./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/pthread/stack_longest-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_1ae1e281-a220-45f3-a1d9-cdb616d889fd/bin/uautomizer-TMbwUNV5ro/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae1e281-a220-45f3-a1d9-cdb616d889fd/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_1ae1e281-a220-45f3-a1d9-cdb616d889fd/bin/uautomizer-TMbwUNV5ro/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae1e281-a220-45f3-a1d9-cdb616d889fd/bin/uautomizer-TMbwUNV5ro/config/AutomizerReach.xml -i ../../sv-benchmarks/c/pthread/stack_longest-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae1e281-a220-45f3-a1d9-cdb616d889fd/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_1ae1e281-a220-45f3-a1d9-cdb616d889fd/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 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 --- 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 21:01:20,625 INFO L177 SettingsManager]: Resetting all preferences to default values... [2022-11-18 21:01:20,630 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2022-11-18 21:01:20,650 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2022-11-18 21:01:20,651 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2022-11-18 21:01:20,652 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2022-11-18 21:01:20,653 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2022-11-18 21:01:20,655 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2022-11-18 21:01:20,657 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2022-11-18 21:01:20,658 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2022-11-18 21:01:20,659 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2022-11-18 21:01:20,660 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2022-11-18 21:01:20,661 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2022-11-18 21:01:20,662 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2022-11-18 21:01:20,663 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2022-11-18 21:01:20,664 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2022-11-18 21:01:20,665 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2022-11-18 21:01:20,666 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2022-11-18 21:01:20,668 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2022-11-18 21:01:20,670 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2022-11-18 21:01:20,672 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2022-11-18 21:01:20,673 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2022-11-18 21:01:20,675 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2022-11-18 21:01:20,676 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2022-11-18 21:01:20,679 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2022-11-18 21:01:20,680 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2022-11-18 21:01:20,680 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2022-11-18 21:01:20,681 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2022-11-18 21:01:20,682 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2022-11-18 21:01:20,683 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2022-11-18 21:01:20,683 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2022-11-18 21:01:20,684 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2022-11-18 21:01:20,685 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2022-11-18 21:01:20,686 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2022-11-18 21:01:20,687 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2022-11-18 21:01:20,687 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2022-11-18 21:01:20,688 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2022-11-18 21:01:20,689 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2022-11-18 21:01:20,689 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2022-11-18 21:01:20,690 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2022-11-18 21:01:20,691 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2022-11-18 21:01:20,692 INFO L101 SettingsManager]: Beginning loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae1e281-a220-45f3-a1d9-cdb616d889fd/bin/uautomizer-TMbwUNV5ro/config/svcomp-Reach-32bit-Automizer_Default.epf [2022-11-18 21:01:20,714 INFO L113 SettingsManager]: Loading preferences was successful [2022-11-18 21:01:20,714 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2022-11-18 21:01:20,715 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2022-11-18 21:01:20,715 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2022-11-18 21:01:20,716 INFO L136 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2022-11-18 21:01:20,716 INFO L138 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2022-11-18 21:01:20,717 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2022-11-18 21:01:20,717 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2022-11-18 21:01:20,717 INFO L138 SettingsManager]: * Use SBE=true [2022-11-18 21:01:20,717 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2022-11-18 21:01:20,718 INFO L138 SettingsManager]: * sizeof long=4 [2022-11-18 21:01:20,718 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2022-11-18 21:01:20,718 INFO L138 SettingsManager]: * sizeof POINTER=4 [2022-11-18 21:01:20,718 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2022-11-18 21:01:20,719 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2022-11-18 21:01:20,719 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2022-11-18 21:01:20,719 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2022-11-18 21:01:20,719 INFO L138 SettingsManager]: * sizeof long double=12 [2022-11-18 21:01:20,720 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2022-11-18 21:01:20,720 INFO L138 SettingsManager]: * Use constant arrays=true [2022-11-18 21:01:20,720 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2022-11-18 21:01:20,721 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2022-11-18 21:01:20,721 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2022-11-18 21:01:20,721 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2022-11-18 21:01:20,721 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 21:01:20,722 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2022-11-18 21:01:20,722 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2022-11-18 21:01:20,722 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2022-11-18 21:01:20,722 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2022-11-18 21:01:20,723 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2022-11-18 21:01:20,723 INFO L138 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2022-11-18 21:01:20,723 INFO L138 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2022-11-18 21:01:20,723 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2022-11-18 21:01:20,724 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_1ae1e281-a220-45f3-a1d9-cdb616d889fd/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae1e281-a220-45f3-a1d9-cdb616d889fd/bin/uautomizer-TMbwUNV5ro Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5773bc320dd9dee5d943610df8c4ec3040864edddf388dd42a51d37167245e47 [2022-11-18 21:01:20,941 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2022-11-18 21:01:20,962 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2022-11-18 21:01:20,965 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2022-11-18 21:01:20,966 INFO L271 PluginConnector]: Initializing CDTParser... [2022-11-18 21:01:20,967 INFO L275 PluginConnector]: CDTParser initialized [2022-11-18 21:01:20,968 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae1e281-a220-45f3-a1d9-cdb616d889fd/bin/uautomizer-TMbwUNV5ro/../../sv-benchmarks/c/pthread/stack_longest-2.i [2022-11-18 21:01:21,053 INFO L220 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae1e281-a220-45f3-a1d9-cdb616d889fd/bin/uautomizer-TMbwUNV5ro/data/b5a1521cf/af2b6df943be40d68cd552cf25eed665/FLAG4e9d8f520 [2022-11-18 21:01:21,678 INFO L306 CDTParser]: Found 1 translation units. [2022-11-18 21:01:21,679 INFO L160 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae1e281-a220-45f3-a1d9-cdb616d889fd/sv-benchmarks/c/pthread/stack_longest-2.i [2022-11-18 21:01:21,694 INFO L349 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae1e281-a220-45f3-a1d9-cdb616d889fd/bin/uautomizer-TMbwUNV5ro/data/b5a1521cf/af2b6df943be40d68cd552cf25eed665/FLAG4e9d8f520 [2022-11-18 21:01:21,954 INFO L357 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae1e281-a220-45f3-a1d9-cdb616d889fd/bin/uautomizer-TMbwUNV5ro/data/b5a1521cf/af2b6df943be40d68cd552cf25eed665 [2022-11-18 21:01:21,957 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2022-11-18 21:01:21,958 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2022-11-18 21:01:21,959 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2022-11-18 21:01:21,960 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2022-11-18 21:01:21,963 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2022-11-18 21:01:21,964 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 09:01:21" (1/1) ... [2022-11-18 21:01:21,965 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1d44a9b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:01:21, skipping insertion in model container [2022-11-18 21:01:21,966 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 18.11 09:01:21" (1/1) ... [2022-11-18 21:01:21,973 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2022-11-18 21:01:22,014 INFO L178 MainTranslator]: Built tables and reachable declarations [2022-11-18 21:01:22,556 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_1ae1e281-a220-45f3-a1d9-cdb616d889fd/sv-benchmarks/c/pthread/stack_longest-2.i[41530,41543] [2022-11-18 21:01:22,584 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 21:01:22,600 INFO L203 MainTranslator]: Completed pre-run [2022-11-18 21:01:22,646 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_1ae1e281-a220-45f3-a1d9-cdb616d889fd/sv-benchmarks/c/pthread/stack_longest-2.i[41530,41543] [2022-11-18 21:01:22,671 INFO L210 PostProcessor]: Analyzing one entry point: main [2022-11-18 21:01:22,725 INFO L208 MainTranslator]: Completed translation [2022-11-18 21:01:22,725 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:01:22 WrapperNode [2022-11-18 21:01:22,725 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2022-11-18 21:01:22,727 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2022-11-18 21:01:22,727 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2022-11-18 21:01:22,727 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2022-11-18 21:01:22,735 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:01:22" (1/1) ... [2022-11-18 21:01:22,763 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:01:22" (1/1) ... [2022-11-18 21:01:22,796 INFO L138 Inliner]: procedures = 277, calls = 38, calls flagged for inlining = 11, calls inlined = 11, statements flattened = 148 [2022-11-18 21:01:22,796 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2022-11-18 21:01:22,797 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2022-11-18 21:01:22,797 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2022-11-18 21:01:22,797 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2022-11-18 21:01:22,810 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:01:22" (1/1) ... [2022-11-18 21:01:22,811 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:01:22" (1/1) ... [2022-11-18 21:01:22,830 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:01:22" (1/1) ... [2022-11-18 21:01:22,830 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:01:22" (1/1) ... [2022-11-18 21:01:22,838 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:01:22" (1/1) ... [2022-11-18 21:01:22,842 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:01:22" (1/1) ... [2022-11-18 21:01:22,844 INFO L185 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:01:22" (1/1) ... [2022-11-18 21:01:22,846 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:01:22" (1/1) ... [2022-11-18 21:01:22,849 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2022-11-18 21:01:22,849 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2022-11-18 21:01:22,850 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2022-11-18 21:01:22,850 INFO L275 PluginConnector]: RCFGBuilder initialized [2022-11-18 21:01:22,859 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:01:22" (1/1) ... [2022-11-18 21:01:22,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2022-11-18 21:01:22,882 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae1e281-a220-45f3-a1d9-cdb616d889fd/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:01:22,896 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae1e281-a220-45f3-a1d9-cdb616d889fd/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2022-11-18 21:01:22,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae1e281-a220-45f3-a1d9-cdb616d889fd/bin/uautomizer-TMbwUNV5ro/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2022-11-18 21:01:22,942 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2022-11-18 21:01:22,943 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2022-11-18 21:01:22,943 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2022-11-18 21:01:22,943 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2022-11-18 21:01:22,943 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2022-11-18 21:01:22,943 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2022-11-18 21:01:22,944 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2022-11-18 21:01:22,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2022-11-18 21:01:22,944 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2022-11-18 21:01:22,944 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2022-11-18 21:01:22,945 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2022-11-18 21:01:22,945 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2022-11-18 21:01:22,945 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2022-11-18 21:01:22,947 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 21:01:23,126 INFO L235 CfgBuilder]: Building ICFG [2022-11-18 21:01:23,128 INFO L261 CfgBuilder]: Building CFG for each procedure with an implementation [2022-11-18 21:01:23,437 INFO L276 CfgBuilder]: Performing block encoding [2022-11-18 21:01:23,446 INFO L295 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2022-11-18 21:01:23,446 INFO L300 CfgBuilder]: Removed 2 assume(true) statements. [2022-11-18 21:01:23,448 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:01:23 BoogieIcfgContainer [2022-11-18 21:01:23,449 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2022-11-18 21:01:23,451 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2022-11-18 21:01:23,451 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2022-11-18 21:01:23,479 INFO L275 PluginConnector]: TraceAbstraction initialized [2022-11-18 21:01:23,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 18.11 09:01:21" (1/3) ... [2022-11-18 21:01:23,479 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72502c11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 09:01:23, skipping insertion in model container [2022-11-18 21:01:23,479 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 18.11 09:01:22" (2/3) ... [2022-11-18 21:01:23,480 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@72502c11 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 18.11 09:01:23, skipping insertion in model container [2022-11-18 21:01:23,480 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 18.11 09:01:23" (3/3) ... [2022-11-18 21:01:23,481 INFO L112 eAbstractionObserver]: Analyzing ICFG stack_longest-2.i [2022-11-18 21:01:23,489 WARN L145 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2022-11-18 21:01:23,500 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2022-11-18 21:01:23,500 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 2 error locations. [2022-11-18 21:01:23,500 INFO L515 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2022-11-18 21:01:23,669 INFO L144 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2022-11-18 21:01:23,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 167 places, 170 transitions, 356 flow [2022-11-18 21:01:23,854 INFO L130 PetriNetUnfolder]: 10/168 cut-off events. [2022-11-18 21:01:23,854 INFO L131 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2022-11-18 21:01:23,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 168 events. 10/168 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 411 event pairs, 0 based on Foata normal form. 0/156 useless extension candidates. Maximal degree in co-relation 126. Up to 3 conditions per place. [2022-11-18 21:01:23,863 INFO L82 GeneralOperation]: Start removeDead. Operand has 167 places, 170 transitions, 356 flow [2022-11-18 21:01:23,872 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 155 places, 158 transitions, 325 flow [2022-11-18 21:01:23,889 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2022-11-18 21:01:23,899 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;@49f95046, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2022-11-18 21:01:23,899 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2022-11-18 21:01:23,950 INFO L130 PetriNetUnfolder]: 5/127 cut-off events. [2022-11-18 21:01:23,950 INFO L131 PetriNetUnfolder]: For 1/1 co-relation queries the response was YES. [2022-11-18 21:01:23,951 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 21:01:23,952 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:01:23,953 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 21:01:23,957 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:01:23,958 INFO L85 PathProgramCache]: Analyzing trace with hash -97581397, now seen corresponding path program 1 times [2022-11-18 21:01:23,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:01:23,968 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628193954] [2022-11-18 21:01:23,968 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:01:23,969 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:01:24,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:24,386 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 21:01:24,386 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:01:24,387 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628193954] [2022-11-18 21:01:24,387 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628193954] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:01:24,388 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:01:24,388 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:01:24,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335338990] [2022-11-18 21:01:24,390 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:01:24,399 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 21:01:24,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:01:24,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 21:01:24,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 21:01:24,440 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 170 [2022-11-18 21:01:24,447 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 158 transitions, 325 flow. Second operand has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states 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 21:01:24,448 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 21:01:24,448 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 170 [2022-11-18 21:01:24,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 21:01:24,646 INFO L130 PetriNetUnfolder]: 88/697 cut-off events. [2022-11-18 21:01:24,646 INFO L131 PetriNetUnfolder]: For 43/43 co-relation queries the response was YES. [2022-11-18 21:01:24,651 INFO L83 FinitePrefix]: Finished finitePrefix Result has 880 conditions, 697 events. 88/697 cut-off events. For 43/43 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 3094 event pairs, 32 based on Foata normal form. 69/700 useless extension candidates. Maximal degree in co-relation 747. Up to 111 conditions per place. [2022-11-18 21:01:24,654 INFO L137 encePairwiseOnDemand]: 160/170 looper letters, 20 selfloop transitions, 3 changer transitions 0/156 dead transitions. [2022-11-18 21:01:24,655 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 153 places, 156 transitions, 373 flow [2022-11-18 21:01:24,657 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 21:01:24,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 21:01:24,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 473 transitions. [2022-11-18 21:01:24,679 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9274509803921569 [2022-11-18 21:01:24,680 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 473 transitions. [2022-11-18 21:01:24,681 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 473 transitions. [2022-11-18 21:01:24,685 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 21:01:24,688 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 473 transitions. [2022-11-18 21:01:24,693 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 157.66666666666666) internal successors, (473), 3 states have internal predecessors, (473), 0 states have call successors, (0), 0 states 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 21:01:24,702 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 170.0) internal successors, (680), 4 states have internal predecessors, (680), 0 states have call successors, (0), 0 states 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 21:01:24,703 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 170.0) internal successors, (680), 4 states have internal predecessors, (680), 0 states have call successors, (0), 0 states 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 21:01:24,705 INFO L175 Difference]: Start difference. First operand has 155 places, 158 transitions, 325 flow. Second operand 3 states and 473 transitions. [2022-11-18 21:01:24,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 153 places, 156 transitions, 373 flow [2022-11-18 21:01:24,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 150 places, 156 transitions, 365 flow, removed 0 selfloop flow, removed 3 redundant places. [2022-11-18 21:01:24,716 INFO L231 Difference]: Finished difference. Result has 151 places, 150 transitions, 319 flow [2022-11-18 21:01:24,719 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=148, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=149, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=319, PETRI_PLACES=151, PETRI_TRANSITIONS=150} [2022-11-18 21:01:24,724 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, -4 predicate places. [2022-11-18 21:01:24,724 INFO L495 AbstractCegarLoop]: Abstraction has has 151 places, 150 transitions, 319 flow [2022-11-18 21:01:24,725 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 147.66666666666666) internal successors, (443), 3 states have internal predecessors, (443), 0 states have call successors, (0), 0 states 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 21:01:24,725 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 21:01:24,726 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:01:24,726 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2022-11-18 21:01:24,727 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 21:01:24,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:01:24,728 INFO L85 PathProgramCache]: Analyzing trace with hash -1849244650, now seen corresponding path program 1 times [2022-11-18 21:01:24,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:01:24,729 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844770806] [2022-11-18 21:01:24,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:01:24,729 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:01:24,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:25,042 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 21:01:25,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:01:25,043 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844770806] [2022-11-18 21:01:25,043 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [844770806] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:01:25,043 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:01:25,043 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2022-11-18 21:01:25,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517983238] [2022-11-18 21:01:25,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:01:25,045 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2022-11-18 21:01:25,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:01:25,046 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2022-11-18 21:01:25,046 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2022-11-18 21:01:25,047 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 150 out of 170 [2022-11-18 21:01:25,048 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 150 transitions, 319 flow. Second operand has 4 states, 4 states have (on average 151.75) internal successors, (607), 4 states have internal predecessors, (607), 0 states have call successors, (0), 0 states 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 21:01:25,048 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 21:01:25,048 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 150 of 170 [2022-11-18 21:01:25,048 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 21:01:25,223 INFO L130 PetriNetUnfolder]: 34/588 cut-off events. [2022-11-18 21:01:25,224 INFO L131 PetriNetUnfolder]: For 10/10 co-relation queries the response was YES. [2022-11-18 21:01:25,228 INFO L83 FinitePrefix]: Finished finitePrefix Result has 709 conditions, 588 events. 34/588 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 2043 event pairs, 11 based on Foata normal form. 0/551 useless extension candidates. Maximal degree in co-relation 411. Up to 45 conditions per place. [2022-11-18 21:01:25,230 INFO L137 encePairwiseOnDemand]: 165/170 looper letters, 16 selfloop transitions, 4 changer transitions 0/158 dead transitions. [2022-11-18 21:01:25,231 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 158 transitions, 380 flow [2022-11-18 21:01:25,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2022-11-18 21:01:25,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2022-11-18 21:01:25,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 621 transitions. [2022-11-18 21:01:25,234 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.913235294117647 [2022-11-18 21:01:25,234 INFO L72 ComplementDD]: Start complementDD. Operand 4 states and 621 transitions. [2022-11-18 21:01:25,234 INFO L73 IsDeterministic]: Start isDeterministic. Operand 4 states and 621 transitions. [2022-11-18 21:01:25,235 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 21:01:25,235 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 4 states and 621 transitions. [2022-11-18 21:01:25,236 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 5 states, 4 states have (on average 155.25) internal successors, (621), 4 states have internal predecessors, (621), 0 states have call successors, (0), 0 states 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 21:01:25,239 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 5 states, 5 states have (on average 170.0) internal successors, (850), 5 states have internal predecessors, (850), 0 states have call successors, (0), 0 states 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 21:01:25,239 INFO L81 ComplementDD]: Finished complementDD. Result has 5 states, 5 states have (on average 170.0) internal successors, (850), 5 states have internal predecessors, (850), 0 states have call successors, (0), 0 states 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 21:01:25,240 INFO L175 Difference]: Start difference. First operand has 151 places, 150 transitions, 319 flow. Second operand 4 states and 621 transitions. [2022-11-18 21:01:25,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 158 transitions, 380 flow [2022-11-18 21:01:25,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 158 transitions, 377 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 21:01:25,246 INFO L231 Difference]: Finished difference. Result has 155 places, 153 transitions, 344 flow [2022-11-18 21:01:25,247 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=316, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=344, PETRI_PLACES=155, PETRI_TRANSITIONS=153} [2022-11-18 21:01:25,248 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 0 predicate places. [2022-11-18 21:01:25,248 INFO L495 AbstractCegarLoop]: Abstraction has has 155 places, 153 transitions, 344 flow [2022-11-18 21:01:25,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 151.75) internal successors, (607), 4 states have internal predecessors, (607), 0 states have call successors, (0), 0 states 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 21:01:25,249 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 21:01:25,249 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:01:25,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2022-11-18 21:01:25,251 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 21:01:25,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:01:25,251 INFO L85 PathProgramCache]: Analyzing trace with hash -228812281, now seen corresponding path program 1 times [2022-11-18 21:01:25,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:01:25,252 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021620737] [2022-11-18 21:01:25,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:01:25,253 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:01:25,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:25,443 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 21:01:25,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:01:25,445 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021620737] [2022-11-18 21:01:25,445 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021620737] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:01:25,445 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:01:25,446 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:01:25,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726924141] [2022-11-18 21:01:25,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:01:25,448 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 21:01:25,448 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:01:25,449 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 21:01:25,449 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 21:01:25,451 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 146 out of 170 [2022-11-18 21:01:25,452 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 153 transitions, 344 flow. Second operand has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:25,452 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 21:01:25,452 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 146 of 170 [2022-11-18 21:01:25,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 21:01:25,766 INFO L130 PetriNetUnfolder]: 127/1265 cut-off events. [2022-11-18 21:01:25,766 INFO L131 PetriNetUnfolder]: For 90/100 co-relation queries the response was YES. [2022-11-18 21:01:25,771 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1670 conditions, 1265 events. 127/1265 cut-off events. For 90/100 co-relation queries the response was YES. Maximal size of possible extension queue 25. Compared 6972 event pairs, 33 based on Foata normal form. 12/1203 useless extension candidates. Maximal degree in co-relation 1334. Up to 135 conditions per place. [2022-11-18 21:01:25,777 INFO L137 encePairwiseOnDemand]: 164/170 looper letters, 25 selfloop transitions, 4 changer transitions 0/165 dead transitions. [2022-11-18 21:01:25,777 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 165 transitions, 435 flow [2022-11-18 21:01:25,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 21:01:25,778 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 21:01:25,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 468 transitions. [2022-11-18 21:01:25,779 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9176470588235294 [2022-11-18 21:01:25,780 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 468 transitions. [2022-11-18 21:01:25,780 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 468 transitions. [2022-11-18 21:01:25,780 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 21:01:25,780 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 468 transitions. [2022-11-18 21:01:25,782 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 156.0) internal successors, (468), 3 states have internal predecessors, (468), 0 states have call successors, (0), 0 states 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 21:01:25,783 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 170.0) internal successors, (680), 4 states have internal predecessors, (680), 0 states have call successors, (0), 0 states 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 21:01:25,784 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 170.0) internal successors, (680), 4 states have internal predecessors, (680), 0 states have call successors, (0), 0 states 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 21:01:25,784 INFO L175 Difference]: Start difference. First operand has 155 places, 153 transitions, 344 flow. Second operand 3 states and 468 transitions. [2022-11-18 21:01:25,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 165 transitions, 435 flow [2022-11-18 21:01:25,788 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 165 transitions, 433 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 21:01:25,793 INFO L231 Difference]: Finished difference. Result has 158 places, 157 transitions, 384 flow [2022-11-18 21:01:25,793 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=342, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=153, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=0, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=149, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=384, PETRI_PLACES=158, PETRI_TRANSITIONS=157} [2022-11-18 21:01:25,795 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 3 predicate places. [2022-11-18 21:01:25,796 INFO L495 AbstractCegarLoop]: Abstraction has has 158 places, 157 transitions, 384 flow [2022-11-18 21:01:25,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 149.0) internal successors, (447), 3 states have internal predecessors, (447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:25,797 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 21:01:25,798 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:01:25,798 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2022-11-18 21:01:25,798 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 21:01:25,799 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:01:25,799 INFO L85 PathProgramCache]: Analyzing trace with hash -1181773498, now seen corresponding path program 1 times [2022-11-18 21:01:25,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:01:25,800 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294192725] [2022-11-18 21:01:25,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:01:25,800 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:01:25,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:26,056 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:01:26,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:01:26,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294192725] [2022-11-18 21:01:26,057 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294192725] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:01:26,057 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13362520] [2022-11-18 21:01:26,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:01:26,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:01:26,058 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae1e281-a220-45f3-a1d9-cdb616d889fd/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:01:26,062 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae1e281-a220-45f3-a1d9-cdb616d889fd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:01:26,085 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae1e281-a220-45f3-a1d9-cdb616d889fd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2022-11-18 21:01:26,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:26,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 238 conjuncts, 4 conjunts are in the unsatisfiable core [2022-11-18 21:01:26,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:01:26,478 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:01:26,478 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:01:26,639 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:01:26,639 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [13362520] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:01:26,639 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:01:26,640 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2022-11-18 21:01:26,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332418706] [2022-11-18 21:01:26,640 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:01:26,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2022-11-18 21:01:26,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:01:26,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2022-11-18 21:01:26,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=60, Unknown=0, NotChecked=0, Total=90 [2022-11-18 21:01:26,647 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 144 out of 170 [2022-11-18 21:01:26,650 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 157 transitions, 384 flow. Second operand has 10 states, 10 states have (on average 146.5) internal successors, (1465), 10 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states 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 21:01:26,650 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 21:01:26,650 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 144 of 170 [2022-11-18 21:01:26,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 21:01:27,255 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([460] L1008-->L1010: Formula: (< 0 v_~top~0_7) InVars {~top~0=v_~top~0_7} OutVars{~top~0=v_~top~0_7} AuxVars[] AssignedVars[][178], [26#L1022-4true, 33#L1010true, Black: 177#(= |t1Thread1of1ForFork1_push_#res#1| 0), t2Thread1of1ForFork0InUse, 85#L945-2true, Black: 180#(and (= |t1Thread1of1ForFork1_#t~ret41#1| 0) (= |t1Thread1of1ForFork1_push_#res#1| 0)), 190#true, 186#(<= 1 ~top~0), Black: 184#true, Black: 172#(= ~top~0 0)]) [2022-11-18 21:01:27,255 INFO L383 tUnfolder$Statistics]: this new event has 183 ancestors and is cut-off event [2022-11-18 21:01:27,258 INFO L386 tUnfolder$Statistics]: existing Event has 163 ancestors and is cut-off event [2022-11-18 21:01:27,259 INFO L386 tUnfolder$Statistics]: existing Event has 155 ancestors and is cut-off event [2022-11-18 21:01:27,259 INFO L386 tUnfolder$Statistics]: existing Event has 162 ancestors and is cut-off event [2022-11-18 21:01:27,259 INFO L381 tUnfolder$Statistics]: inserting event number 4 for the transition-marking pair ([461] L1008-->L1008-1: Formula: (not (< 0 v_~top~0_13)) InVars {~top~0=v_~top~0_13} OutVars{~top~0=v_~top~0_13} AuxVars[] AssignedVars[][179], [154#L1008-1true, 26#L1022-4true, Black: 177#(= |t1Thread1of1ForFork1_push_#res#1| 0), t2Thread1of1ForFork0InUse, 85#L945-2true, 255#(<= ~top~0 0), Black: 180#(and (= |t1Thread1of1ForFork1_#t~ret41#1| 0) (= |t1Thread1of1ForFork1_push_#res#1| 0)), 184#true, Black: 186#(<= 1 ~top~0), Black: 172#(= ~top~0 0)]) [2022-11-18 21:01:27,259 INFO L383 tUnfolder$Statistics]: this new event has 183 ancestors and is cut-off event [2022-11-18 21:01:27,260 INFO L386 tUnfolder$Statistics]: existing Event has 163 ancestors and is cut-off event [2022-11-18 21:01:27,261 INFO L386 tUnfolder$Statistics]: existing Event has 155 ancestors and is cut-off event [2022-11-18 21:01:27,261 INFO L386 tUnfolder$Statistics]: existing Event has 162 ancestors and is cut-off event [2022-11-18 21:01:27,401 INFO L130 PetriNetUnfolder]: 387/2731 cut-off events. [2022-11-18 21:01:27,407 INFO L131 PetriNetUnfolder]: For 972/1058 co-relation queries the response was YES. [2022-11-18 21:01:27,418 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4169 conditions, 2731 events. 387/2731 cut-off events. For 972/1058 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 19272 event pairs, 64 based on Foata normal form. 38/2620 useless extension candidates. Maximal degree in co-relation 3635. Up to 300 conditions per place. [2022-11-18 21:01:27,428 INFO L137 encePairwiseOnDemand]: 161/170 looper letters, 86 selfloop transitions, 46 changer transitions 1/267 dead transitions. [2022-11-18 21:01:27,428 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 267 transitions, 1066 flow [2022-11-18 21:01:27,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2022-11-18 21:01:27,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2022-11-18 21:01:27,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 2723 transitions. [2022-11-18 21:01:27,435 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8898692810457516 [2022-11-18 21:01:27,436 INFO L72 ComplementDD]: Start complementDD. Operand 18 states and 2723 transitions. [2022-11-18 21:01:27,436 INFO L73 IsDeterministic]: Start isDeterministic. Operand 18 states and 2723 transitions. [2022-11-18 21:01:27,438 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 21:01:27,438 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 18 states and 2723 transitions. [2022-11-18 21:01:27,445 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 19 states, 18 states have (on average 151.27777777777777) internal successors, (2723), 18 states have internal predecessors, (2723), 0 states have call successors, (0), 0 states 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 21:01:27,453 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 19 states, 19 states have (on average 170.0) internal successors, (3230), 19 states have internal predecessors, (3230), 0 states have call successors, (0), 0 states 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 21:01:27,454 INFO L81 ComplementDD]: Finished complementDD. Result has 19 states, 19 states have (on average 170.0) internal successors, (3230), 19 states have internal predecessors, (3230), 0 states have call successors, (0), 0 states 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 21:01:27,455 INFO L175 Difference]: Start difference. First operand has 158 places, 157 transitions, 384 flow. Second operand 18 states and 2723 transitions. [2022-11-18 21:01:27,455 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 267 transitions, 1066 flow [2022-11-18 21:01:27,464 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 267 transitions, 1004 flow, removed 6 selfloop flow, removed 2 redundant places. [2022-11-18 21:01:27,468 INFO L231 Difference]: Finished difference. Result has 179 places, 212 transitions, 755 flow [2022-11-18 21:01:27,469 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=156, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=157, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=755, PETRI_PLACES=179, PETRI_TRANSITIONS=212} [2022-11-18 21:01:27,470 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 24 predicate places. [2022-11-18 21:01:27,470 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 212 transitions, 755 flow [2022-11-18 21:01:27,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 146.5) internal successors, (1465), 10 states have internal predecessors, (1465), 0 states have call successors, (0), 0 states 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 21:01:27,471 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 21:01:27,472 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:01:27,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae1e281-a220-45f3-a1d9-cdb616d889fd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2022-11-18 21:01:27,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae1e281-a220-45f3-a1d9-cdb616d889fd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:01:27,678 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 21:01:27,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:01:27,679 INFO L85 PathProgramCache]: Analyzing trace with hash 1205336634, now seen corresponding path program 1 times [2022-11-18 21:01:27,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:01:27,679 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349573591] [2022-11-18 21:01:27,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:01:27,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:01:27,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:27,902 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 21:01:27,903 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:01:27,903 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349573591] [2022-11-18 21:01:27,903 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349573591] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:01:27,903 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:01:27,903 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2022-11-18 21:01:27,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438976627] [2022-11-18 21:01:27,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:01:27,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2022-11-18 21:01:27,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:01:27,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2022-11-18 21:01:27,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2022-11-18 21:01:27,906 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 148 out of 170 [2022-11-18 21:01:27,907 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 212 transitions, 755 flow. Second operand has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:27,907 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 21:01:27,907 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 148 of 170 [2022-11-18 21:01:27,907 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 21:01:28,143 INFO L130 PetriNetUnfolder]: 54/1105 cut-off events. [2022-11-18 21:01:28,143 INFO L131 PetriNetUnfolder]: For 239/239 co-relation queries the response was YES. [2022-11-18 21:01:28,147 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1514 conditions, 1105 events. 54/1105 cut-off events. For 239/239 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 4844 event pairs, 9 based on Foata normal form. 18/1080 useless extension candidates. Maximal degree in co-relation 1132. Up to 51 conditions per place. [2022-11-18 21:01:28,149 INFO L137 encePairwiseOnDemand]: 166/170 looper letters, 12 selfloop transitions, 4 changer transitions 0/171 dead transitions. [2022-11-18 21:01:28,149 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 171 transitions, 532 flow [2022-11-18 21:01:28,150 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2022-11-18 21:01:28,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2022-11-18 21:01:28,151 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 462 transitions. [2022-11-18 21:01:28,151 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.9058823529411765 [2022-11-18 21:01:28,152 INFO L72 ComplementDD]: Start complementDD. Operand 3 states and 462 transitions. [2022-11-18 21:01:28,152 INFO L73 IsDeterministic]: Start isDeterministic. Operand 3 states and 462 transitions. [2022-11-18 21:01:28,152 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 21:01:28,152 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 3 states and 462 transitions. [2022-11-18 21:01:28,153 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 4 states, 3 states have (on average 154.0) internal successors, (462), 3 states have internal predecessors, (462), 0 states have call successors, (0), 0 states 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 21:01:28,155 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 4 states, 4 states have (on average 170.0) internal successors, (680), 4 states have internal predecessors, (680), 0 states have call successors, (0), 0 states 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 21:01:28,155 INFO L81 ComplementDD]: Finished complementDD. Result has 4 states, 4 states have (on average 170.0) internal successors, (680), 4 states have internal predecessors, (680), 0 states have call successors, (0), 0 states 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 21:01:28,155 INFO L175 Difference]: Start difference. First operand has 179 places, 212 transitions, 755 flow. Second operand 3 states and 462 transitions. [2022-11-18 21:01:28,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 171 transitions, 532 flow [2022-11-18 21:01:28,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 169 places, 171 transitions, 510 flow, removed 9 selfloop flow, removed 4 redundant places. [2022-11-18 21:01:28,161 INFO L231 Difference]: Finished difference. Result has 169 places, 169 transitions, 479 flow [2022-11-18 21:01:28,162 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=471, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=165, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=479, PETRI_PLACES=169, PETRI_TRANSITIONS=169} [2022-11-18 21:01:28,165 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 14 predicate places. [2022-11-18 21:01:28,165 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 169 transitions, 479 flow [2022-11-18 21:01:28,166 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 151.66666666666666) internal successors, (455), 3 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:01:28,166 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 21:01:28,166 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:01:28,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2022-11-18 21:01:28,167 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 21:01:28,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:01:28,168 INFO L85 PathProgramCache]: Analyzing trace with hash -1077512720, now seen corresponding path program 1 times [2022-11-18 21:01:28,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:01:28,168 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301636020] [2022-11-18 21:01:28,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:01:28,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:01:28,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:30,172 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 21:01:30,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:01:30,173 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301636020] [2022-11-18 21:01:30,173 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1301636020] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:01:30,173 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:01:30,173 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-11-18 21:01:30,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741619073] [2022-11-18 21:01:30,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:01:30,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-18 21:01:30,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:01:30,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-18 21:01:30,175 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=517, Unknown=0, NotChecked=0, Total=600 [2022-11-18 21:01:30,178 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 170 [2022-11-18 21:01:30,183 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 169 transitions, 479 flow. Second operand has 25 states, 25 states have (on average 97.28) internal successors, (2432), 25 states have internal predecessors, (2432), 0 states have call successors, (0), 0 states 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 21:01:30,183 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 21:01:30,183 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 170 [2022-11-18 21:01:30,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 21:01:33,444 INFO L130 PetriNetUnfolder]: 1109/4445 cut-off events. [2022-11-18 21:01:33,445 INFO L131 PetriNetUnfolder]: For 787/787 co-relation queries the response was YES. [2022-11-18 21:01:33,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8358 conditions, 4445 events. 1109/4445 cut-off events. For 787/787 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 33056 event pairs, 157 based on Foata normal form. 0/4293 useless extension candidates. Maximal degree in co-relation 4747. Up to 1370 conditions per place. [2022-11-18 21:01:33,475 INFO L137 encePairwiseOnDemand]: 136/170 looper letters, 293 selfloop transitions, 51 changer transitions 11/439 dead transitions. [2022-11-18 21:01:33,476 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 202 places, 439 transitions, 1915 flow [2022-11-18 21:01:33,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2022-11-18 21:01:33,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2022-11-18 21:01:33,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 3554 transitions. [2022-11-18 21:01:33,529 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.614878892733564 [2022-11-18 21:01:33,529 INFO L72 ComplementDD]: Start complementDD. Operand 34 states and 3554 transitions. [2022-11-18 21:01:33,529 INFO L73 IsDeterministic]: Start isDeterministic. Operand 34 states and 3554 transitions. [2022-11-18 21:01:33,531 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 21:01:33,531 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 34 states and 3554 transitions. [2022-11-18 21:01:33,543 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 35 states, 34 states have (on average 104.52941176470588) internal successors, (3554), 34 states have internal predecessors, (3554), 0 states have call successors, (0), 0 states 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 21:01:33,552 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 35 states, 35 states have (on average 170.0) internal successors, (5950), 35 states have internal predecessors, (5950), 0 states have call successors, (0), 0 states 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 21:01:33,555 INFO L81 ComplementDD]: Finished complementDD. Result has 35 states, 35 states have (on average 170.0) internal successors, (5950), 35 states have internal predecessors, (5950), 0 states have call successors, (0), 0 states 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 21:01:33,555 INFO L175 Difference]: Start difference. First operand has 169 places, 169 transitions, 479 flow. Second operand 34 states and 3554 transitions. [2022-11-18 21:01:33,555 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 202 places, 439 transitions, 1915 flow [2022-11-18 21:01:33,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 201 places, 439 transitions, 1911 flow, removed 0 selfloop flow, removed 1 redundant places. [2022-11-18 21:01:33,565 INFO L231 Difference]: Finished difference. Result has 228 places, 215 transitions, 861 flow [2022-11-18 21:01:33,566 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=475, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=169, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=861, PETRI_PLACES=228, PETRI_TRANSITIONS=215} [2022-11-18 21:01:33,567 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 73 predicate places. [2022-11-18 21:01:33,567 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 215 transitions, 861 flow [2022-11-18 21:01:33,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 97.28) internal successors, (2432), 25 states have internal predecessors, (2432), 0 states have call successors, (0), 0 states 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 21:01:33,568 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 21:01:33,568 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:01:33,569 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2022-11-18 21:01:33,569 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 21:01:33,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:01:33,570 INFO L85 PathProgramCache]: Analyzing trace with hash 1423261228, now seen corresponding path program 2 times [2022-11-18 21:01:33,570 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:01:33,570 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528175960] [2022-11-18 21:01:33,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:01:33,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:01:33,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:35,857 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 21:01:35,858 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:01:35,858 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528175960] [2022-11-18 21:01:35,858 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528175960] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:01:35,858 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:01:35,858 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [29] imperfect sequences [] total 29 [2022-11-18 21:01:35,858 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768102497] [2022-11-18 21:01:35,858 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:01:35,859 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2022-11-18 21:01:35,859 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:01:35,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2022-11-18 21:01:35,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=728, Unknown=0, NotChecked=0, Total=812 [2022-11-18 21:01:35,863 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 170 [2022-11-18 21:01:35,865 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 215 transitions, 861 flow. Second operand has 29 states, 29 states have (on average 85.24137931034483) internal successors, (2472), 29 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states 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 21:01:35,865 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 21:01:35,865 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 170 [2022-11-18 21:01:35,865 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 21:01:40,922 INFO L130 PetriNetUnfolder]: 1483/6021 cut-off events. [2022-11-18 21:01:40,922 INFO L131 PetriNetUnfolder]: For 3132/3132 co-relation queries the response was YES. [2022-11-18 21:01:40,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13124 conditions, 6021 events. 1483/6021 cut-off events. For 3132/3132 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 48920 event pairs, 283 based on Foata normal form. 4/5911 useless extension candidates. Maximal degree in co-relation 7912. Up to 1396 conditions per place. [2022-11-18 21:01:40,982 INFO L137 encePairwiseOnDemand]: 133/170 looper letters, 301 selfloop transitions, 78 changer transitions 11/466 dead transitions. [2022-11-18 21:01:40,982 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 466 transitions, 2584 flow [2022-11-18 21:01:40,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2022-11-18 21:01:40,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2022-11-18 21:01:40,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 3399 transitions. [2022-11-18 21:01:40,998 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5403815580286169 [2022-11-18 21:01:40,998 INFO L72 ComplementDD]: Start complementDD. Operand 37 states and 3399 transitions. [2022-11-18 21:01:40,998 INFO L73 IsDeterministic]: Start isDeterministic. Operand 37 states and 3399 transitions. [2022-11-18 21:01:41,000 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 21:01:41,000 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 37 states and 3399 transitions. [2022-11-18 21:01:41,007 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 38 states, 37 states have (on average 91.86486486486487) internal successors, (3399), 37 states have internal predecessors, (3399), 0 states have call successors, (0), 0 states 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 21:01:41,017 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 38 states, 38 states have (on average 170.0) internal successors, (6460), 38 states have internal predecessors, (6460), 0 states have call successors, (0), 0 states 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 21:01:41,019 INFO L81 ComplementDD]: Finished complementDD. Result has 38 states, 38 states have (on average 170.0) internal successors, (6460), 38 states have internal predecessors, (6460), 0 states have call successors, (0), 0 states 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 21:01:41,020 INFO L175 Difference]: Start difference. First operand has 228 places, 215 transitions, 861 flow. Second operand 37 states and 3399 transitions. [2022-11-18 21:01:41,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 466 transitions, 2584 flow [2022-11-18 21:01:41,034 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 262 places, 466 transitions, 2581 flow, removed 0 selfloop flow, removed 2 redundant places. [2022-11-18 21:01:41,039 INFO L231 Difference]: Finished difference. Result has 277 places, 242 transitions, 1291 flow [2022-11-18 21:01:41,040 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=858, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=146, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=1291, PETRI_PLACES=277, PETRI_TRANSITIONS=242} [2022-11-18 21:01:41,040 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 122 predicate places. [2022-11-18 21:01:41,040 INFO L495 AbstractCegarLoop]: Abstraction has has 277 places, 242 transitions, 1291 flow [2022-11-18 21:01:41,042 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 85.24137931034483) internal successors, (2472), 29 states have internal predecessors, (2472), 0 states have call successors, (0), 0 states 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 21:01:41,042 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 21:01:41,042 INFO L209 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:01:41,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2022-11-18 21:01:41,042 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 21:01:41,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:01:41,043 INFO L85 PathProgramCache]: Analyzing trace with hash -820719294, now seen corresponding path program 3 times [2022-11-18 21:01:41,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:01:41,043 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [736031442] [2022-11-18 21:01:41,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:01:41,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:01:41,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:43,430 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 21:01:43,431 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:01:43,431 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [736031442] [2022-11-18 21:01:43,431 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [736031442] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:01:43,431 INFO L184 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2022-11-18 21:01:43,432 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [25] imperfect sequences [] total 25 [2022-11-18 21:01:43,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514321407] [2022-11-18 21:01:43,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:01:43,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2022-11-18 21:01:43,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:01:43,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2022-11-18 21:01:43,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2022-11-18 21:01:43,437 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 88 out of 170 [2022-11-18 21:01:43,440 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 277 places, 242 transitions, 1291 flow. Second operand has 25 states, 25 states have (on average 90.4) internal successors, (2260), 25 states have internal predecessors, (2260), 0 states have call successors, (0), 0 states 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 21:01:43,440 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 21:01:43,440 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 88 of 170 [2022-11-18 21:01:43,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 21:01:48,375 INFO L130 PetriNetUnfolder]: 1792/7592 cut-off events. [2022-11-18 21:01:48,375 INFO L131 PetriNetUnfolder]: For 5825/5827 co-relation queries the response was YES. [2022-11-18 21:01:48,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17320 conditions, 7592 events. 1792/7592 cut-off events. For 5825/5827 co-relation queries the response was YES. Maximal size of possible extension queue 106. Compared 65976 event pairs, 305 based on Foata normal form. 8/7447 useless extension candidates. Maximal degree in co-relation 9470. Up to 1271 conditions per place. [2022-11-18 21:01:48,476 INFO L137 encePairwiseOnDemand]: 145/170 looper letters, 247 selfloop transitions, 56 changer transitions 14/405 dead transitions. [2022-11-18 21:01:48,477 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 405 transitions, 2688 flow [2022-11-18 21:01:48,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2022-11-18 21:01:48,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2022-11-18 21:01:48,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 2338 transitions. [2022-11-18 21:01:48,484 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5730392156862745 [2022-11-18 21:01:48,484 INFO L72 ComplementDD]: Start complementDD. Operand 24 states and 2338 transitions. [2022-11-18 21:01:48,484 INFO L73 IsDeterministic]: Start isDeterministic. Operand 24 states and 2338 transitions. [2022-11-18 21:01:48,486 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 21:01:48,486 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 24 states and 2338 transitions. [2022-11-18 21:01:48,492 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 25 states, 24 states have (on average 97.41666666666667) internal successors, (2338), 24 states have internal predecessors, (2338), 0 states have call successors, (0), 0 states 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 21:01:48,519 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 25 states, 25 states have (on average 170.0) internal successors, (4250), 25 states have internal predecessors, (4250), 0 states have call successors, (0), 0 states 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 21:01:48,529 INFO L81 ComplementDD]: Finished complementDD. Result has 25 states, 25 states have (on average 170.0) internal successors, (4250), 25 states have internal predecessors, (4250), 0 states have call successors, (0), 0 states 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 21:01:48,529 INFO L175 Difference]: Start difference. First operand has 277 places, 242 transitions, 1291 flow. Second operand 24 states and 2338 transitions. [2022-11-18 21:01:48,530 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 405 transitions, 2688 flow [2022-11-18 21:01:48,556 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 405 transitions, 2607 flow, removed 27 selfloop flow, removed 13 redundant places. [2022-11-18 21:01:48,562 INFO L231 Difference]: Finished difference. Result has 295 places, 256 transitions, 1535 flow [2022-11-18 21:01:48,563 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=1234, PETRI_DIFFERENCE_MINUEND_PLACES=264, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=242, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1535, PETRI_PLACES=295, PETRI_TRANSITIONS=256} [2022-11-18 21:01:48,565 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 140 predicate places. [2022-11-18 21:01:48,565 INFO L495 AbstractCegarLoop]: Abstraction has has 295 places, 256 transitions, 1535 flow [2022-11-18 21:01:48,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 90.4) internal successors, (2260), 25 states have internal predecessors, (2260), 0 states have call successors, (0), 0 states 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 21:01:48,566 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 21:01:48,566 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 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 21:01:48,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2022-11-18 21:01:48,567 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 21:01:48,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:01:48,567 INFO L85 PathProgramCache]: Analyzing trace with hash -179739788, now seen corresponding path program 1 times [2022-11-18 21:01:48,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:01:48,568 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952849755] [2022-11-18 21:01:48,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:01:48,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:01:48,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:48,738 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:01:48,738 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:01:48,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952849755] [2022-11-18 21:01:48,738 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952849755] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:01:48,738 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268622828] [2022-11-18 21:01:48,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:01:48,739 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:01:48,739 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae1e281-a220-45f3-a1d9-cdb616d889fd/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:01:48,741 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae1e281-a220-45f3-a1d9-cdb616d889fd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:01:48,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae1e281-a220-45f3-a1d9-cdb616d889fd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2022-11-18 21:01:48,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:48,880 INFO L263 TraceCheckSpWp]: Trace formula consists of 322 conjuncts, 6 conjunts are in the unsatisfiable core [2022-11-18 21:01:48,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:01:49,100 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2022-11-18 21:01:49,101 INFO L324 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2022-11-18 21:01:49,101 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268622828] provided 1 perfect and 0 imperfect interpolant sequences [2022-11-18 21:01:49,101 INFO L184 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2022-11-18 21:01:49,101 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [7] total 8 [2022-11-18 21:01:49,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813262849] [2022-11-18 21:01:49,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:01:49,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2022-11-18 21:01:49,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:01:49,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2022-11-18 21:01:49,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2022-11-18 21:01:49,103 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 170 [2022-11-18 21:01:49,104 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 295 places, 256 transitions, 1535 flow. Second operand has 6 states, 6 states have (on average 144.83333333333334) internal successors, (869), 6 states have internal predecessors, (869), 0 states have call successors, (0), 0 states 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 21:01:49,104 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 21:01:49,105 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 170 [2022-11-18 21:01:49,105 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 21:01:50,196 INFO L130 PetriNetUnfolder]: 248/3339 cut-off events. [2022-11-18 21:01:50,196 INFO L131 PetriNetUnfolder]: For 3017/3018 co-relation queries the response was YES. [2022-11-18 21:01:50,219 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6759 conditions, 3339 events. 248/3339 cut-off events. For 3017/3018 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 24253 event pairs, 65 based on Foata normal form. 12/3280 useless extension candidates. Maximal degree in co-relation 4883. Up to 261 conditions per place. [2022-11-18 21:01:50,226 INFO L137 encePairwiseOnDemand]: 160/170 looper letters, 52 selfloop transitions, 40 changer transitions 0/280 dead transitions. [2022-11-18 21:01:50,227 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 302 places, 280 transitions, 1797 flow [2022-11-18 21:01:50,229 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2022-11-18 21:01:50,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2022-11-18 21:01:50,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 1186 transitions. [2022-11-18 21:01:50,240 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8720588235294118 [2022-11-18 21:01:50,240 INFO L72 ComplementDD]: Start complementDD. Operand 8 states and 1186 transitions. [2022-11-18 21:01:50,240 INFO L73 IsDeterministic]: Start isDeterministic. Operand 8 states and 1186 transitions. [2022-11-18 21:01:50,243 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 21:01:50,245 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 8 states and 1186 transitions. [2022-11-18 21:01:50,248 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 9 states, 8 states have (on average 148.25) internal successors, (1186), 8 states have internal predecessors, (1186), 0 states have call successors, (0), 0 states 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 21:01:50,253 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 9 states, 9 states have (on average 170.0) internal successors, (1530), 9 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states 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 21:01:50,257 INFO L81 ComplementDD]: Finished complementDD. Result has 9 states, 9 states have (on average 170.0) internal successors, (1530), 9 states have internal predecessors, (1530), 0 states have call successors, (0), 0 states 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 21:01:50,257 INFO L175 Difference]: Start difference. First operand has 295 places, 256 transitions, 1535 flow. Second operand 8 states and 1186 transitions. [2022-11-18 21:01:50,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 302 places, 280 transitions, 1797 flow [2022-11-18 21:01:50,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 287 places, 280 transitions, 1716 flow, removed 22 selfloop flow, removed 15 redundant places. [2022-11-18 21:01:50,297 INFO L231 Difference]: Finished difference. Result has 292 places, 261 transitions, 1631 flow [2022-11-18 21:01:50,298 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=1383, PETRI_DIFFERENCE_MINUEND_PLACES=280, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=214, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1631, PETRI_PLACES=292, PETRI_TRANSITIONS=261} [2022-11-18 21:01:50,299 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 137 predicate places. [2022-11-18 21:01:50,299 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 261 transitions, 1631 flow [2022-11-18 21:01:50,302 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 144.83333333333334) internal successors, (869), 6 states have internal predecessors, (869), 0 states have call successors, (0), 0 states 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 21:01:50,302 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 21:01:50,303 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:01:50,314 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae1e281-a220-45f3-a1d9-cdb616d889fd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2022-11-18 21:01:50,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae1e281-a220-45f3-a1d9-cdb616d889fd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2022-11-18 21:01:50,508 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 21:01:50,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:01:50,509 INFO L85 PathProgramCache]: Analyzing trace with hash -1352216211, now seen corresponding path program 1 times [2022-11-18 21:01:50,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:01:50,509 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063325153] [2022-11-18 21:01:50,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:01:50,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:01:50,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:51,960 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 29 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-18 21:01:51,961 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:01:51,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063325153] [2022-11-18 21:01:51,961 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063325153] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:01:51,961 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601636862] [2022-11-18 21:01:51,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:01:51,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:01:51,961 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae1e281-a220-45f3-a1d9-cdb616d889fd/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:01:51,962 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae1e281-a220-45f3-a1d9-cdb616d889fd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:01:51,982 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae1e281-a220-45f3-a1d9-cdb616d889fd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2022-11-18 21:01:52,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:01:52,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 342 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-18 21:01:52,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:01:53,643 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-11-18 21:01:55,019 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 21 [2022-11-18 21:01:55,276 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 0 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:01:55,276 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:01:56,053 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2022-11-18 21:01:56,747 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 32 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-18 21:01:56,748 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601636862] provided 1 perfect and 1 imperfect interpolant sequences [2022-11-18 21:01:56,748 INFO L184 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2022-11-18 21:01:56,748 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [22] imperfect sequences [23, 26] total 66 [2022-11-18 21:01:56,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588180181] [2022-11-18 21:01:56,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2022-11-18 21:01:56,749 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2022-11-18 21:01:56,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:01:56,750 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2022-11-18 21:01:56,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=254, Invalid=4036, Unknown=0, NotChecked=0, Total=4290 [2022-11-18 21:01:56,754 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 170 [2022-11-18 21:01:56,756 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 261 transitions, 1631 flow. Second operand has 22 states, 22 states have (on average 98.45454545454545) internal successors, (2166), 22 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states 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 21:01:56,756 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 21:01:56,756 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 170 [2022-11-18 21:01:56,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 21:02:06,363 INFO L130 PetriNetUnfolder]: 2639/10767 cut-off events. [2022-11-18 21:02:06,363 INFO L131 PetriNetUnfolder]: For 10512/10515 co-relation queries the response was YES. [2022-11-18 21:02:06,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25104 conditions, 10767 events. 2639/10767 cut-off events. For 10512/10515 co-relation queries the response was YES. Maximal size of possible extension queue 131. Compared 98990 event pairs, 407 based on Foata normal form. 13/10554 useless extension candidates. Maximal degree in co-relation 22611. Up to 1446 conditions per place. [2022-11-18 21:02:06,491 INFO L137 encePairwiseOnDemand]: 134/170 looper letters, 287 selfloop transitions, 196 changer transitions 3/570 dead transitions. [2022-11-18 21:02:06,491 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 358 places, 570 transitions, 4145 flow [2022-11-18 21:02:06,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2022-11-18 21:02:06,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2022-11-18 21:02:06,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 6690 transitions. [2022-11-18 21:02:06,510 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5873573309920983 [2022-11-18 21:02:06,510 INFO L72 ComplementDD]: Start complementDD. Operand 67 states and 6690 transitions. [2022-11-18 21:02:06,511 INFO L73 IsDeterministic]: Start isDeterministic. Operand 67 states and 6690 transitions. [2022-11-18 21:02:06,516 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 21:02:06,516 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 67 states and 6690 transitions. [2022-11-18 21:02:06,536 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 68 states, 67 states have (on average 99.85074626865672) internal successors, (6690), 67 states have internal predecessors, (6690), 0 states have call successors, (0), 0 states 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 21:02:06,560 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 68 states, 68 states have (on average 170.0) internal successors, (11560), 68 states have internal predecessors, (11560), 0 states have call successors, (0), 0 states 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 21:02:06,564 INFO L81 ComplementDD]: Finished complementDD. Result has 68 states, 68 states have (on average 170.0) internal successors, (11560), 68 states have internal predecessors, (11560), 0 states have call successors, (0), 0 states 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 21:02:06,564 INFO L175 Difference]: Start difference. First operand has 292 places, 261 transitions, 1631 flow. Second operand 67 states and 6690 transitions. [2022-11-18 21:02:06,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 358 places, 570 transitions, 4145 flow [2022-11-18 21:02:06,622 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 358 places, 570 transitions, 4085 flow, removed 30 selfloop flow, removed 0 redundant places. [2022-11-18 21:02:06,631 INFO L231 Difference]: Finished difference. Result has 375 places, 389 transitions, 3063 flow [2022-11-18 21:02:06,632 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=1611, PETRI_DIFFERENCE_MINUEND_PLACES=292, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=261, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=84, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=158, PETRI_DIFFERENCE_SUBTRAHEND_STATES=67, PETRI_FLOW=3063, PETRI_PLACES=375, PETRI_TRANSITIONS=389} [2022-11-18 21:02:06,632 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 220 predicate places. [2022-11-18 21:02:06,632 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 389 transitions, 3063 flow [2022-11-18 21:02:06,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 98.45454545454545) internal successors, (2166), 22 states have internal predecessors, (2166), 0 states have call successors, (0), 0 states 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 21:02:06,634 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 21:02:06,634 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:02:06,646 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae1e281-a220-45f3-a1d9-cdb616d889fd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2022-11-18 21:02:06,840 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae1e281-a220-45f3-a1d9-cdb616d889fd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:02:06,840 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 21:02:06,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:02:06,841 INFO L85 PathProgramCache]: Analyzing trace with hash 1453242275, now seen corresponding path program 2 times [2022-11-18 21:02:06,841 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:02:06,841 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385701374] [2022-11-18 21:02:06,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:02:06,841 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:02:06,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:09,021 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-18 21:02:09,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:02:09,021 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385701374] [2022-11-18 21:02:09,022 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385701374] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:02:09,022 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715634951] [2022-11-18 21:02:09,022 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:02:09,022 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:02:09,022 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae1e281-a220-45f3-a1d9-cdb616d889fd/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:02:09,032 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae1e281-a220-45f3-a1d9-cdb616d889fd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:02:09,040 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae1e281-a220-45f3-a1d9-cdb616d889fd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2022-11-18 21:02:09,162 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2022-11-18 21:02:09,163 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:02:09,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 63 conjunts are in the unsatisfiable core [2022-11-18 21:02:09,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:02:09,301 INFO L321 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2022-11-18 21:02:09,302 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2022-11-18 21:02:09,317 INFO L321 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2022-11-18 21:02:09,318 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2022-11-18 21:02:10,365 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-11-18 21:02:10,531 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 56 treesize of output 52 [2022-11-18 21:02:11,621 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 21 [2022-11-18 21:02:11,894 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 18 proven. 14 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-18 21:02:11,895 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:02:12,917 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 21:02:12,918 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 30 [2022-11-18 21:02:12,937 INFO L321 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2022-11-18 21:02:12,937 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 49 treesize of output 52 [2022-11-18 21:02:12,943 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 28 treesize of output 22 [2022-11-18 21:02:14,249 INFO L321 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2022-11-18 21:02:14,250 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 12 [2022-11-18 21:02:14,256 INFO L134 CoverageAnalysis]: Checked inductivity of 39 backedges. 15 proven. 17 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2022-11-18 21:02:14,256 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715634951] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:02:14,257 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:02:14,257 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 73 [2022-11-18 21:02:14,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175253811] [2022-11-18 21:02:14,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:02:14,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2022-11-18 21:02:14,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:02:14,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2022-11-18 21:02:14,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=4972, Unknown=12, NotChecked=0, Total=5256 [2022-11-18 21:02:14,266 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 83 out of 170 [2022-11-18 21:02:14,271 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 389 transitions, 3063 flow. Second operand has 73 states, 73 states have (on average 86.27397260273973) internal successors, (6298), 73 states have internal predecessors, (6298), 0 states have call successors, (0), 0 states 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 21:02:14,271 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 21:02:14,272 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 83 of 170 [2022-11-18 21:02:14,272 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 21:02:41,231 INFO L130 PetriNetUnfolder]: 3128/12678 cut-off events. [2022-11-18 21:02:41,231 INFO L131 PetriNetUnfolder]: For 15369/15369 co-relation queries the response was YES. [2022-11-18 21:02:41,338 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32897 conditions, 12678 events. 3128/12678 cut-off events. For 15369/15369 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 121429 event pairs, 143 based on Foata normal form. 8/12446 useless extension candidates. Maximal degree in co-relation 29986. Up to 1715 conditions per place. [2022-11-18 21:02:41,373 INFO L137 encePairwiseOnDemand]: 131/170 looper letters, 291 selfloop transitions, 275 changer transitions 3/645 dead transitions. [2022-11-18 21:02:41,373 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 445 places, 645 transitions, 5399 flow [2022-11-18 21:02:41,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2022-11-18 21:02:41,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2022-11-18 21:02:41,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 6224 transitions. [2022-11-18 21:02:41,393 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.515658657829329 [2022-11-18 21:02:41,394 INFO L72 ComplementDD]: Start complementDD. Operand 71 states and 6224 transitions. [2022-11-18 21:02:41,394 INFO L73 IsDeterministic]: Start isDeterministic. Operand 71 states and 6224 transitions. [2022-11-18 21:02:41,398 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 21:02:41,398 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 71 states and 6224 transitions. [2022-11-18 21:02:41,413 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 72 states, 71 states have (on average 87.66197183098592) internal successors, (6224), 71 states have internal predecessors, (6224), 0 states have call successors, (0), 0 states 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 21:02:41,435 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 72 states, 72 states have (on average 170.0) internal successors, (12240), 72 states have internal predecessors, (12240), 0 states have call successors, (0), 0 states 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 21:02:41,439 INFO L81 ComplementDD]: Finished complementDD. Result has 72 states, 72 states have (on average 170.0) internal successors, (12240), 72 states have internal predecessors, (12240), 0 states have call successors, (0), 0 states 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 21:02:41,439 INFO L175 Difference]: Start difference. First operand has 375 places, 389 transitions, 3063 flow. Second operand 71 states and 6224 transitions. [2022-11-18 21:02:41,440 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 445 places, 645 transitions, 5399 flow [2022-11-18 21:02:41,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 433 places, 645 transitions, 5001 flow, removed 166 selfloop flow, removed 12 redundant places. [2022-11-18 21:02:41,622 INFO L231 Difference]: Finished difference. Result has 448 places, 467 transitions, 4039 flow [2022-11-18 21:02:41,623 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=2721, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=389, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=200, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=175, PETRI_DIFFERENCE_SUBTRAHEND_STATES=71, PETRI_FLOW=4039, PETRI_PLACES=448, PETRI_TRANSITIONS=467} [2022-11-18 21:02:41,624 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 293 predicate places. [2022-11-18 21:02:41,625 INFO L495 AbstractCegarLoop]: Abstraction has has 448 places, 467 transitions, 4039 flow [2022-11-18 21:02:41,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 86.27397260273973) internal successors, (6298), 73 states have internal predecessors, (6298), 0 states have call successors, (0), 0 states 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 21:02:41,627 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 21:02:41,627 INFO L209 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:02:41,633 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae1e281-a220-45f3-a1d9-cdb616d889fd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2022-11-18 21:02:41,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae1e281-a220-45f3-a1d9-cdb616d889fd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:02:41,833 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting t1Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 21:02:41,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:02:41,834 INFO L85 PathProgramCache]: Analyzing trace with hash 1972381461, now seen corresponding path program 2 times [2022-11-18 21:02:41,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:02:41,834 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852385654] [2022-11-18 21:02:41,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:02:41,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:02:41,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:42,058 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-18 21:02:42,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:02:42,058 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852385654] [2022-11-18 21:02:42,059 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1852385654] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:02:42,059 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [805532432] [2022-11-18 21:02:42,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:02:42,059 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:02:42,059 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae1e281-a220-45f3-a1d9-cdb616d889fd/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:02:42,060 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae1e281-a220-45f3-a1d9-cdb616d889fd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:02:42,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae1e281-a220-45f3-a1d9-cdb616d889fd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2022-11-18 21:02:42,215 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:02:42,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:02:42,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 399 conjuncts, 8 conjunts are in the unsatisfiable core [2022-11-18 21:02:42,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:02:42,463 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-18 21:02:42,463 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:02:42,737 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 8 proven. 57 refuted. 0 times theorem prover too weak. 21 trivial. 0 not checked. [2022-11-18 21:02:42,737 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [805532432] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:02:42,737 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:02:42,738 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2022-11-18 21:02:42,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530113299] [2022-11-18 21:02:42,738 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:02:42,739 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2022-11-18 21:02:42,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:02:42,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2022-11-18 21:02:42,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2022-11-18 21:02:42,741 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 142 out of 170 [2022-11-18 21:02:42,743 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 448 places, 467 transitions, 4039 flow. Second operand has 16 states, 16 states have (on average 145.375) internal successors, (2326), 16 states have internal predecessors, (2326), 0 states have call successors, (0), 0 states 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 21:02:42,743 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 21:02:42,743 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 142 of 170 [2022-11-18 21:02:42,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 21:02:45,131 INFO L130 PetriNetUnfolder]: 568/6648 cut-off events. [2022-11-18 21:02:45,131 INFO L131 PetriNetUnfolder]: For 10952/10955 co-relation queries the response was YES. [2022-11-18 21:02:45,181 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16795 conditions, 6648 events. 568/6648 cut-off events. For 10952/10955 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 56920 event pairs, 131 based on Foata normal form. 20/6488 useless extension candidates. Maximal degree in co-relation 15363. Up to 244 conditions per place. [2022-11-18 21:02:45,195 INFO L137 encePairwiseOnDemand]: 160/170 looper letters, 94 selfloop transitions, 153 changer transitions 1/562 dead transitions. [2022-11-18 21:02:45,196 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 562 transitions, 5260 flow [2022-11-18 21:02:45,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2022-11-18 21:02:45,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2022-11-18 21:02:45,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 3214 transitions. [2022-11-18 21:02:45,200 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.8593582887700535 [2022-11-18 21:02:45,200 INFO L72 ComplementDD]: Start complementDD. Operand 22 states and 3214 transitions. [2022-11-18 21:02:45,201 INFO L73 IsDeterministic]: Start isDeterministic. Operand 22 states and 3214 transitions. [2022-11-18 21:02:45,202 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 21:02:45,202 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 22 states and 3214 transitions. [2022-11-18 21:02:45,207 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 23 states, 22 states have (on average 146.0909090909091) internal successors, (3214), 22 states have internal predecessors, (3214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2022-11-18 21:02:45,212 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 23 states, 23 states have (on average 170.0) internal successors, (3910), 23 states have internal predecessors, (3910), 0 states have call successors, (0), 0 states 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 21:02:45,213 INFO L81 ComplementDD]: Finished complementDD. Result has 23 states, 23 states have (on average 170.0) internal successors, (3910), 23 states have internal predecessors, (3910), 0 states have call successors, (0), 0 states 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 21:02:45,213 INFO L175 Difference]: Start difference. First operand has 448 places, 467 transitions, 4039 flow. Second operand 22 states and 3214 transitions. [2022-11-18 21:02:45,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 562 transitions, 5260 flow [2022-11-18 21:02:45,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 562 transitions, 4896 flow, removed 77 selfloop flow, removed 16 redundant places. [2022-11-18 21:02:45,334 INFO L231 Difference]: Finished difference. Result has 458 places, 501 transitions, 4508 flow [2022-11-18 21:02:45,335 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=3708, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=464, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=345, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=4508, PETRI_PLACES=458, PETRI_TRANSITIONS=501} [2022-11-18 21:02:45,335 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 303 predicate places. [2022-11-18 21:02:45,335 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 501 transitions, 4508 flow [2022-11-18 21:02:45,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 145.375) internal successors, (2326), 16 states have internal predecessors, (2326), 0 states have call successors, (0), 0 states 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 21:02:45,336 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 21:02:45,337 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:02:45,349 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae1e281-a220-45f3-a1d9-cdb616d889fd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2022-11-18 21:02:45,542 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae1e281-a220-45f3-a1d9-cdb616d889fd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2022-11-18 21:02:45,542 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 21:02:45,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:02:45,543 INFO L85 PathProgramCache]: Analyzing trace with hash 443849610, now seen corresponding path program 1 times [2022-11-18 21:02:45,543 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:02:45,543 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [237015499] [2022-11-18 21:02:45,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:02:45,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:02:45,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:49,017 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:02:49,017 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:02:49,017 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [237015499] [2022-11-18 21:02:49,017 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [237015499] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:02:49,018 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893776154] [2022-11-18 21:02:49,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:02:49,018 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:02:49,018 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae1e281-a220-45f3-a1d9-cdb616d889fd/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:02:49,019 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae1e281-a220-45f3-a1d9-cdb616d889fd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:02:49,048 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae1e281-a220-45f3-a1d9-cdb616d889fd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2022-11-18 21:02:49,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:02:49,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 86 conjunts are in the unsatisfiable core [2022-11-18 21:02:49,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:02:50,300 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-11-18 21:02:51,623 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:02:51,624 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 49 treesize of output 36 [2022-11-18 21:02:53,968 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 41 treesize of output 21 [2022-11-18 21:02:54,205 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 6 proven. 63 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:02:54,205 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:02:59,572 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 57 treesize of output 48 [2022-11-18 21:03:00,867 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 0 proven. 69 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:03:00,868 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893776154] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:03:00,868 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:03:00,868 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 34, 32] total 97 [2022-11-18 21:03:00,868 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438310497] [2022-11-18 21:03:00,868 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:03:00,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 97 states [2022-11-18 21:03:00,869 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:03:00,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 97 interpolants. [2022-11-18 21:03:00,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=793, Invalid=8518, Unknown=1, NotChecked=0, Total=9312 [2022-11-18 21:03:00,881 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 170 [2022-11-18 21:03:00,889 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 501 transitions, 4508 flow. Second operand has 97 states, 97 states have (on average 98.0) internal successors, (9506), 97 states have internal predecessors, (9506), 0 states have call successors, (0), 0 states 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 21:03:00,889 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 21:03:00,889 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 170 [2022-11-18 21:03:00,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2022-11-18 21:05:20,779 WARN L233 SmtUtils]: Spent 5.38s on a formula simplification that was a NOOP. DAG size: 79 (called from [L 361] de.uni_freiburg.informatik.ultimate.lib.modelcheckerutils.smt.predicates.PredicateUnifier.getOrConstructPredicate) [2022-11-18 21:05:23,115 INFO L130 PetriNetUnfolder]: 9475/39319 cut-off events. [2022-11-18 21:05:23,115 INFO L131 PetriNetUnfolder]: For 70565/70574 co-relation queries the response was YES. [2022-11-18 21:05:23,722 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110724 conditions, 39319 events. 9475/39319 cut-off events. For 70565/70574 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 422245 event pairs, 1237 based on Foata normal form. 92/38669 useless extension candidates. Maximal degree in co-relation 103050. Up to 6053 conditions per place. [2022-11-18 21:05:23,796 INFO L137 encePairwiseOnDemand]: 127/170 looper letters, 2054 selfloop transitions, 1189 changer transitions 366/3693 dead transitions. [2022-11-18 21:05:23,796 INFO L142 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 934 places, 3693 transitions, 32882 flow [2022-11-18 21:05:23,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 477 states. [2022-11-18 21:05:23,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 477 states. [2022-11-18 21:05:23,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 477 states to 477 states and 47612 transitions. [2022-11-18 21:05:23,853 INFO L523 CegarLoopForPetriNet]: DFA transition density 0.5871500801578493 [2022-11-18 21:05:23,854 INFO L72 ComplementDD]: Start complementDD. Operand 477 states and 47612 transitions. [2022-11-18 21:05:23,854 INFO L73 IsDeterministic]: Start isDeterministic. Operand 477 states and 47612 transitions. [2022-11-18 21:05:23,869 INFO L80 IsDeterministic]: Finished isDeterministic. Operand is deterministic. [2022-11-18 21:05:23,869 INFO L117 ReachableStatesCopy]: Start reachableStatesCopy. Operand 477 states and 47612 transitions. [2022-11-18 21:05:24,182 INFO L343 DoubleDeckerVisitor]: Before removal of dead ends has 478 states, 477 states have (on average 99.81551362683439) internal successors, (47612), 477 states have internal predecessors, (47612), 0 states have call successors, (0), 0 states 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 21:05:24,283 INFO L131 ReachableStatesCopy]: Finished reachableStatesCopy Result has 478 states, 478 states have (on average 170.0) internal successors, (81260), 478 states have internal predecessors, (81260), 0 states have call successors, (0), 0 states 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 21:05:24,304 INFO L81 ComplementDD]: Finished complementDD. Result has 478 states, 478 states have (on average 170.0) internal successors, (81260), 478 states have internal predecessors, (81260), 0 states have call successors, (0), 0 states 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 21:05:24,304 INFO L175 Difference]: Start difference. First operand has 458 places, 501 transitions, 4508 flow. Second operand 477 states and 47612 transitions. [2022-11-18 21:05:24,304 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 934 places, 3693 transitions, 32882 flow [2022-11-18 21:05:24,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 927 places, 3693 transitions, 31939 flow, removed 326 selfloop flow, removed 7 redundant places. [2022-11-18 21:05:24,918 INFO L231 Difference]: Finished difference. Result has 1122 places, 1776 transitions, 20656 flow [2022-11-18 21:05:24,919 INFO L271 CegarLoopForPetriNet]: {PETRI_ALPHABET=170, PETRI_DIFFERENCE_MINUEND_FLOW=4294, PETRI_DIFFERENCE_MINUEND_PLACES=451, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=501, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=477, PETRI_FLOW=20656, PETRI_PLACES=1122, PETRI_TRANSITIONS=1776} [2022-11-18 21:05:24,919 INFO L288 CegarLoopForPetriNet]: 155 programPoint places, 967 predicate places. [2022-11-18 21:05:24,920 INFO L495 AbstractCegarLoop]: Abstraction has has 1122 places, 1776 transitions, 20656 flow [2022-11-18 21:05:24,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 97 states, 97 states have (on average 98.0) internal successors, (9506), 97 states have internal predecessors, (9506), 0 states have call successors, (0), 0 states 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 21:05:24,922 INFO L201 CegarLoopForPetriNet]: Found error trace [2022-11-18 21:05:24,922 INFO L209 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2022-11-18 21:05:24,928 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae1e281-a220-45f3-a1d9-cdb616d889fd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2022-11-18 21:05:25,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae1e281-a220-45f3-a1d9-cdb616d889fd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2022-11-18 21:05:25,128 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting t2Err0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (and 4 more)] === [2022-11-18 21:05:25,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2022-11-18 21:05:25,129 INFO L85 PathProgramCache]: Analyzing trace with hash -837044260, now seen corresponding path program 2 times [2022-11-18 21:05:25,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2022-11-18 21:05:25,129 INFO L333 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319594644] [2022-11-18 21:05:25,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2022-11-18 21:05:25,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2022-11-18 21:05:25,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2022-11-18 21:05:28,127 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 4 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:05:28,128 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2022-11-18 21:05:28,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319594644] [2022-11-18 21:05:28,128 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319594644] provided 0 perfect and 1 imperfect interpolant sequences [2022-11-18 21:05:28,128 INFO L333 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164974521] [2022-11-18 21:05:28,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2022-11-18 21:05:28,129 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2022-11-18 21:05:28,129 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae1e281-a220-45f3-a1d9-cdb616d889fd/bin/uautomizer-TMbwUNV5ro/z3 [2022-11-18 21:05:28,141 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae1e281-a220-45f3-a1d9-cdb616d889fd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2022-11-18 21:05:28,161 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1ae1e281-a220-45f3-a1d9-cdb616d889fd/bin/uautomizer-TMbwUNV5ro/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2022-11-18 21:05:28,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2022-11-18 21:05:28,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2022-11-18 21:05:28,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 77 conjunts are in the unsatisfiable core [2022-11-18 21:05:28,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2022-11-18 21:05:29,118 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 15 [2022-11-18 21:05:30,391 INFO L190 IndexEqualityManager]: detected not equals via solver [2022-11-18 21:05:30,392 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 69 treesize of output 41 [2022-11-18 21:05:32,219 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 21 [2022-11-18 21:05:32,554 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 7 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:05:32,555 INFO L328 TraceCheckSpWp]: Computing backward predicates... [2022-11-18 21:05:37,347 INFO L350 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 54 treesize of output 46 [2022-11-18 21:05:38,334 INFO L134 CoverageAnalysis]: Checked inductivity of 69 backedges. 7 proven. 62 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2022-11-18 21:05:38,334 INFO L157 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164974521] provided 0 perfect and 2 imperfect interpolant sequences [2022-11-18 21:05:38,334 INFO L184 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2022-11-18 21:05:38,335 INFO L197 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 31, 29] total 90 [2022-11-18 21:05:38,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461398160] [2022-11-18 21:05:38,335 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2022-11-18 21:05:38,336 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 90 states [2022-11-18 21:05:38,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2022-11-18 21:05:38,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 90 interpolants. [2022-11-18 21:05:38,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=352, Invalid=7657, Unknown=1, NotChecked=0, Total=8010 [2022-11-18 21:05:38,402 INFO L478 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 170 [2022-11-18 21:05:38,410 INFO L100 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 1122 places, 1776 transitions, 20656 flow. Second operand has 90 states, 90 states have (on average 98.23333333333333) internal successors, (8841), 90 states have internal predecessors, (8841), 0 states have call successors, (0), 0 states 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 21:05:38,410 INFO L109 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2022-11-18 21:05:38,410 INFO L110 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 170 [2022-11-18 21:05:38,411 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand