Counterexample is feasible [2022-11-18 20:51:57,793 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION (2 of 3 remaining) [2022-11-18 20:51:57,795 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (1 of 3 remaining) [2022-11-18 20:51:57,796 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (0 of 3 remaining) [2022-11-18 20:51:57,796 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2022-11-18 20:51:57,797 INFO L444 BasicCegarLoop]: Path program histogram: [13, 2, 2, 1, 1, 1] [2022-11-18 20:51:57,803 INFO L228 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2022-11-18 20:51:57,803 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2022-11-18 20:51:57,914 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 18.11 08:51:57 BasicIcfg [2022-11-18 20:51:57,914 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2022-11-18 20:51:57,915 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2022-11-18 20:51:57,915 INFO L271 PluginConnector]: Initializing Witness Printer... [2022-11-18 20:51:57,915 INFO L275 PluginConnector]: Witness Printer initialized [2022-11-18 20:51:57,916 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 08:50:58" (3/4) ... [2022-11-18 20:51:57,918 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2022-11-18 20:51:58,061 INFO L141 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/witness.graphml [2022-11-18 20:51:58,062 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2022-11-18 20:51:58,063 INFO L158 Benchmark]: Toolchain (without parser) took 60937.58ms. Allocated memory was 132.1MB in the beginning and 6.4GB in the end (delta: 6.2GB). Free memory was 91.6MB in the beginning and 5.5GB in the end (delta: -5.4GB). Peak memory consumption was 777.8MB. Max. memory is 16.1GB. [2022-11-18 20:51:58,063 INFO L158 Benchmark]: CDTParser took 0.28ms. Allocated memory is still 132.1MB. Free memory is still 109.4MB. There was no memory consumed. Max. memory is 16.1GB. [2022-11-18 20:51:58,063 INFO L158 Benchmark]: CACSL2BoogieTranslator took 734.51ms. Allocated memory is still 132.1MB. Free memory was 91.4MB in the beginning and 96.3MB in the end (delta: -4.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-18 20:51:58,064 INFO L158 Benchmark]: Boogie Procedure Inliner took 67.08ms. Allocated memory is still 132.1MB. Free memory was 96.3MB in the beginning and 94.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-18 20:51:58,064 INFO L158 Benchmark]: Boogie Preprocessor took 54.19ms. Allocated memory is still 132.1MB. Free memory was 94.6MB in the beginning and 93.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2022-11-18 20:51:58,065 INFO L158 Benchmark]: RCFGBuilder took 547.10ms. Allocated memory is still 132.1MB. Free memory was 93.0MB in the beginning and 80.9MB in the end (delta: 12.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. [2022-11-18 20:51:58,065 INFO L158 Benchmark]: TraceAbstraction took 59378.07ms. Allocated memory was 132.1MB in the beginning and 6.4GB in the end (delta: 6.2GB). Free memory was 80.0MB in the beginning and 5.6GB in the end (delta: -5.5GB). Peak memory consumption was 989.7MB. Max. memory is 16.1GB. [2022-11-18 20:51:58,065 INFO L158 Benchmark]: Witness Printer took 147.33ms. Allocated memory is still 6.4GB. Free memory was 5.6GB in the beginning and 5.5GB in the end (delta: 23.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. [2022-11-18 20:51:58,067 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.28ms. Allocated memory is still 132.1MB. Free memory is still 109.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 734.51ms. Allocated memory is still 132.1MB. Free memory was 91.4MB in the beginning and 96.3MB in the end (delta: -4.9MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 67.08ms. Allocated memory is still 132.1MB. Free memory was 96.3MB in the beginning and 94.6MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 54.19ms. Allocated memory is still 132.1MB. Free memory was 94.6MB in the beginning and 93.0MB in the end (delta: 1.6MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 547.10ms. Allocated memory is still 132.1MB. Free memory was 93.0MB in the beginning and 80.9MB in the end (delta: 12.1MB). Peak memory consumption was 10.5MB. Max. memory is 16.1GB. * TraceAbstraction took 59378.07ms. Allocated memory was 132.1MB in the beginning and 6.4GB in the end (delta: 6.2GB). Free memory was 80.0MB in the beginning and 5.6GB in the end (delta: -5.5GB). Peak memory consumption was 989.7MB. Max. memory is 16.1GB. * Witness Printer took 147.33ms. Allocated memory is still 6.4GB. Free memory was 5.6GB in the beginning and 5.5GB in the end (delta: 23.1MB). Peak memory consumption was 23.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - CounterExampleResult [Line: 722]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L694] 0 int i = 3, j = 6; VAL [i=3, j=6] [L712] 0 pthread_t id1, id2; VAL [\old(argc)=49, argc=49, argv={51:50}, argv={51:50}, i=3, id1={5:0}, id2={3:0}, j=6] [L713] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [\old(argc)=49, arg={0:0}, argc=49, argv={51:50}, argv={51:50}, i=3, id1={5:0}, id2={3:0}, j=6, pthread_create(&id1, ((void *)0), t1, ((void *)0))=6] [L696] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L714] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [\old(argc)=49, arg={0:0}, arg={0:0}, arg={0:0}, argc=49, argv={51:50}, argv={51:50}, i=3, id1={5:0}, id2={3:0}, j=6, k=0, pthread_create(&id2, ((void *)0), t2, ((void *)0))=7] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0] [L704] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=0] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=0] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=0, k=0] [L716] 0 int condI = i >= (2*10 +6); VAL [\old(argc)=49, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=49, argv={51:50}, argv={51:50}, condI=0, i=7, id1={5:0}, id2={3:0}, j=8, k=0, k=0] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=0] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=0] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=0, k=1] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=1] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=1] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=1, k=1] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=1] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=1] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=2] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=2, k=2] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=2, k=3] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=2, k=3] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=2, k=3] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=3] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=3, k=3] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=3, k=3] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=3, k=4] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=3, k=4] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=3] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=4] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=4, k=4] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=4] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=5] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=4, k=5] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=4] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=5] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=5, k=5] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=5, k=5] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=5, k=6] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=5, k=6] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=5] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=6] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=6] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=6, k=6] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=6] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=6] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=7, k=6] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=7, k=7] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=7, k=7] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=7, k=7] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=7] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=7] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=7, k=8] [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=7, k=9] [L696] COND TRUE 1 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=9, k=7] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=9, k=8] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=9, k=8] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=8, k=9] [L698] 1 i = j + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=8, k=9] [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=9, k=9] [L704] COND TRUE 2 k < 10 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=9, k=9] [L706] 2 j = i + 1 VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=9, k=9] [L719] 0 int condJ = j >= (2*10 +6); VAL [\old(argc)=49, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=49, argv={51:50}, argv={51:50}, condI=0, condJ=1, i=25, id1={5:0}, id2={3:0}, j=26, k=9, k=9] [L721] COND TRUE 0 condI || condJ VAL [\old(argc)=49, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=49, argv={51:50}, argv={51:50}, condI=0, condJ=1, i=25, id1={5:0}, id2={3:0}, j=26, k=9, k=9] [L722] 0 reach_error() VAL [\old(argc)=49, arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, argc=49, argv={51:50}, argv={51:50}, condI=0, condJ=1, i=25, id1={5:0}, id2={3:0}, j=26, k=9, k=9] - UnprovableResult [Line: 713]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - UnprovableResult [Line: 714]: Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 88 locations, 3 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 59.1s, OverallIterations: 20, TraceHistogramMax: 10, PathProgramHistogramMax: 13, EmptinessCheckTime: 0.0s, AutomataDifference: 35.8s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.1s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2962 SdHoareTripleChecker+Valid, 2.7s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2962 mSDsluCounter, 348 SdHoareTripleChecker+Invalid, 2.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 261 mSDsCounter, 645 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 3238 IncrementalHoareTripleChecker+Invalid, 3883 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 645 mSolverCounterUnsat, 87 mSDtfsCounter, 3238 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 3390 GetRequests, 2443 SyntacticMatches, 6 SemanticMatches, 941 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20031 ImplicationChecksByTransitivity, 16.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=12553occurred in iteration=19, InterpolantAutomatonStates: 623, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 17.8s InterpolantComputationTime, 3009 NumberOfCodeBlocks, 3004 NumberOfCodeBlocksAsserted, 84 NumberOfCheckSat, 4150 ConstructedInterpolants, 0 QuantifiedInterpolants, 16211 SizeOfPredicates, 181 NumberOfNonLiveVariables, 2872 ConjunctsInSsa, 246 ConjunctsInUnsatCore, 45 InterpolantComputations, 6 PerfectInterpolantSequences, 138/8442 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2022-11-18 20:51:58,091 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_11adcc3e-bb94-454b-aaff-58a687148012/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE